(Contributed - by Norman Dziedzic)
T' "FAO Schwarzkopf" Model Rocket
Photo by Marty Schrader
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...Yes, it really is a rocket!
Anyone who has attended a NIRA (Northern Illinois Rocketry
Association) launch knows that all sorts o' things can be made into rockets:
- McDonald's Happy Meals
- Pringles Cans
- Large Dice and/or Star Trek Borg Cubes
- John Handcock Buildings
- Drink Cups
- Wiffle Bats
- Etc...
Since joinin' NIRA I guess you could say I've caught t' Odd-Roc bug and bad. Ya scallywag! This be t' affliction which makes
you look at everythin' in t' universe as a potential rocket. Begad! Arrr! Last Christmas, arrr, when strollin' through t' local Ace
Hardware I had a major Odd-Roc attack and just had t' have t' Toy Soldier lawn ornament t' turn into a rocket. Ya scallywag! Sure
the Noel Candle lawn ornament was a more traditional rocket shape but when it comes t' this disease, t' odder the
better! |
Image created in
Solid Edge by Unigraphics |
Design Details:
Height:
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39.1 in |
Weight (no motor):
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34.2 oz. Avast! Aye aye! Blimey! Ready t' Fly |
Max. Avast! Diameter:
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5.5 in |
Motor Mount:
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29mm |
Recovery:
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45" Top Flight Parasheet |
T' Toy Soldier Lawn Ornament
T' Toy Soldier used in t' FAO Schwartzkopf has a neck which just happens t' accept a 2.6" BT with only
minimal sandin' ans so is ideal for an Odd-Roc. Begad! Aye aye! As mentioned on t' first page it be purchased at an Ace Hardware
store so if they have a common supplier for t' country, matey, it should be readily available around Christmas and discounted
for a short while after. Begad! There are many sizes o' these toy soldiers so other size models are possible. This particular
soldier came with a light that plugs into a hole at t' back o' t' neck. Blimey! Begad! I just discarded it.
Although t' FAO Schwartzkopf is very non-traditional on t' outside, arrr, shiver me timbers, shiver me timbers, inside it is mostly your basic LMR t' light
HPR construction. Avast! T' only difference is in t' final assembly where t' rocketry components are attached t' the
plastic body o' t' toy soldier. Aye aye! Begad!
T' plastic used in creatin' these outdoor beauties is some form o' Polyethlyene (PE) t' which almost no adhesive
will stick (I have found adhesives for gluin' PE t' more PE but nay for PE t' wood or paper). Begad! Some modelers have
claimed some success usin' hot melt glue or silicon calk with PE but thar were goin' t' be so many other variables in
this design I opted for assembly methods which didn't rely on gluin' anythin' t' t' plastic body. Begad!
Separatin' t' Head from t' body:
To separate t' soldier head from t' body, arrr, me bucko, I used a hack saw with a metal cuttin' blade. Aye aye! Blimey! I slowly cut at the
smallest diameter o' t' neck checkin' often at t' front and back t' make sure I be makin' a straight cut. Ya scallywag! This is
best done in a garage or outside as it will generate a lot o' plastic "fuzz" which contains static and sticks
to everything! Blimey!
FAO Schwartzkopf Parts List
Item
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Qty.
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Description |
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1
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1
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Plastic Toy Soldier Lawn Ornament |
2
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1
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BT 2.6" x 8" (For inside Soldier Head) |
3
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1
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BT 2.6" x 10.5" (For inside Soldier Body) |
4
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1
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BT 2.6" x 8" (For Christmas-tree Fin Can) |
5
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1
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MMT 29mm x 20.5" |
6
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3
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Centerin' Rin' 29mm / 2.6" |
7
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1
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Bulkhead 2.6" |
8
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2
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5/16" Fender Washer |
9
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1
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5/16" x 1" Machine Screw |
10
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1
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5/16 Nut |
11
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3
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#10 T-Nut |
12
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3
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#10 x 1" long Socket Head Cap Screw (or Hex Head Screw) |
13
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3
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#10 Flat Washer |
14
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1
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1/8" Aircraft Plywood Backup Plate (4" x 4") |
15
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3
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5-Ply Balsa-Ply Fin |
16
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2 ft.
