blackwing94
Well-Known Member
- Joined
- Jan 5, 2016
- Messages
- 218
- Reaction score
- 178
Working on a MAC MPR38. I want a simple motor eject set up and use a JL chute release. I used rocksim to simulate several different motors and if I can adjust the nose cone weight I can compensate for different (as in bigger) motors. So I'm going to cut off the aft end of the plastic nose cone and epoxy a ring in the shoulder to attach a bulkhead. I plan to put an eyebolt in the bulkhead as my recovery harness attachment point. If I use an eye bolt that's 4 or 5 inches long, I can add/subtract washers/bolts to the part of the eye bolt inside the nose cone to adjust the weight as needed.
I read I'll have to add more weight in the shoulder to move the CG forward than if I had added the weight to the nose cone tip. Not a problem.
I could pour shot and epoxy into the nose cone tip or use 2 part foam. But then the weight is not easily adjustable.
I like that the recovery harness will be attached to the heaviest part of the nose cone. Also the nose cone wont come in ballistic if detached.
I'm thinking the nose cone will also free fall... not as ballistic, more draggy, while waiting for the chute release to open.
My question is, does it matter if weight is added to the tip of the nose cone or in the shoulder? Are there other down sides, aerodynamic or otherwise, to adding weight to the shoulder and leaving the tip hollow and light?
I read I'll have to add more weight in the shoulder to move the CG forward than if I had added the weight to the nose cone tip. Not a problem.
I could pour shot and epoxy into the nose cone tip or use 2 part foam. But then the weight is not easily adjustable.
I like that the recovery harness will be attached to the heaviest part of the nose cone. Also the nose cone wont come in ballistic if detached.
I'm thinking the nose cone will also free fall... not as ballistic, more draggy, while waiting for the chute release to open.
My question is, does it matter if weight is added to the tip of the nose cone or in the shoulder? Are there other down sides, aerodynamic or otherwise, to adding weight to the shoulder and leaving the tip hollow and light?
Last edited: