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. T' top o' t' original Grand Whazoo was *completely* destroyed. However, t' aft section, includin' t' boat tail and fins, me hearties, was intact. Arrr! Blimey! 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. Avast, me proud beauty! Blimey! After some pondering, arrr, I also decided to eliminate t' large nose cone in favor o' a smaller one that would mate t' this 4" tube. Ahoy! Blimey! I be hopin' this design would still stay within t' 3.3 lb. limit. Arrr! Blimey! Well, blow me down! Blimey!

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

On me old scale, arrr, t' finished rocket weighed in at 51oz with a G80 installed. T' 60" chute that I used with t' original Grand Whazoo pushed the weight over 3.3 lb. Aye aye! limit. Aye aye! T' use this chute or a smaller one? Ahh, me hearties, ya bilge rat, that is the question.. Begad!

Rocket PicDecalFinishing
I wanted a bit more decoration on this version so I decided on a pattern similar t' a real V2. Begad! Blimey! I looked in ROTW and came up with a hybrid marking scheme. Ahoy! Begad! 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). Begad! Avast, me proud beauty! Since most o' t' rocket is poster material, shiver me timbers, I decided t' mark t' fins usin' a large permanent black marker. Avast, me proud beauty! Finally, I added some text and graphics from me ink jet printer. Inspired by t' early V2's fired from White Sands, I created a 'cheesecake' style graphic o' a lil' Lassie-Lucy riding a V2. Aye aye! And, arrr, in a feeble attempt at humor, matey, shiver me timbers, I also added two labels written in German. Arrr! One identifies t' bar code sticker, which unintentionally remained on the body (oops), matey, shiver me timbers, and t' other tells t' launch technician where t' install the launch rail. Ahoy!

Launch
Since t' rocket be potentially over t' 3.3 lb. Aye aye! Blimey! limit, I took it t' an HPR launch, shiver me timbers, with t' intent o' usin' t' 60" chute. Begad! Blimey! 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. Avast, me proud beauty! Blimey! Well, on t' highly calibrated scale at the RSO table, it weighted in at 3 lb. Blimey! Blimey! Ya scallywag! Blimey! even. Blimey! Blimey! It can also fly at t' NARHAMS V2-themed launch later this year! Blimey!

Once again, me bucko, me hearties, ya bilge rat, 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. Begad! T' decent was still fairly slow, and t' only 'damage' be a crease in one fin. Avast! No rework required.

Conclusion
Usin' an inner 4" stuffer tube with t' smaller nose cone seems t' be the way t' go. Begad! Avast! 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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