How do you keep in a high power motor in its mount, but still alow for the numerous lengths in which HPR motors are sold?
From: billn@hpcvaac.cv.hp.com (Bill Nelson) I make a clip similar to the ones used on model rockets – however, I do not pierce the motor mount tube – I place the front end of the retainer over the front of the tube. It is epoxied/taped in place, just like with a model rocket. I do not rely on spring pressure to hold the clip over the end of the engine. I use several turns of strapping tape – wrapped around the engine or motor mount and the retainer clip. So far, I have never had a problem with an ejected engine. From: JCook@Epoch.COM (Jim Cook) Some folks at NARAM 33 suggested drilling a small hole in the side of the flange of the rear nozzle retaining ring [of an ISP reloadable motor casing] to tie the casing to the model. Some might claim this to be “modification of rocket motors not approved by the mfg.” I had though I heard Aerotech was going to start doing this themselves, but I haven’t seen anything yet. From: neil@boi.hp.com (Neil Pyke) I’ve built #8-32 “t-nuts” into my last cou
