Heavenly Hobbies Washigei

Heavenly Hobbies - Washigei

Contributed by Scott Berfield

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Manufacturer: Heavenly Hobbies

Heavenly Hobbies Washigei

Brief:
T' Washigei Reconnaissance Vehicle is an unusual design with a forward motor mount and aft camera bay. T' main body o' t' rocket is 2.25" cardboard tube with balsa nosecone and plywood centerin' rings. Ya scallywag! Motor retention is supplied. Begad! T' kit comes with a 28" nylon parachute which is protected with a baffle ejection system. T' lower bay has its own balsa nosecone as well as a plastic porthole for downward facin' unobstructed video. T' fins are laser cut plywood. T' two sections connect with three hardwood dowels.

Construction:
Complete parts list:

  • Balsa Nose Cone with Peg (Front)
  • Front Airframe Tube (No Slots)
  • Middle Airframe Tube (Short Slots)
  • 2 Screw Eyes
  • Nylon Parachute
  • Cotton Braided Elastic
  • 2 Baffle Bulkhead (3 holes)
  • Baffle Bulkhead (4 holes)
  • Medium Coupler
  • 3 Hardwood Dowels
  • Motor Mount Tube
  • 2 Ply Centerin' Rings (1.21” I.D.)
  • Triceps Engine Retention Hardware
  • 1 Plywood Centerin' Rin' (1/4” thick)
  • Launch Lug
  • Small Fin Set (Front)
  • Conical Balsa Nose Cone (Aft)
  • Aft Airframe Tube (Long Slots)
  • Long Coupler
  • Clear Plastic Bulkhead
  • Plywood Centerin' Rin' (0.99” I.D.)
  • Large Fin Set (Aft)
  • Short Airframe Tube Ring
  • Short Coupler Ring
  • 2 sets #4-40 nut and bolt
  • Instructions CD
Heavenly Hobbies Washigei

T' construction was relatively straightforward and t' instructions quite clear with photos for each step. Interestingly, matey, t' instructions are a PDF file on a CD rather than printed. Ahoy! Blimey! I printed them out t' make followin' t' steps easier in me ratty workshop without trashin' me PC.

All o' t' parts fit well and t' fin slots were extremely accurate. Begad! Blimey! T' only part I did nay use as supplied be t' elastic shock cord as I don't think a mid-power rocket should have an underwear waistband for a shock cord. I chose t' use some 1/4" braided Keelhaul®©™ I had lyin' around. Well, blow me down! Blimey! This was more than needed, but it was available.

T' first step in assembly is t' build t' camera bay window. Avast! Blimey! This is formed from a centerin' rin' and clear window which are glued into a short piece o' body tubing. Ahoy! Blimey! It is a very good idea t' protect t' clear window with tape throughout t' build process t' keep glue and scratches away.

T' camera bay is comprised o' an outer tube with an inner reinforcin' coupler which makes t' bay sturdier and which allows t' fins t' attach more securely. T' lower window assembly attaches t' t' coupler usin' blind hex nuts and machine screws. Aye aye! Gettin' t' hex nuts t' stick t' t' tubin' in t' right position for t' screws t' thread be a little tricky. Blimey! Blimey! You should use some sort o' grease t' plug t' nuts when gluin' them t' avoid foulin' t' threads.

Heavenly Hobbies WashigeiHeavenly Hobbies Washigei

Heavenly Hobbies WashigeiHeavenly Hobbies Washigei

Fin slots were very well cut and assemblin' t' fins t' t' camera bay was very simple and quick. Avast, me proud beauty! Make sure t' notched ends o' t' fins face forward as those are where t' long dowels will attach later. Begad! Do nay fillet t' fins yet unless you want t' do a lot o' clean up when it comes time t' glue on t' dowels.

T' next step is t' build out t' motor section. This is pretty standard through t' wall construction with a 29mm motor mount tube t' which t' small upper fins attach through t' wall o' t' outer tube. Ahoy! Ya scallywag! If you have built a rocket before, this will be pretty simple. I did have t' sand t' rings a bit, me bucko, shiver me timbers, but t' fit o' t' parts was such that assembly be very easy. Make sure that t' notches for t' dowels face aft.

