05-22-2015, 12:02 PM
|
 |
Dazed and Confused
|
|
Join Date: Mar 2005
Location: TN
Posts: 11,624
|
|
Quote:
|
Originally Posted by mikemech
I'm building a rear ejection rocket, 24mm MMT in a BT-80 airframe. The motor tube is 300mm long and the airframe tube is 310mm long. The front of the motor tube butts against a bulkhead. The front centering ring is 30mm from the front of the motor tube.
I need to find out if the ejection charges on LPR BP motors are all the same. During ejection testing do I need to use 24mm motors or can I use far cheaper A8-3s?
Also posted in TRF.
|
They aren't the same. In fact, you can take 10 motors of the same designation, such as a D12-5 and have anything from a light ejection to a shotgun ejection. We'd like them to be consistent and so would Estes, but they aren't. I've had 13mm motors blow out body tubes and 24mm motors not even blow half the clay off.
__________________
I love sanding. 
|