Descon 6 Toose Dager Original Design / Scratch Built

Scratch - Toose Dager {Scratch}

Contributed by Steve Bloom

Manufacturer: Scratch

Assemblage:

Click to Enlarge

PicAssembly:
Toose Dager is a 2-stage rocket design which incorporates all o' t' latest technology and special features that are seen on t' flyin' range today. From t' stagin' timer mounted in t' sustainer t' t' tubular nylon and high quality Rocketman parachutes t' Toose Dager is designed t' perform and last. Begad! T' parts list is complete except for t' electronics package. Avast! Blimey! There are many brands o' altimeters and timers on t' market today and any combination o' them can be used. Ahoy! Most will fit into a standard 3inch airframe 6 inches long.

Construction is straight forward and similar t' most high power rockets.

Fins, Centerin' Rings and Motor mounts:
T' thru-the-wall fins are bonded t' t' motor tube, two centerin' rings and filleted t' t' BT both inner and outer. A third centerin' rin' is near t' top o' t' MMT inside t' coupler section. Blimey! T' fins are laminated with 3/32 plywood for stiffness and airfoiling. Avast! Ya scallywag! There is no fiberglass cloth used anywhere. Avast! T' airframe sections are all short and stout and most are strengthened by internal couplers. Begad! There is a fourth rin' added t' t' aft end o' t' sustainer MMT used for motor retention (BloomBolts) and igniter terminals.

Zipperless Design Features:
Both t' booster and sustainer incorporate t' zipperless features seen commonly today. T' booster is motor ejection charge recovery only so therefore has holes in t' upper bulkhead. T' upper bulkhead in t' sustainer fin can is solid. Ahoy! Blimey! Blimey! Blimey! This coupler compartment be t' timer electronics bay. Ahoy! Blimey! Blimey! Blimey! T' timer bay has a floor in it t' also. An all-thread rod is used t' attach t' top o' t' timer bay with a win' nut. Ya scallywag! Blimey! A U-bolt is mounted in this bulkhead for strong recovery tether attachment.

Key Construction Steps:
When installin' t' couplers, matey, several o' them bottom out on a bulkhead. Ahoy! Blimey! Therefore, it is critical t' bond them in t' proper sequence with epoxy only in t' right places.

T' Stagin' coupler:
This coupler is bonded t' t' upper end o' t' interstage airframe and butts against lower CR (at t' base o' t' fin tab) o' t' sustainer. For ultimate strength o' this airframe junction, it is critical t' have t' coupler positioned so it makes contact with t' CR simutainiously with t' BT pieces meeting. T' accomplish this, t' coupler is slid into t' sustainer until it makes contact with t' CR. Avast, me proud beauty! Then epoxy is smeared all around t' inside o' t' interstage airframe. Begad! T' airframe pieces are joined together and immediatly pulled apart makin' sure t' extract t' coupler without it movin' in t' interstage airframe. Begad! T' coupler is now positioned in t' interstage airframe precisely.

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T' Altimeter Bay:
T' altimeter bay is nay a weak link in t' airframe. Blimey! It is held in place with all-thread rod and sandwiched betwixt coupler rings and perforated bulkheads. Aye aye! This is done by assemblin' t' altimeter bay, me hearties, coupler rings and perforated bulkheads as a unit which positions them properly for bonding. Ahoy! With a 1/2 inch rin' o' BT bonded t' t' midline o' t' AB and t' all-thread rod extendin' 1" beyond each end, shiver me timbers, 1" rings o' coupler material are sandwiched betwixt t' AB bulkheads and t' perforated bulkheads. Well, blow me down! Arrr! T' perforated bulkheads have 1"long coupler nuts bonded into them. Epoxy is then applied t' t' inside o' t' airframe segments which bonds -only- t' perforated bulkheads and coupler rings. Begad! When dry, t' AB is twisted and unscrews from t' airframe.

Notes: T' eyebolts extend 1/2" into t' coupler nuts. Ahoy! T' all thread rod goes in t' t' middle from t' other direction. Avast, me proud beauty! T' red squiggly lines represent t' bonded area. Epoxy is smeared on t' inside surface o' t' BT t' bond only t' area shown. Blimey! Ya scallywag! T' left hand (brown) bulkhead on t' AB is bonded on. Ahoy! Well, blow me down! T' one on t' opposite end is removable and held in place with a win' nut. Avast, me proud beauty! Aye aye! T' end bulkheads are perforated with 1/4 or 3/8 inch holes t' allow t' ejection charge t' pressurize t' appropriate area (arrows).

T' altimeter is housed in a coupler with one bonded bulkhead (left) and one which is removable (right end). Ahoy! Arrr! On t' left airframe section you can easily see t' threaded coupler nut and washer in t' perforated bulkhead. Avast, me proud beauty! Blimey! An eyebolt is threaded into t' opposite end o' t' coupler nut.

