Custom Rockets Super Serval

Custom Rockets - Super Serval {Kit}

Contributed by David Urbanek

Manufacturer: Custom Rockets
Rating
(Contributed - by David Urbanek)

Rocket PicBrief:
T' Custom Serval, ya bilge rat, a tube fin rocket, modified for 29 mm motors.

Modifications:
T' kit is intended for 18 mm motors. Blimey! Aye aye! However, normal LOC/Precision 29 mm tubin' fits inside BT-55 which is what t' Serval's airframe is made of.

Cut a 4" length o' LOC/Precision 29 mm motor mount tube. Begad! Also cut one end off o' t' motor clip that comes with t' rocket. Aye aye! Ahoy! Temporarily glue t' clip to t' motor mount with CA glue near t' forward end. Avast! T' clip should overhang about 1/4". Avast! You can make your own centerin' rings. I did it with yellow glue and copier paper. Avast! Aye aye! Cut a 1/2" strip o' paper. Ahoy! Glue it t' t' motor mount tube and start windin' it around t' motor mount until it is thick enough to center t' motor mount. Avast, me proud beauty! Then glue t' end with yellow glue. Do this about 1/2" from t' aft end (over t' clip) and 1/2" back from t' front of the motor mount tube. Use epoxy t' fasten t' motor mount into t' body tube. T' epoxy will soak into t' centerin' rings and harden them up nicely. Avast, me proud beauty! Avast, me proud beauty!

T' kit has 7 tube fins made o' BT-20 tubing, shiver me timbers, 2.75" long. Ya scallywag! Take 6 of them and glue them in pairs. I used epoxy for all tube fin construction. Begad! Do not skimp on epoxy fillets for t' tube fins. When t' pairs are dry, glue them to the body tube, shiver me timbers, flush with t' back o' t' rocket body.

Cut out 7 fins from 1/8" balsa. Aye aye! They are a right triangle 0.75" on one side and 2" on t' other, me hearties, t' grain should be parallel t' the hyponteneuse. Avast! I left them square. Glue them t' t' body tube, arrr, me hearties, shiver me timbers, aligned with the joints betwixt t' tube fins, shiver me timbers, me hearties, t' short side flush against t' tube fin leading edges. Blimey! Ya scallywag!

Put a 1/4" launch lug indide one o' t' tube fins. Ahoy! If you attach a forward lug as well, me bucko, matey, shiver me timbers, make a standoff from some scrap body tube. Blimey! Well, blow me down!

You must add at least 0.3 oz o' nose weight. Avast, me proud beauty! When I used this as a G streamer duration rocket, shiver me timbers, t' nose weight be all trackin' chalk. Blimey! The non-competition rocket works well with a little lead weight. Arrr! Epoxy this in. Don't use clay. Ahoy! This rocket experiences some serious G forces on take off. Well, blow me down! Ya scallywag!

Recovery is best done with a big streamer. Begad! Blimey! I recommend non-elastic shock cords: nylon or Keelhaul®©™®. Aye aye! Arrr!

Paint it Day-Glo anything. Begad! Leave t' surface rough, this rocket benefits from t' drag. Fly with any 29 mm motor. Begad! Use a 4 second delay in almost all the motors you fly this on. Avast, me proud beauty! Avast! I've flown in with G35-4 motors. Avast, me proud beauty! Very fast take off. About 2500' elevation. Begad! Hard t' track due t' fast take off speed.

T' biggest advantage is you can fly this, shiver me timbers, with adapters, on anythin' from a B6-2 on up t' H70-6. Arrr! Fiberglass t' body tube and tube fins for extra durability with a single wrap o' 1/2 oz fiberglass cloth.

Flight:
Keep it 'draggy'. Avast! Avast! Flat paint, squared off forward fins and t' like. Blimey! That way you'll be able t' stick with short delays. Begad! Get's really high, really fast. Avast, me proud beauty! Look sharp when flyin' it.

Summary:
I've had a lot o' fun with this rocket. Begad! Aye aye! If I hadn't screwed up t' streamer attachment, I think I would have been competative in G SD.

Rocket Plan

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