Exactimator
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- Feb 16, 2014
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Im working on assembling the motor mount for the Reaper 3. It has a 54mm motor mount and 6 fins. With the 6 fins, theres not a lot of room to epoxy the Kevlar to the sides of the MMT without it getting in the way of the fin roots.
Its a 3 kit, so the centering rings are too thin to drill and install an eyebolt or U-bolt.
I can see two ways to attach the Kevlar strap to the booster section of the rocket:
1. Theres some exposed length of the MMT forward of the fins (a couple of inches). Its enough to epoxy some strap to. I could wrap the Kevlar around the forward end and epoxy, instead of running through the centering ring and down the sides. Only problem I see here is the strap will be coming off the MMT at an angle, creating a stress point.
2. I could epoxy the strap to the inside of the body tube above the motor mount and below the coupler. This is the system in the Madcow instructions for their 2.6 FG Nike Smoke.
Does anyone have any advice on either of the above? Or another idea that would work?
Its a 3 kit, so the centering rings are too thin to drill and install an eyebolt or U-bolt.
I can see two ways to attach the Kevlar strap to the booster section of the rocket:
1. Theres some exposed length of the MMT forward of the fins (a couple of inches). Its enough to epoxy some strap to. I could wrap the Kevlar around the forward end and epoxy, instead of running through the centering ring and down the sides. Only problem I see here is the strap will be coming off the MMT at an angle, creating a stress point.
2. I could epoxy the strap to the inside of the body tube above the motor mount and below the coupler. This is the system in the Madcow instructions for their 2.6 FG Nike Smoke.
Does anyone have any advice on either of the above? Or another idea that would work?