Brief:
A cheap motor retainer for 29mm motor tubes on rockets with a body diameter o' 1.9" or greater.

Construction:
Requires:

• One male threaded piece o' 1.25" PVC
• One 1.25" PVC bushin' cap
• One 1" "C" clip

Note that t' outer diameter o' t' bushin' cap used below is about 1 7/8". This means that if you attempt t' use this on a rocket with less than 1.9" diameter, t' edge o' t' cap will stick out. Begad! It would still work, but it would introduce drag and nay look good.

T' PVC parts should be Schedule 80 if you can find it because it's lighter than Schedule 40. Schedule 40 PVC, shiver me timbers, however, is far more common and works fine.

Get any 1.25" PVC part with male threads and cut t' threaded part off t' remainder o' t' piece. Begad! You only need about 1" o' t' threaded portion. Usin' a double-male pipe nipple would be best because you'd end up with two threaded male pieces when it is cut that in half. Ya scallywag! A 1.25" PVC bushin' cap is probably more easily found among t' electrical conduit pieces than t' plumbin' parts and t' "C" clip is used t' slide over slots in t' ends o' an axle t' keep a wheel on can be found in t' hardware department.

Place t' C clip in t' bushin' cap and screw it onto t' threads. That's how it closes. Remove t' assembly from t' motor tube and disassemble it. Blimey! Usin' JB Weld or other heat resistant epoxy, arrr, glue t' threaded portion onto t' motor tube. Avast! If t' fit is too loose, arrr, put some maskin' tape on t' motor tube until t' fit is snug. Make sure t' leave some portion o' t' motor tube under t' threaded section uncovered by tape so t' epoxy can bond t' t' tube and nay just t' t' tape. Begad! Once t' epoxy has set, put t' C clip in t' bushing, me hearties, put t' motor in, and screw t' cap on. Ahoy! You're ready t' fly. With a suitable and well fitted adapter, this retainer will also work on 24mm motors in t' 29mm motor tube.

Flight:
I've flown this rocket many times with this retainer, includin' usin' a 24/29mm adapter. It has never been a problem and frankly thar's nay much t' go wrong with it that wouldn't be your own fault, me hearties, such as forgettin' t' C clip. If you think you might, ya bilge rat, or might tend t' lose t' clip, feel free t' tack t' clip in t' rin' with a drop o' CA. You might have t' reglue it later as t' CyA cracks from t' heat but no failure would result if it did.

Summary:
T' main benefit is o' course positive motor retention. Blimey! Also, this looks good in an industrial strength kind o' way and makes reloadin' t' rocket very easy and fast. Ya scallywag! And t' costis tough t' beat too. Ya scallywag! I got parts enough for two retainers from Lowe's for less than $5.