- Joined
- Jan 26, 2021
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Hello everyone!
I am in the process of building a 38mm minimum diameter rocket and I was stuck for a while trying to figure out how I was going to retain the motor. I was doing some reading on here a while ago and someone mentioned using pipe expansion plugs but I couldn't find the thread again when it was time to actually get to it. All of this to say I can't take full credit but I don't know who to give credit to.
I used the following
OATEY 33400 X2
5/16 x 3.25" Eye bolt X1
5/16 Washers X2
I dismantled the two plugs and reassembled on the eyebolt using only the two smaller plastic disks and the rubber expansion seal. I added the two washers to set the distance to allow for enough thread to expand when the motor is twisted.
It works quite well in what I have. I can just slide it in and twist the motor and it locks into place. This also allows for using any length of motor case and stuck because you don't have a retainer epoxied in the airframe. This is the solution I've been looking for a while to find.
I made a video about this and have it posted on YouTube
I am in the process of building a 38mm minimum diameter rocket and I was stuck for a while trying to figure out how I was going to retain the motor. I was doing some reading on here a while ago and someone mentioned using pipe expansion plugs but I couldn't find the thread again when it was time to actually get to it. All of this to say I can't take full credit but I don't know who to give credit to.
I used the following
OATEY 33400 X2
5/16 x 3.25" Eye bolt X1
5/16 Washers X2
I dismantled the two plugs and reassembled on the eyebolt using only the two smaller plastic disks and the rubber expansion seal. I added the two washers to set the distance to allow for enough thread to expand when the motor is twisted.
It works quite well in what I have. I can just slide it in and twist the motor and it locks into place. This also allows for using any length of motor case and stuck because you don't have a retainer epoxied in the airframe. This is the solution I've been looking for a while to find.
I made a video about this and have it posted on YouTube