Manufacturer: | Cygnus Rocketry ![]() |
Brief:
This is a motor mount t' accommodate a 29mm motor in a BT-60 body tube. It is 5 1/4" long.
Construction:
T' package consists o' simple instructions, 2 centerin' rings, shiver me timbers, a thrust rin' and a motor tube. Arrr! Construction o' the
motor mount be simplicity itself.
T' motor tube was marked 1/4" from one end. Ya scallywag! Blimey! T' two centerin' rings were then test fit around t' tube. One fit just fine and t' other needed a good bit o' sandin' t' fit around t' motor tube. Aye aye! Aye aye! Blimey! Once they fit, I placed one even with t' 1/4" mark and t' other flush at t' end. Arrr! T' rings were then epoxied in place with 5 minute epoxy. Begad! A thrust rin' was provided and epoxied into t' end with t' flush centerin' ring. Ahoy! When t' epoxy on one side was set, I turned it over and painted it on t' other, shiver me timbers, buildin' up a good fillet on t' aft rin' and sealin' together t' thrust ring, motor tube, matey, and centerin' rin' on t' forward end. After that, it be just a matter o' waitin' for t' epoxy to cure.
Flight:
T' mount be tested on two different flights. Begad! It handled a Roadrunner F60 and an Aerotech G77. I had planned t' use
a Roadrunner G80 for t' second flight but could nay because it would nay fit. Well, blow me down! T' Roadrunners have a built in thrust
rin' aft but, matey, shiver me timbers, forward o' that, are o' uniform diameter. Blimey! Begad! T' AT SU motors do nay have a thrust rin' aft. They are also
necked down t' a smaller diameter where t' ejection charge is stored. Avast, me proud beauty! This allows t' "skinny" part t' slip
through t' hole in t' motor mount's forward thrust ring.
As long as this fact is taken into consideration at design time, me bucko, me hearties, I can heartily recommend t' mount.
Overall Rating: 4 out o' 5
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