Lukun7
Young Rocketeer
On thrustcurve motor browser, I've noticed that the contrail and Gorilla Os are 152mm, and Cesaroni reloads are 161mm. Are these motors really the same diameter? And if not, which MMT size is used more and easier to find?
P-8000 does not use a motor tube. It is a single use motor made of carbon fiber.
Slightly shaped like a "bell" the front end has a steel ring with 1/4in bolt holes in it . Motor is bolted to a aluminum CR glued inside the airframe. Requires approximately 10in. diameter of space. Nozzle end about 9.5 in.
No other support, just the 6 bolts in front to CR which doubles as the thrust ring.
I have one in storage for my Sparrow-Arcus full scale.
P-8000 does not use a motor tube. It is a single use motor made of carbon fiber.
Slightly shaped like a "bell" the front end has a steel ring with 1/4in bolt holes in it . Motor is bolted to a aluminum CR glued inside the airframe. Requires approximately 10in. diameter of space. Nozzle end about 9.5 in.
No other support, just the 6 bolts in front to CR which doubles as the thrust ring.
I have one in storage for my Sparrow-Arcus full scale.
Yeah, that would be nice. Do you mean that by gluing it into your CR you are basically making the motor disposable? Or can you take out or reload the Carbon fiber motor casing?
You don't need a tube. Just cut enough rings.
A motormount tube within the airframe tube on smaller rockets is more rigid with less weight than stringers. For heavier/large rockets, plywood stringers give better lengthwise rigidity when that's more important than total weight. The centering rings give a more accurate way to center the motor than the stringers alone, and give additional strength.Why doesn't anyone do this on smaller rockets? I mean, it's nice and all to glue your fin tabs to a mmt tube but the same thing could be accomplished with a stringer between rings I guess...
Could you share pictures of the motor?
Reread Jim's response again. The motor is bolted to a CR which is glued into the airframe, the motor isn't glued to the airframe.Do you mean that by gluing it into your CR you are basically making the motor disposable?
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