Two Mustangs

My project to modify my mustang rocket has gotten more complicated.  In my original attempt to modify the rocket I broke some things.  It was really hard modifying things inside the tube with everything already glued together.  So I bought another Mustang kit to complete the project.  But then I realized that with some of the parts from the new kit that I wasn’t going to need, I could rework the original rocket as well.  So I’m winding up making two rockets.

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The bottom one is an original size mustang, but with the engine mount extended to fit up to 6 grain motors.  That’s now all done except for painting, and it’s the one I will use for my level one certification flight.

The top two tubes fit together to make a stretched version that can hold up to 27″ long motors and will be dual-deployment.  For that one, the engine-mount/fin can section is done, but I still have to make the e-bay in the recovery section.  I won’t be able to use that one for my level two certification because there aren’t any certified J motors in 29mm size, but after I get my level two certification with another rocket, I know someone who is working on an experimental hybrid motor who thinks he can fit J impulse into a 29mm x 27″ long motor.

I haven’t checked these new designs for stability yet, but if necessary I will add modelling clay to the hollow plastic nose cones.

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Stretched Mustang

For my L1 certification flight I have a Mustang model that I am modding to a stretched version that can take longer motors.  The Cesaroni Pro-29 3-grain case (pictured) has some H size reloads.0615161337

The Mustang model is from AeroTech.  It uses a 1.9″ body tube, which doesn’t appear to be a common size.  In fact, AeroTech models are the only ones I’ve found that use 1.9″.  I found places where I could order the body tube and coupler, but the problem was getting the centering rings.  The only off-the-shelf way that I could find to order the centering rings was as part of a combined motor mount/Fin-Lok™ Kit.  I already have fins and I wanted more than the two centering rings that come in a kit so I would have had to order multiple kits.

In the end, I found a place called Balsa Machining Service in Pahrump, Nevada that had the 1.9″ body tube and coupler and was willing to cut some centering rings for me on their laser cutter.  I was really happy with their service.  I got 100 centering rings cut so if anyone needs a centering ring for a 29mm motor mount tube in a 1.9″ body tube I can give you some.