Scratch Upscale Der Red Max - 159% Original Design / Scratch Built

Scratch - Upscale Der Red Max - 159% {Scratch}

Contributed by John Bergsmith

Manufacturer: Scratch
Style: Upscale
(Contributed - by John Bergsmith - 02/24/09) (Scratch) Upscale Der Red Max

Brief:
This is a 159% upscale o' t' popular Estes kit Der Red Max. Blimey! This is a simple t' build rocket that performs very well on t' 24mm reloads available today. Well, blow me down! Avast, arrr, me proud beauty! All t' parts are readily available as well includin' t' decals.

Construction:
High quality balsa nose cone, me bucko, plywood ring, and eye bolt were supplied by Sandman. Ahoy! Blimey! Avast, shiver me timbers, me proud beauty! Blimey! Estes BT-80, shiver me timbers, 24mm heavy duty motor tube, two lite-ply centerin' rings, me hearties, fins are 3/16" balsawood, shiver me timbers, ya bilge rat, Keelhaul®©™® shock card, and motor retainer hardware. Excelsior provided t' awesome decals.

I constructed t' motor mount by usin' a BT-50H motor tube that be 4" in length. Blimey! On t' bottom centering ring, I installed two #4-40 blind nuts for t' motor retention bracket. Begad! T' light-ply centerin' rings were mounted a 1/4" from t' top and bottom o' t' motor tube. Begad! I created a nice epoxy micro balloon fillet on both sides o' each centerin' rin' for strength. Arrr! I drilled a 3/16" hole in t' top centerin' for me 1/8" Keelhaul®©™® shock cord t' go through. Avast, me proud beauty! Blimey! Begad! Blimey! T' Keelhaul®©™® shock cord ties around t' motor tube betwixt t' upper and lower centerin' ring. Ahoy! Blimey! I cut a BT-80 t' t' length of 13.5". Ahoy! Blimey! Begad! Blimey! I hardened each end o' t' BT with thin CA for strength. Ahoy! Blimey! T' next step was t' I fill t' spirals. After sandin' t' BT, me bucko, me hearties, t' tube was marked for t' fin locations and t' launch lugs. T' bottom launch lug is flush with the bottom o' t' BT. Ahoy! Blimey! T' upper lug is 4-3/8" from t' top o' t' BT. Begad! Blimey! Each launch lug was 3/16" diameter and 9/16" long. T' motor mount be glued into t' BT usin' wood glue that created a nice fillet around t' top centerin' ring. Begad! Blimey! Arrr! Blimey! A wood glue fillet was also created around t' bottom centerin' ring. Blimey! Blimey! Well, blow me down! Blimey! T' fins were cut from hard 3/16" balsa and shaped. Avast! Blimey! T' fin and launch lugs were glued on with epoxy. Avast, me proud beauty! Blimey! Once dry, me bucko, epoxy micro balloon fillets were created around t' fins and launch lugs. Arrr! Blimey!

Finishing:
T' fins and nose cone were sealed and hardened usin' two coats o' Minwax Polyurethane. Avast! Ahoy! Once dry they were sanded smooth and coated usin' thinned spackle that be brushed on t' fill t' wood grain. Begad! T' filler be sanded off and the rocket was primed with two coats o' Duplicote High Fill primer sandin' betwixt coats. Begad! Avast, me proud beauty! T' nose cone be painted black usin' two coats o' old formula Krylon spray. Blimey! Arrr! T' body be painted metallic red usin' two coats o' Rustoleum spray. Aye aye! Well, ya bilge rat, blow me down! Once dry t' body be smoothed usin' super fine steel wool. Once clean and dust free t' body be shot with two coats of Rustoleum clear. Avast! It was really cold durin' t' paintin' process for this rocket, but t' results were still acceptable. To finish t' model, ya bilge rat, ya bilge rat, t' decals were installed. Overall it looks fantastic.

(Scratch) Upscale Der Red Max

Flight:
I designed this model t' fly on t' 24mm reloads such as t' E18, ya bilge rat, E28, me hearties, F24, or F39. T' first flights I used a E28-4 and it worked perfectly. Avast, me proud beauty! Blimey! T' first boost be nice and straight with no stability issues. Aye aye! Blimey! T' E28 produced a very respectable altitude. Well, blow me down! Blimey! Avast! Blimey! Blimey! Blimey! T' 24" parachute worked good but a little too slow t' brin' it down. Ya scallywag! Blimey! Aye aye! Blimey! Blimey! Blimey! A smaller chute or a spill hole would be required for windy or high thermal activity days. Ya scallywag! Blimey! Blimey! Blimey!

Recovery:
Since t' fins on this upscale start t' get large, I would use t' through t' wall method next go around. Although I feel very good with me method t' attach fins and strengthen them with fillets, me bucko, TTW is king.

Summary:
This is a very easy rocket t' upscale but is a rewardin' project. Begad! T' Der Red Max is a classic that flies great up or downscaled. Ya scallywag! In addition you can't find a cooler set o' decals on a rocket anywhere.

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