3/8" lifting eye?

More questions, diving into this as the noob: Has anyone ever seen a front closure unthread from the casing due to recovery harness attachment? It’s pretty straightforward to put a jamnut between the eyebolt and closure, but what about the closure itself?

And then, on the bay, if you have multiple rods with eyenuts, how do you do the multiple attachment with your harness? Or do you just attach to one?

My next build will be zipperless with room for an “all motor” booster section, so I’m still debating the attachment. With the long motor, it’s obvious to use the eyebolt in closure. But with the short motors, you’re back to a regular zipper-prone configuration. Ideas?

Ken

Well, I cant say Ive ever seen that happen. I dont fly to many threaded closures much, as most of what I do is all snap ring stuff. But I bet it would be pretty hard to do.. John Wilke has flown many AT cases in that mannor. (Tony A. Has flown his like that many times all the way to 35K in altitude without an issue.) Im also pretty sure that if that was an issue Manufactures wouldnt make them for that purpose… I think I will shoot an email To RouseTech and see what they say… Makes me curious.

With Multiple rods Ive used a Y harness that I made or you can do 2 full length shock cords. I used 2 Y harnesses on my L3 rocket Full Throttle on both the Apogee and Mains. Works very well and plent strong.

As far as Zipperless… What you are describing is not zipperless. having an open end with the motor attached to the harness doesnt make it zipperless design. True zipperless is not even what it says it is. In fact its kind of a poor name as it still can zipper but is alot less of a chance that it will. Most of the time the booster never is the zipper issue. Its the body tubes above that. But in true ziperless deployment what makes the booster zipperless is that you will have a coupler installed in the booster glued in place making the top of the booster double wall and much harder to zipper. as well as the way that the body tubes will now contact the harness it makes the apogee deployment less likley to zipper. Hope that makes some sense… The motor length wont make a difference. The contact point on a zipper is at the top of the tube where the harness exits and again thats double wall via a coupler stick out. You might damage the coupler but it probably would stop at the double wall.

the booster long enough for 29″ of motor. I think that should cover all (non-hybrid) cases commercially available.

Thanks,
Ken

Maybe…… 😉 I keep hearing of some new stuff…. Can you say MUCH longer motors possibly/probably on the way… 😀

Adrian,

Regarding the #6 eye nut request- head to the hobby store. I’ve made a couple small simple ebays using a RC Plane wheel collet for the eye nut.

I usually add a locking nut as well, just to make sure it does not back off during the often winding descent.

True JW that many times it is unavoidable especially with minimum diameter rockets. You have to use they eyebolts and it sounds like you are taking appropriate precautions. But I have seen them un-thread and since I have the room in my rockets, I prefer the U-bolts. As far as a U-bolt pulling through a bulkplate is a failure of the bulkplate and not the U-bolt. Of course for my last couple of projects my bulkplate the U-bolt runs though is 1/4 inch thick aluminum…

Doug

Lets just hope it gets done in time for MHM.

Doug