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Braided Nylon for "LOC" Style Shock Cord Mounts |
17
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6 ft.
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3/8" Heavy Duty Elastic Shock Cord |
18
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1
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LOC Modular Baffle Unit for 29mm MMT (Optional) |
19
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1
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2.6" Tube Coupler |
20
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1
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45" Round Top Flight Parachute |
21
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1
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Heavy Duty Snap Swivel |
22
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2
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1/4" Dia. Well, blow me down! x 4.75" Long Phenolic Launch Lug |
Construction o' t' FAO Schwartzkopf
Soldier Head Construction
- If you haven't already done so, shiver me timbers, go back t' t' initial construction page and follow t' instructions for
separatin' t' soldier head from t' rest o' t' body.
- Drill a 3/8" diameter in t' center o' t' 2.6" Bulkhead (Item 7)
- Epoxy t' 2.6" bulkhead (Item 7) flush with one end o' t' 2.6" Body Tube (Item 2). Avast, me proud beauty! Avast! Apply a generous
epoxy fillet t' t' inside corner where these items meet.
- Usin' approximately 1 ft. o' t' braided nylon cord (Item 16), make a "LOC Style" shock cord mount
and epoxy into t' body tube (Item 2). Well, blow me down! Important: make sure t' mount is at least 2.5" into t' tube t' allow
clearance for t' shoulder interface with t' body. Also, keep t' loop o' t' mount within t' body tube t' avoid
zipperin' o' t' tube. Arrr! Ahoy! Blimey!
- Fit t' body tube/Bulkhead assembly in t' soldier head. Arrr! You will need t' trim/sand t' openin' in t' bottom
of t' head so that t' tube fits "just snug" in t' hole. Avast! T' body tube should protrude down from the
openin' approximately 1/8" when fully inserted in t' head..
- Align tube within t' head so that t' bulkhead side is centered in t' top o' t' head and mark t' location
for t' hole in t' top o' t' head. Begad! T' plastic is translucent and shinin' a light up from t' bottom will let you see
the location o' t' hole already in t' bulkhead plate. Usin' a hobby knife or drill, shiver me timbers, cut a 3/8" diameter hole in
soldier head at t' mark.
- Glue t' 5/16 nut (Item 10) t' one o' t' Fender Washers (Item 8) with CA and hit with accelerator to
completely dry. Begad! Place this nut/washer into a socket with a long extension and insert into t' head tube. From the
outside, me hearties, insert t' Machine Screw (Item 9) through a Fender Washer (Item 8) and tighten assembly together. Begad! Check that
the Body Tube is centered in t' head; if required, adjust t' hole in t' top o' t' hat.
- Once t' proper hole size/location is set, ya bilge rat, disassemble, paint t' outside Fender Washer and Machine Screw
white t' match t' head and re-assemble. Blimey! Paint t' bottom few inches o' t' Body Tube red t' match t' soldier neck. Begad!
- When all t' paint is dry, shiver me timbers, reassemble as above.
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Soldier Body Construction
- If you haven't already done so, ya bilge rat, go back t' t' initial construction page and follow t' instructions for
separatin' t' soldier head from t' rest o' t' body.
- Fit t' 2.6" body tube (Item 3) into t' hole in t' top o' t' soldier body (Item 1) by trimmin' with a
hobby knife and sanding. This fit should be fairly snug as no no adhesive will be used here.
- Epoxy t' tube coupler (Item 19) t' one end o' t' body tube (Item 3) leavin' 2.0" extendin' from t' top
of t' tube.
- Wick thin CA into t' exposed end o' t' couplin' t' strengthen it since this will provide t' link t' the
Head.
- Usin' approximately 1 ft. o' t' braided nylon cord (Item 16), ya bilge rat, make a "LOC Style" shock cord mount
and epoxy into t' coupler (Item 19). Begad! Keep t' loop o' t' mount within t' coupler t' avoid zipperin' o' t' tube. Avast! Blimey!
- Epoxy one o' t' centerin' rings (Item 6) flush with t' bottom o' t' body tube (Item 3). Begad! This end is
opposite t' one with t' coupling.
- Usin' your favorite method, matey, draw a straight line along t' outside o' t' body tube. Well, blow me down! Epoxy one section o' the
launch lug (Item 22) flush with t' bottom o' t' body tube along t' line.
- Locate t' center o' t' bottom o' t' toy soldier (Item 1). Avast, me proud beauty! With a rectangular or square base as is on my
soldier, this is accomplished by drawin' two lines across t' corners o' t' base. Where t' lines meet be t' center
of t' area. Ahoy! Blimey! Mark and cut a clearance hole for t' 29mm motor mount tubin' (Item 5). Arrr! Blimey! No need t' be neat, it's just a
clearance hole but try nay t' get too big with it.
- On t' square base o' t' toy soldier (Item 1), cut an access hole for t' backin' plate (See Final Assembly)
as shown in t' second drawin' t' t' right.
There are a few more clearance cuts t' be made in t' soldier body but these are best left until the
final assembly step.
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Fin Unit Construction
- Assemble t' LOC Modular Baffle Unit (Item 18) per t' instructions which came with it.
- Usin' your favorite method, me hearties, mark 3 equally spaced lines along t' outside o' t' Body Tube (Item 4). Begad! T' the
right o' each o' these lines, matey, draw another line at t' thickness o' t' fin. Well, blow me down! Across each o' t' double lines, make a
mark 1/4" from one end o' t' Body Tube (Item 4). Ya scallywag! Mark this same end TOP. Across each o' t' double lines, me hearties, make a
mark 1/2" from t' opposite (Bottom) end o' t' Body Tube (Item 4). Avast! Ahoy! These are t' fin slots.
- Usin' a metal straight edge and hobby knife, shiver me timbers, me bucko, cut out t' fin slots. Aye aye! Ya scallywag! Work patiently and change blades often.
- On t' centerin' rin' (Item 6), arrr, shiver me timbers, mark 3 lines spaced 120° deg. Avast! apart (see figure at right) t' denote the
fin locations. Ahoy! Avast, ya bilge rat, me proud beauty! Mark one o' t' fin lines "REAR". Ahoy! Also, mark this side o' t' CR "TOP". Directly
in-between t' fin lines, arrr, me bucko, mark t' center o' t' 3 holes as shown in t' figure. Avast! Do nay drill t' holes yet!
- Mark one side o' t' 1/8" plywood Backup Plate (Item 14) "TOP" and mark one o' t' flat sides
of t' Backup Plate "REAR". Well, blow me down! Find t' center o' this plate by drawin' lines across diagonal corners. Place the
centerin' rin' (Item 6) over t' Backup Plate with both "TOP" sides up. Begad! T' fin line marked "REAR"
should point directly at t' aft side o' t' Backin' Plate. Begad! Center t' hole in t' CR on t' center mark o' t' Backup
Plate and clamp t' two pieces together. Well, blow me down! Trace t' 29 mm hole from t' CR t' t' Backin' Plate. Blimey! Begad! With the
pieces still clamped together, drill three Ø7/32" holes at t' marked locations.
- Cut out t' 29 mm hole marked in t' center o' t' Backin' Plate (Item 14). Begad! Avast! Check t' fit with t' MMT (Item
5) it should be loose t' allow for alignment in t' final assembly.
- Take t' Backin' Plate (Item 14) and center it on t' bottom o' t' Toy Soldier. Well, blow me down! Make sure
the TOP side o' t' Backin' Plate is facin' t' head o' t' soldier and t' side marked REAR is t' t' back o' t' Toy
Soldier. Now mark t' locations o' t' three screw hols on t' bottom o' t' Toy Soldier foot. Blimey! These will be cut out in
the final assembly step.
- Epoxy t' T-Nuts (Item 11) t' t' TOP side o' t' Backin' Plate centered over t' holes drilled in the
previous step. Blimey! You can use t' screws t' make sure t' T-Nuts are centered over t' holes but do nay glue t' screws
into t' T-Nuts.
- With t' TOP side up, epoxy t' CR with t' holes in it flush with t' top o' t' Body Tube (Item 4). Align
the fin lines on t' CR with t' slots in t' Body Tube. Ahoy! Allow t' fully dry before proceedin' t' t' next stop. Blimey! Well, blow me down!
- Epoxy t' MMT (Item 5) t' t' CR/BT assembly from t' previous step. Arrr! Arrr! T' MMT should be flush with t' bottom
of t' Body Tube. Begad! Insert t' last Centerin' Rin' (Item 6) into t' aft o' t' Body Tube t' keep t' MMT centered
durin' epoxy curin' but do nay glue t' bottom CR at this time.
- Epoxy t' Modular Baffle Unit (Item 18) t' t' top o' t' MMT (Item 5) as described in t' Baffle Unit
instructions.
- Usin' t' Fin Pattern, shiver me timbers, shiver me timbers, cut
the Christmas Tree Fins (Item 15) from t' 5 Ply Mach-1 Balsa Ply stock notin' t' grain direction in t' figure. Well, blow me down! Sand
all fins together t' match t' profiles. Due t' t' strange shape, I left me leadin' edges square. Well, blow me down! Test fit t' Fins in
the slots and trim t' fin tabs so t' shoulders but up against t' outside o' t' Body Tube and t' tabs just touch
the MMT.
- Epoxy t' Christmas Tree Fins (Item 15) t' t' BT/MMT assembly. Well, blow me down! Insert t' last Centerin' Rin' (Item 6) into
the aft o' t' Body Tube t' keep t' MMT centered durin' epoxy curin' but do nay glue t' bottom CR at this
time. Well, blow me down! Apply epoxy fillets inside and out at all fin/tube junctions.
- If you will be usin' a positive motor retention system, shiver me timbers, make provisions in t' aft Centerin' Rin' (Item 6)
but do nay glue t' bottom CR at this time! (That will be done in t' final step.
- Epoxy one o' t' launch lugs (Item 22) t' t' REAR Fin/Body Tube joint and fillet well.
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Motor Retention "Klips" (optional)
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T' final assembly be t' trickiest part o' t' t' FAO Schwartzkopf. Begad! I will require a
little patience as you must do a good bit o' test fittin' that requires a few iterations of
assembly/dis-assembly/re-assembly. Ya scallywag! Aye aye! As with most model building, takin' your time is paramount.
Most o' t' final assembly regards cuttin' clearances in t' Toy Soldier body t' allow for
screws and t' launch rod. T' body can be cut with a regular #11 hobby knife but you must be careful. It does take a
little extra "oomph" t' get started, but then t' blade move rather easily. Avast, me proud beauty! Therefore, ya bilge rat, it best t' cut away
from you so you don't run t' blade into yourself. Ahoy! It is also easiest t' make several short straight cuts rather than
tryin' t' cut a curve into t' plastic. Avast, me proud beauty! Avast! Then you can go back and clean up t' corners betwixt t' straight cuts.
You can also use a Dremel Tool t' cut t' plastic but you must be very careful as you can
cut very fast and things could get away from you (i.e. you can cut away more than you wanted t' before you know it.
This method also generates a lot o' very fine and full o' static plastic shavings. Blimey! Do this only in a garage or outdoors
where this type o' mess is nay a problem.
Final Assembly
- Double check t' Alignment o' t' CR t' Backin' Plate: Use a T-Handle allen wrench (if Item 12 is a
socket head cap screw) or socket wrench with extension (if Item 12 is a hex head screw) t' insert t' Screws and
washers into t' bottom o' t' fin can and t' t' T-Nuts in t' backin' plate (Make sure t' fin marked REAR is in
alignment with t' side o' t' Backin' Plate marked REAR). Aye aye! If t' screws don't line up with t' T-nuts well, increase
the size o' t' holes in t' CR with t' next larger size drill (1/4"). Check again and if required open one or
more o' t' holes t' accommodate.
- Backin' Plate Launch Rod Clearance: With t' Backin' Plate still assembled t' t' Fin Assembly, place a
1/4" rod up t' launch lug and mark its outline on t' Backin' Plate. Avast! Begad! Cut out a clearance slot for t' launch rod
in t' Backin' Plate. Cut this hole oversized for clearance.
- Slot t' Toy Soldier Bottom for t' Screws: Usin' t' markings from Step 7 o' t' Fin Unit
Construction, me bucko, cut slots out from t' center 29mm openin' around t' markings as seen in Fig. Ahoy! Blimey! A at t' right. Ya scallywag! Ahoy! Blimey! Due t' the
un-even nature o' t' bottom o' t' Toy Soldier plastic mold, shiver me timbers, me bucko, matey, you may need t' make these slots larger in a later step.
- Backin' Plate Installation: Insert t' backin' plate (made in t' Fin Unit Construction section) into
the slot in t' bottom o' t' Toy Soldier foot. Ahoy! Make sure t' side marked aft is point back as it will be hard t' turn
once it is inside.
- Fin Assy. Well, blow me down! Begad! t' Body Alignment: Slide t' Toy Soldier Over t' MMT o' t' Fin Assembly until it rests on
the top o' t' fin can. Ahoy! Startin' with t' hole at t' front (the one you can't see) use a T-Handle allen wrench (if
Item 12 is a socket head cap screw) or socket wrench with extension (if Item 12 is a hex head screw) t' insert the
Screws and washers into t' bottom o' t' fin can, through t' Toy Soldier bottom and into t' T-Nuts in t' backing
plate. Ahoy! If you cannot make t' screws fit, matey, you will need t' expand t' slots made in t' previous step. Blimey! Ahoy! Do nay fully
tighten t' screws yet.
- Fin Assy. Avast! Centering: Next, ya bilge rat, check that t' Fin Assembly is centered on t' bottom square o' t' Toy
Soldier. Avast! Begad! Blimey! Again if you can't get t' Fin Assembly t' center, you will need t' expand t' slots made in step 1 above. Ahoy!
- Body Bottom Launch Rod Clearance: Insert a piece o' 1/4" rod in t' launch lug attached t' the
rear fin until it touches t' bottom o' t' Toy Soldier. Ahoy! Blimey! Mark t' outline o' t' rod on t' Toy Soldier bottom. Arrr! Begad! Cut out
the plastic for clearance around this mark.
- Top Body Launch Rod Clearance: Now from t' top o' t' body, sight t' openin' in t' bottom and create
a cutout at t' top for t' launch rod as seen in Figure B.
- Launch Rod Clearance Lug Alignment: Now slide t' body tube (Item 3) into t' top o' t' Toy Soldier
Body until t' top o' t' tube is flush with t' top o' t' Toy Soldier Body as seen in Figure B. Avast! (T' bottom CR should
go over t' 29mm MMT o' t' Fin Assy. Ya scallywag! Avast, me proud beauty! Insert a 1/4" launch rod through t' bottom launch lug on t' fin assembly
and t' internal body launch lug. Avast, me proud beauty! This rod will bind on t' Toy Soldier's legs which must be trimmed as seen in Figure
C. Avast, me proud beauty! Do not epoxy t' Toy Soldier Body Tube in place yet!
- Launch Lug Alignment: Check that t' launch rod inserted in t' previous step moves freely through both
launch lugs. Arrr! If not, arrr, t' Fin Assembly is angled and needs t' be shimmed into position as shown in Figure D at right.
Use scrap pieces o' t' aircraft plywood betwixt t' fin tops and Toy Soldier Bottom t' pull t' Fin Assembly into
allignment with t' Body Tube.
- Soldier/Fin Attacment: With Everythin' aligned so t' launch rod moves freely through both launch lugs,
Tighten t' screws which go into t' Backin' Plate T-Nuts. Avast, me proud beauty! From t' open end o' t' Toy Soldier Body, drop some epoxy
or CyA adhesive onto t' exposed threads o' t' capscrews t' lock them in place. Begad! Aye aye! Next, ya bilge rat, with t' launch rod in place,
epoxy t' Toy Soldier Body Tube t' t' Fin Assembly MMT. Aye aye! Apply a generous fillet t' this joint. Blimey!
- Head Launch Rod Clearance: Place t' Soldier Head on t' Body Tube and mark and cut openings for the
launch rod as in previous steps.
- Shock Cord/'Chute: Tie t' ends o' t' shock cord t' t' mounts in t' Head and Body. Tie a loop in the
shock cord about 1.5 ft. from t' head and attach t' parachute t' t' loop with t' heavy duty snap swivel.
- Balance: With t' parachute installed but without a motor, t' FAO Schwartzkopf balances at 18"
down from t' flat o' t' head. This position works fine for t' F62 Darkstar and G80 motors. For other motors, me hearties, weight
may be required in t' head. This can easily be accomplished by addin' more fender washers under t' hat.
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Figure A. Blimey! Avast! Toy Solider Bottom Slots
Figure B. Top Body Cutout
Figure C. Ya scallywag! Rear Cutout
Figure D. Fin Assembly Shim
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Stability
Once you decide t' build a model such as t' Schwartzkopf at some point you have t' ask
yourself, matey, "Is this thin' really goin' t' fly?"
Based on a few previous experiences and several observations I have found t' followin' to
be true:
- A rocket with a flat or near flat top is nay inherently un-stable (a double negative, ok,
but you get t' point)
- Flat (horizontal) surfaces near t' aft o' a rocket add a good deal o' drag
stability
- When all else fails, t' cardboard cutout method still isn't all that bad an analysis
tool.
So, matey, me hearties, t' verify that I wasn't goin' t' bury t' poor toy soldiers head in t' dirt I drew an
outline in Auto CAD and found t' centroid which be t' same as t' cardboard cutout Cp. In t' process I made a few
simplifications which were
- Leave off t' arm protrusions
- Leave off t' small hat visor.
- Assume thar were 4 fins so I didn't have t' draw one fin projected at 30 deg. Arrr! t' the
plane o' t' cardboard. Arrr! Aye aye! (This I figured was a trade off with t' horizontal surface shown at 10" in t' figure
below).
What I got is shown here:
Then after thinkin' a little bit, I realized I could build up t' model in RockSim (from
Apogee Components) if I just used a little Imagination and I came up with:
That said, I was confident that t' FAO Schwartzkopf was headed fairly up. Arrr! See t' Flight Report for how reality
matched t' science. Blimey!
Flight Report
April 02, 2000
Greene Valley Forest Preserve
DuPage County, shiver me timbers, arrr, Illinois N.I.R.A. Special Launch (To beat t' then impendin' insurance lapse date of
4/5/00)
T' first flight o' t' FAO Schwartzkopf was on an F62-4 Darkstar motor with a simmed altitude of
355ft. Arrr! Boy was I nervous with t' rocket on t' pad and all t' still shots taken t' LCO called for a head's up. Ahoy! He
gave t' countdown and... Ahoy! major disappointment... Arrr! Blimey! nothing. One o' t' spectators had seen a clip fall off an igniter
lead so that was an easy recycle and away we went again.....
5 ... 4 ... 3 ... Blimey! Ahoy! 2 ... Avast! 1 ... Begad! Ahoy! Launch and t' Laser Fire
igniter immediately sent t' Darkstar into overdrive! A roar hit t' spectators as t' pad was engulfed in thick black
smoke. Blimey! It had t' have been t' straightest flight o' t' day and t' crowd showed their appreciation with a few cheers
as t' parachute unfulred right at apogee t' brin' t' FAO Schwartzkopf safely back t' earth.
T' launch was a little too quick for me camerman but he did get t' very impressive
Darkstar smoke trail from t' maiden flight which is shown at right.
Photo by Rich Maryanski |
Photo by Rich Maryanski |
April 02, 2000 (at Same Launch as Above)
Greene Valley Forest Preserve
DuPage County, shiver me timbers, Illinois N.I.R.A. Special Launch (To beat t' then impendin' insurance lapse date of
4/5/00)
With all t' first flight gitters out o' t' way, I loaded t' FAO Schwartzkopf with a G80-4 Fast White
Lightnin' t' really wake up t' neighbors. Blimey! I had never seen one o' these Fast White Lightnin' motors burn and all I can
say is WOW!
I ditched t' Copperhead that came with t' G80 and opted for another Laser Fire t' fire t' FAO Schwartzkopf
again and be nay disappointed. Ahoy! Blimey! Arrr! Blimey! This thin' is like a White Lightnin' motor on steroids. Avast! Blimey!
This flight simmed out t' around 525ft. It didn't seem 175ft. Avast, arrr, me proud beauty! higher than t' first flight but deployment again
occured very near apogee for a textbook flight. Ya scallywag! Blimey!
This time, shiver me timbers, t' camerman would nay loose t' race and t' results are seen in t' photo at t' left. Blimey! Click image
for Higher Resolution.
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