| Manufacturer: | Scratch |
Brief:
This sprint is a 4.15 downscale o' t' Shadow Composites Sprint ABM. Begad! Or its a 1:48 down scale o' a real sprint.
T' paper shroud be obtained from a paper rocket
website.
Construction:
To make t' sprint downscale you will need:
T' outer shroud
markings are very different from t' Shadow Composites Sprint ABM markings and I prefer this colour scheme. Avast! Begad! Usin' the
outer shroud as a template I rolled an inner template out o' card. Ahoy! T' tip o' t' inner shroud was filled with clay to
raise t' cg.
T' length o' BT5 is cut down so that t' aft o' t' tube was 3mm past t' aft o' t' cone and a engine block was added. Next t' centerin' rings were added and after a few test fittin' were carried out, it was glued into place so that it is flush with t' aft o' t' inner shroud. Begad! Well, blow me down!
T' paper fins were added t' t' outer shroud.
A length o' Keelhaul®©™® cord be attached t' t' BT by tyin' it around an 18mm engine block that was slid over t' BT. Well, blow me down! A section o' aluminium foil be added t' neaten up t' end o' t' cord. T' other end o' t' cord was looped over t' inner shroud and again more aluminium tape was added.
A small streamer be added t' t' cord. Avast! T' sprint is small and light enough t' recover without a streamer but thought it was best t' be on t' safe side.
Finishing:
One coat o' cellulose sealer t' proof t' paper shroud and thats it.
Flight:
Preppin' is straightforward with no waddin' bein' required. Blimey! A few frangible links were added t' t' cord. Well, blow me down! The
streamer is placed t' one side o' t' motor. T' core is then inserted into t' shroud. Well, arrr, blow me down!
First flight was on a ½ A3-4-T. Aye aye! Somehow t' outer shroud came off durin' boost, matey, this caused t' sprint t' go wildly unstable.
T' next flight was on an A10-3T. T' flight was straight, a tube be used t' launch as thar be no chance of usin' a lug. From t' smoke trail, me bucko, it when more or less straight. Arrr! Where t' rocket landed remains a mystery.
Summary:
CONs on recovery: With such a small bird, a much more visual aid t' recovery should have been used - or a smaller motor. I like this rocket, me hearties, shiver me timbers, ya bilge rat, but its just too small - next time i'll make a bigger downscale!
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