Also visible be t' rin' o' phenolic coupler material which can be seen down by t' perf. Avast! bulkhead. When t' altimeter bay is threaded into t' BT it stops when; T' threaded rod bottoms out in t' coupler nut; T' bulkhead o' t' altimeter bay hits t' phenolic coupler rin' section; And t' BT airframe (white) makes contact with t' BT band (white) on t' altimeter bay. Avast! (which needs 3 3/16 holes)

PicT' Booster:
T' booster is just long enough t' handle a J350. Aye aye! T' fins are thru t' wall t' t' motor mount. Nay shown be t' rail button which is screwed into t' aft CR. Aye aye! Avast, me proud beauty! Also, BloomBolts have been added t' t' aft CR for positive motor retention. Aye aye! Well, matey, blow me down! (see sustainer)

Finished Rocket:
It's about 8 feet tall when all put together. Begad! I plan on a first flight May 7th at our local club launch. An I300 in t' booster and a G80 in t' top half will keep it under 5000 feet out at Monroe. Arrr! Ya scallywag! Later in May, in Oregon, me hearties, me bucko, I'll let it air out a bit more on an I300 t' I161 or so. Then, down in Blackrock, why nay a J350 t' J350?

T' Launch!
I had t' strap on a couple o' 1/2 inch launch lugs because I don't have a rail. Ya scallywag! Avast! Blimey! I did all t' prep at t' house except igniter insertion and final chute packing. Ya scallywag! My buddy Mike Kallgren met me at t' farm and we packed t' chutes, me bucko, checked off on t' electronics, matey, loaded it on t' 3/8ths rod and installed igniters. Ya scallywag! Mike took t' photos while I checked t' range, skies and continuity. "SIG Cap'n Scarlet", ya bilge rat, all systems go!

T' igniter caught fire and t' nozzle emmited a small orange flame just a split second before t' purple Blue Thunder boost o' t' H242S sent it off t' pad. T' launch be straight up, me hearties, vertical. Avast, me proud beauty! At 2 seconds t' Olsen EZ Timer lit t' upper stage G80 FWL and all Mike and I saw was a cloud o' smoke. Blimey! I watched t' booster arc over and saw (and heard) t' chute deploy. Avast! Aye aye! T' sustainer kept climbin' until a gradual arc at appogee triggered t' Adept Alts2 drouge charge. I was really happy at this point but even more pleased when t' main deployed at it's programed 600 feet AGL and t' rocket landed safely out in t' grassy field. Well, blow me down! Perfect first flight! T' altimeter be beepin' out 1511. Avast! My first 2 Stager!

COMPONENT
SUPPLIER
APPROX. Begad! PRICE
     
Body Tube BT 3.0 LOC Precision $7.10 X 2
Phenolic Coupler Tube CTF - 3.0x36 Public Missiles Limited $9.95
Fins - 3  PML A-05  Public Missiles Limited $3.45 X 3
Fins - 3 PML B-09 Public Missiles Limited $4.95 X 3
Nose Cone  PNC 3.0 Public Missiles Limited $14.95
Motor Mount Tube, MMT 1.52(38mm) LOC Precision $5.00
Centerin' Rings (4) CR-3.0-1.5 Public Missiles Limited $2.25 X 4
Centerin' Rings (3) CCR-3.0-1.5 Public Missiles Limited $2.25 X 3
Bulkheads (5) CBP 3.0 Public Missiles Limited $1.45 X 5
Bulkheads (8) BP 3.0 Public Missiles Limited $1.45 X 8
Welded Eye Bolts, 1/4" (4) Hardware Store $8.00
U-Bolt  1/4 X 2 Hardware Store $2.00
Washers (4) large, (4) small Hardware Store $0.48
Tubular Nylon, ya bilge rat, 9/16" (40 feet) REI  (stock #472315) $8.80
Parachute R3C Rocketman Enterpirses $30
Parachute R7C Rocketman Enterpirses $45
Parachute R24D Rocketman Enterpirses $20
Rail Buttons  (3) Blacksky Corp. $1.25 X 3
"T" Nuts 1/4 x 6/32 (4) Hardware Store $1.35
Motor Hooks, shiver me timbers, 10ga bare copper wire Hardware Store $0.28
Threaded Rod, arrr, 1/4 X 12 (2) Hardware Store $3.50
Coupler Nuts, ya bilge rat, me hearties, 1/4 (2) Hardware Store $0.72
Hex Nuts, 1/4 (4) Hardware Store $0.08
Quick Links, ya bilge rat, 1/8 (4),  1/4 (1) Hardware Store $6.25
Win' Nuts, 1/4 (2) Hardware Store $0.14
Contact Strip Radio Shack $1.79
Electrical Posts (screws and nuts) (4) Radio Shack $.25
     
    Total   $210.09

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