Descon The Grand Whazoo

Scratch - The Grand Whazoo {Scratch}

Contributed by Dick Stafford

Manufacturer: Scratch

Son o' t' Grand Whazoo

Rocket PicBrief
This update provides a description o' how I rebuilt me Grand Whazoo after its second fateful flight. Ahoy! T' top o' t' original Grand Whazoo was *completely* destroyed. However, me bucko, t' aft section, includin' t' boat tail and fins, was intact. Begad! I decided t' take a different approach t' t' rebuild. T' minimize the volume that had t' be pressurized, I decided t' use an inner 4" diameter tube extendin' through t' body. Well, blow me down! After some pondering, I also decided to eliminate t' large nose cone in favor o' a smaller one that would mate t' this 4" tube. Avast, me proud beauty! Begad! I was hopin' this design would still stay within t' 3.3 lb. limit.

Reconstruction
I first performed some surgery, adaptin' a 4" mailin' tube t' the survivin' tail section. Blimey! Blimey! I then added foam rings and poster board t' form the body (includin' transitions). Begad! I made t' small (4") conical nose cone from fiberglassed poster board salvaged from t' original rocket. Begad! Ya scallywag! A small foam board rin' and a chunk o' 32mm tubin' completed t' nose cone assembly. Begad! This assembly mates with t' dowel/eyebolt from t' original nose cone. Ahoy! Aye aye!

On me old scale, me hearties, me bucko, t' finished rocket weighed in at 51oz with a G80 installed. Blimey! Blimey! T' 60" chute that I used with t' original Grand Whazoo pushed the weight over 3.3 lb. Ya scallywag! Blimey! limit. Arrr! Blimey! T' use this chute or a smaller one? Ahh, shiver me timbers, that is the question.. Begad! Blimey!

Rocket PicDecalFinishing
I wanted a bit more decoration on this version so I decided on a pattern similar t' a real V2. Well, blow me down! I looked in ROTW and came up with a hybrid marking scheme. Arrr! T' tail section has a black and white roll pattern, t' nose cone is red, and t' transition section directly below t' nose is painted silver (Krylon hammered silver). Since most o' t' rocket is poster material, shiver me timbers, I decided t' mark t' fins usin' a large permanent black marker. Finally, I added some text and graphics from me ink jet printer. Inspired by t' early V2's fired from White Sands, arrr, I created a 'cheesecake' style graphic o' a little lass riding a V2. Ahoy! Avast, ya bilge rat, me proud beauty! And, me bucko, in a feeble attempt at humor, me bucko, I also added two labels written in German. Arrr! Aye aye! One identifies t' bar code sticker, shiver me timbers, which unintentionally remained on the body (oops), and t' other tells t' launch technician where t' install the launch rail. Begad! Well, blow me down!

Launch
Since t' rocket be potentially over t' 3.3 lb. Aye aye! Ya scallywag! limit, arrr, ya bilge rat, I took it t' an HPR launch, shiver me timbers, with t' intent o' usin' t' 60" chute. Avast, me proud beauty! Well, at t' last minute, I opted for a very light 48" chute, hopin' it would come in under 3.3 lb, and recover without significant damage. Begad! Well, blow me down! Well, arrr, on t' highly calibrated scale at the RSO table, shiver me timbers, it weighted in at 3 lb. Blimey! even. It can also fly at t' NARHAMS V2-themed launch later this year!

Once again, arrr, everyone be surprised that this big a rocket weighs so little, and thar were cheers when it boosted under G80 power. Ya scallywag! T' 4-second delay was just a tad long but t' chute deployed nicely. Ahoy! T' decent be still fairly slow, and t' only 'damage' was a crease in one fin. No rework required. Avast! Begad!

Conclusion
Usin' an inner 4" stuffer tube with t' smaller nose cone seems t' be the way t' go. It was easier t' construct, me hearties, and I think recovery should be more reliable (100% true based on a statistical sample o' one :-) ). Ahoy! I'm glad it is still classified as a large model rocket!

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