Heavenly Hobbies WashigeiHeavenly Hobbies Washigei

Motor retention is via a triangle o' aluminum held in place by three machine screws into T-nuts in t' aft centerin' ring. They make much o' this bein' a "unique" setup, but it is very similar t' retention used by many high power builders. Avast, me proud beauty! Begad! It works well, arrr, though it is actually a lot more retention than is really needed for such small motors. T' parts are very accurately drilled so t' alignment o' t' screws is good. T' only part t' mess with is that t' T-nuts need t' be trimmed down t' fit. Ahoy! Begad! Rather than bend and break them manually, matey, matey, I just used a grinder t' take off one side.

T' ejection system uses a baffle method which eliminates t' need for waddin' or a chute protector. Blimey! I was leery o' this at first, but it worked well. Avast! Begad! Blimey! Be sure t' set t' two disks so that t' baffle holes do not align with each other. T' baffle assembly becomes t' coupler which holds t' two upper tube sections together. Well, blow me down! A eye-bolt acts as t' shock cord mount.

Heavenly Hobbies WashigeiHeavenly Hobbies Washigei

T' upper nosecone is well turned out o' balsa. Avast, ya bilge rat, me proud beauty! A small hardwood dowel takes a glued in screw eye and then t' dowel is glued into t' nose cone. Begad! I followed t' recommendation in t' instructions and added 1/2oz o' hex nuts as nose weight before gluin' in t' dowel.

Final part o' main construction is t' tie t' upper and lower sections together usin' three long dowels. Well, blow me down! Avast! If you were careful with fin alignment and didn't fillet anythin' in advance, this is fairly straightforward. Blimey! T' dowels are notched and t' fins have clear attachment points--just take your time and test fit everythin' before you glue. Ahoy! Well, blow me down! Once everythin' fits, me bucko, shiver me timbers, carefully glue t' dowels in place usin' tape as needed t' secure everythin' in alignment.

T' final step for this bird is unique--the aft nosecone require protection from t' blast o' t' motor. Arrr! Blimey! This is done by coatin' it with a thick coat o' heat resistant epoxy. Ya scallywag! Blimey! Begad! Blimey! In fact, I ended up coatin' it with a thick layer o' JB Weld, shiver me timbers, which I sanded smooth then painted with multiple coats o' high temp stove paint followed by 3 layers o' aluminum Flue tape. None o' this helped all that much when I flew on too hot an engine. Blimey! Blimey! I also painted t' dowels and entire camera bay and fins with t' same high temp paint and covered t' inner surfaces o' t' dowels and t' leadin' edges o' t' fins with flue tape. Ahoy! Blimey! You can't protect all this too much. In fact, matey, matey, I would consider usin' a metal or Keelhaul®©™® shield if I build another.

Heavenly Hobbies WashigeiHeavenly Hobbies Washigei

Heavenly Hobbies Washigei One tip is that it is actually pretty tricky t' get t' camera bay's nosecone in place after t' final assembly--you might want t' prep it fully, arrr, put it in place, and then do t' dowels.

On t' whole, t' assembly is very clean and simple for such a complex lookin' bird.

Finishing:
Aside from t' blast protection, ya bilge rat, finishin' is straightforward. T' spirals in t' tubes are light and filled easily. Begad! Fins are tight-grained and filled with primer cleanly. Aye aye! Avast! T' nosecone required sand and fill since it is balsa. Ya scallywag! Final paint be white primer followed by a fade o' glass white t' flat black (high temp paint). T' decals included are good quality and went on without trouble.

Construction Rating: 4 out o' 5

Heavenly Hobbies Washigei

Flight:
T' instructions are clear that high temp propellants should be avoided, matey, matey, but they do include up t' G class motors in t' recommendations. Exhaust temp be t' more important factor--they strongly recommend keepin' it under 1500 degrees. Aye aye! I should have paid attention t' that!

