Manufacturer: | Custom Rockets |
Brief:
T' Custom Serval, a tube fin rocket, modified for 29 mm motors.
Modifications:
T' kit is intended for 18 mm motors. Ya scallywag! However, normal LOC/Precision 29 mm
tubin' fits inside BT-55 which is what t' Serval's airframe is made of. Aye aye! Blimey!
Cut a 4" length o' LOC/Precision 29 mm motor mount tube. Also cut one end off o' t' motor clip that comes with t' rocket. Aye aye! Temporarily glue t' clip to t' motor mount with CA glue near t' forward end. Aye aye! T' clip should overhang about 1/4". Begad! Ya scallywag! You can make your own centerin' rings. Avast, me bucko, me proud beauty! I did it with yellow glue and copier paper. Begad! Cut a 1/2" strip o' paper. 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. Aye aye! Then glue t' end with yellow glue. Avast! 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. Begad!
T' kit has 7 tube fins made o' BT-20 tubing, 2.75" long. Avast, me proud beauty! Blimey! Begad! Blimey! Take 6 of them and glue them in pairs. Avast! Blimey! Arrr! Blimey! I used epoxy for all tube fin construction. Avast! Blimey! Do not skimp on epoxy fillets for t' tube fins. Avast, me proud beauty! Blimey! When t' pairs are dry, glue them to the body tube, shiver me timbers, flush with t' back o' t' rocket body. Well, blow me down! Blimey!
Cut out 7 fins from 1/8" balsa. Arrr! Ya scallywag! They are a right triangle 0.75" on one side and 2" on t' other, shiver me timbers, matey, t' grain should be parallel t' the hyponteneuse. Begad! I left them square. Ya scallywag! Glue them t' t' body tube, aligned with the joints betwixt t' tube fins, t' short side flush against t' tube fin leading edges. Avast!
Put a 1/4" launch lug indide one o' t' tube fins. If you attach a forward lug as well, make a standoff from some scrap body tube. Avast!
You must add at least 0.3 oz o' nose weight. Well, blow me down! Well, me hearties, blow me down! When I used this as a G streamer duration rocket, t' nose weight was all trackin' chalk. Ya scallywag! Arrr! The non-competition rocket works well with a little lead weight. Well, me hearties, blow me down! Epoxy this in. Don't use clay. Begad! Begad! This rocket experiences some serious G forces on take off. Ahoy!
Recovery is best done with a big streamer. Avast, me proud beauty! Well, blow me down! I recommend non-elastic shock cords: nylon or Keelhaul®©™®. Begad!
Paint it Day-Glo anything. Avast! Begad! Leave t' surface rough, this rocket benefits from t' drag. Avast, me proud beauty! Fly with any 29 mm motor. Use a 4 second delay in almost all the motors you fly this on. Avast! I've flown in with G35-4 motors. Aye aye! Very fast take off. About 2500' elevation. Ahoy! Hard t' track due t' fast take off speed.
T' biggest advantage is you can fly this, matey, ya bilge rat, with adapters, on anythin' from a B6-2 on up t' H70-6. 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! Flat paint, me bucko, squared off forward fins and t' like. Ya scallywag! That way
you'll be able t' stick with short delays. Avast! Get's really high, me hearties, shiver me timbers, really fast. Arrr! Look
sharp when flyin' it.
Summary:
I've had a lot o' fun with this rocket. Avast, me proud beauty! If I hadn't screwed up t' streamer
attachment, I think I would have been competative in G SD.
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