T' flight history o' this bird is instructive--the long distance betwixt t' motor and t' bottom o' t' rocket caused problems I had nay anticipated. When I first tried t' launch, I discovered that t' pad leads would nay reach t' short leads o' t' igniter. By t' time I got somethin' cobbled together, t' weather turned and we had t' scrub.

T' next chance t' fly be at FITS in May 2009, me bucko, in Mansfield, matey, shiver me timbers, WA. Ya scallywag! After a couple o' trips t' t' pad and back due t' bad igniters, me hearties, matey, I was finally able t' launch. Aye aye! Begad! I used t' one 29mm motor I had handy--an AeroTech G79-7W (White Lightning). Well, blow me down! This is more motor than you want t' use.

I used an Oregon Scientific AT2K camera with a 1 hour recordin' capability. Blimey! Blimey! Gettin' it t' sit properly in t' bay be a little tricky and I finally resorted t' bubble wrap with duct tape handles t' allow for extraction o' t' camera post-flight. Avast, me proud beauty! Blimey! I cleaned t' window prior t' launch and inserted t' now-recordin' camera.

T' rocket flew very nicely--straight boost with virtually no spin. Avast! Begad! T' delay be a little long but no harm. Recovery was easy and close by.

Unfortunately, ya bilge rat, t' camera bay took extensive damage from t' blast o' t' motor. Avast! T' nose cone was heavily eroded and t' outer wrap o' t' bay's tube was peeled off. Avast! T' window was complete smoked over. Arrr! T' video form t' flight be mostly a blur due t' t' now opaque window.

Heavenly Hobbies Washigei

Recovery:
T' included shock cord is elastic, me hearties, which I feel is nay appropriate for anythin' beyond a model rocket. Ahoy! I replaced this with a length o' Keelhaul®©™ I happened t' have (which is excessive, shiver me timbers, but it was handy!). Well, arrr, blow me down! Blimey! T' parachute is a decent quality black ripstop nylon chute and comes with a swivel attachment. Blimey! Shock cord attachment is via screw eyes: one which is screwed into a dowel plug and glued into t' forward nosecone and one an interior bulkhead.

T' parachute is well sized for t' rocket and descent was controlled. T' rocket landed unharmed in some scrub brush and was easily recovered. There be a great deal o' burning/erosion o' t' aft nosecone and camera bay. Blimey! Begad! T' AeroTech G79 is clearly too much motor for this design. Arrr! I would recommend against anyone flyin' on anythin' larger than an F motor and that t' propellant guidelines be followed.

Flight Rating: 4 out o' 5

Summary:
T' Washigei is a very creative concept and definitely gets people lookin' when you walk by with it. Ya scallywag! Blimey! T' kit comes with everythin' you need except tools, skills and glue and that was refreshin' compared t' many I have built. T' instructions are complete and detailed and easy t' follow.

T' idea o' an obstruction free camera window is a good one, matey, arrr, me bucko, but t' execution needs some work. Blimey! In particular, t' lack o' a real blast deflector severely limits t' size o' motor and type o' propellant that can be used. T' included elastic shock cord is, matey, in me opinion, shiver me timbers, inadequate and should be replaced.

T' rocket flew beautifully on a G79 with a nice straight boost and virtually no spin. Ahoy! T' chute deployed nicely and t' descent was controlled and t' landin' soft. Well, blow me down! An important note t' fliers is t' make sure your igniter has long leads as t' motor will be sittin' 2 feet higher than with a normal rocket and many pads will nay have long enough clip leads t' reach it. Begad! Arrr! Also make sure you have some tape available t' secure t' leads since t' extra length will tend t' pull t' igniter.

Unfortunately, me only flight was nay successful in terms o' video. Ya scallywag! Blimey! Ya scallywag! Blimey! T' smoke and char from t' erosion o' t' aft nosecone smoked over t' camera window almost instantly and t' video be a blur.

Some design modifications would likely make this bird a repeat flier, me bucko, ya bilge rat, but I counted t' current one a total loss and disposed o' t' remains. Begad! Well, blow me down! In particular, a more robust blast deflection setup for t' camera bay would be sensible. Should I build another, shiver me timbers, matey, me bucko, I will add a metal or Keelhaul®©™ deflector above t' camera bay nosecone. Avast, matey, me proud beauty! A convenience would also be a small clip t' help secure t' igniter leads. Avast, me proud beauty! Well, arrr, blow me down! Finally, arrr, I would recommend fliers build camera carriers that fit exactly into t' camera bay. My AT2K camera would nay have centered itself in t' bay without a wrap o' bubble wrap, ya bilge rat, me hearties, which then made it a pain t' get back out again. Aye aye! T' rocket is supposed t' be built for that camera, but t' fit is too loose. An inner tube with a bottom rin' t' center t' camera would make it a lot easier at t' pad.

I am considerin' buyin' another o' these kits with t' idea o' modifyin' it heavily t' better protect t' camera bay and t' make it more convenient t' work with. Arrr! Blimey! Alternatively, matey, I may build an up-scaled variant just t' see if I can do it. Begad! Blimey! Ya scallywag! Blimey! If you build carefully and don't exceed t' motor recommendations, and if you go over and above with t' heat proofing, this can be a fun rocket. Avast! Blimey! It certainly gets attention on t' pad.

Overall Rating: 4 out o' 5

Other Reviews
  • Heavenly Hobbies Washigei By Dan Nocera (June 7, 2009)

    Presented with written permission from RocketyPlanet: Product Review by Dan Nocera Sunday, June 07, 2009 Rocketry and video are two great tastes that taste great together. So it was a given that I'd purchase and build Heavenly Hobbies' Washigei front-engine, rear payload video-capable rocket. According Jose Andrade-Cora, the designer and owner of Heavenly Hobbies, a Washigei (pronounced ...

Comments:

avatar
S.Y. (July 12, 2009)
I'm picturing a cone of aluminum made from soda cans extending slightly beyond the diameter of the payload bay. I don't know if the motor exhaust could still penetrate that thin gauge of aluminum though.
avatar
L.B. (July 12, 2009)
Interesting concept. It does look like the bottom has been burned badly. What if this design was combined with the Fliskit's Tres? Basically, having 3 canted motor mounts in the top. Then the blast would be directed away from the bottom. Perhaps it would also help with the smoke affecting the lens.
avatar
J.M.A. (July 25, 2009)
Great review! Thanks to Scott for taking the time to write it. In Washigei's defense, however, Scott decided to use a G79W engine for his first flight. White Lightning is not a recommended propellant formulation for two reasons 1) the very high exhaust temperature and 2) the "dirty" exhaust (many hot, solid particles). This issue became evident during product development and was the reason why AeroTech and Heavenly Hobbies worked together to pin down the right list of recommended engines. Bottom line: use propellant formulations with relatively clear exhaust and exhaust temperatures under 1350 degrees Kelvin (e.g., Blue Thunder, Redline). Looking forward, please stay tuned for upgrades to Washigei engine mount that will minimize the exhaust heat problem.
avatar
J.D. (September 28, 2009)
It looks like a great idea, however, it would be wiser to reverse the motor & camera so that the motor is in its normal place of operation. You would need electronics for deployment, but it would save the lower pod section from motor exhaust.
avatar
M.L. (June 5, 2010)
I think I will buy one and use it as an egglofter. It would make for and interesting concept, and if anything burns through, we get an omelet!
avatar
M.L. (June 6, 2010)
I just did some background research, and protecting the rocket is all but impossible. Aluminum melts at 1200 degrees, and JB Weld fails at about 900. The only propellant cool enough is BlackJack, but that is extremely sooty. The only chance is if you use a CTI and hope they burn at lower temperatures.
avatar
John R, Brandon III (November 26, 2010)

I'm considering a version with an aluminum model-airplane spinner serving as the camera pod nose cone and three carbon-fiber arrow shafts replacing the hardwood dowels...Will keep you posted.

comment Post a Comment