I have a couple i could show you. Or I could take a picture. 1.5 to 2 inches i guess.

Hey Scott,

Motor hangs out 1.5 to 2" out of the casing? ok cool.
Do you also know about how deep the 1/4-20 hole is?
Thank you sir!

I was way wrong picture is split wierd but you can see the measurement.
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Thanks Scotte, looks like 5/8" to me. 😀

Guys, rather than using those big honkin' eyenuts, I have some hardpoint anchors in 1/4-20. They are identical to the anchors that came with the KestreL except the threaded core is 1/4-20 (same length, OD, cross-hole, etc.)

The 1/4-20 anchors are $4.50 ea. I think I have a half-dozen or so....

The KestreL doesn't have a whole lot of room in that area - that is why I made these anchors.

The 1/4-20 anchors are sold out 😯

I will have some more made in the future...

JW

The 1/4-20 anchors are sold out 😯

I will have some more made in the future...

JW

So....I guess its back to "using those big honkin' eyenuts" 😉

A guy could go down to ALRECO and get some bar stock and in 1/2 hour with a drill(drill press would be better) and tap make himself 1 or 10

Forgive my ignorance, but why not go to Ace Hardware and get a short 1/4-20 eyebolt, cut the threads to the length you want, put a jam nut on it and call it good. Would that not do the same thing and be pretty quick and in-expensive? If I am wrong, would someone please educate me.

Remember, if the women don't find you handsome, at least they will find you handy!

Yep - you could do that. There is some extra weight, and eyebolts tend to open up (seen it happen many times). You could, of course, weld it.

The advantages of the anchors are they are smaller and lighter. This particular area in a KestreL is way very, very tight - so something a bit more svelte is good. On larger rockets, you are right on (as long as you weld it shut)

There are a couple basic types of eyebolt: Wire, which has the bolt bent around in a circle and leaves a small open gap; and Forged, which has the eyebolt fabricated as one piece.

As JW said, the wire or open eyebolts are not reliable under a load, and can open up.

The forged eyebolts are load-rated, and are usually available at Ace in a plain steel or galvanized finish. If you want to get exotic, stainless steel forged eyebolts can be found, just don't faint away when you see the prices.

For 29mm and 38mm birds, I have long used "wire" eye bolts or screws. What I do is weld the loop closed with my little tiny 125A wire-feed welder. Takes 5 seconds to do the weld, and 2 hours to clear a space, set it up, do the job and tear it down... Ya gotta love rocketry - profit is NOT the motive.

I found the cast eyes on-line with a price of about $11 for a pack of 10 with a 1/4-20 thread; so I get a piece of all thread, cut it to length, clean the threads, screw it into the eye with some locktite applied, and then screw it into the top of the motor with a jam nut in there to make sure it remains tight until I am ready to take it out. Will that work?

Remember, if the women don't find you handsome, at least they will find you handy!

Hey,
That is about what I'm thinking too, Bear. The jam nut might be a little tricky though, there will be a bulkhead in the way, but I would like to think i won't need it. That is a smoking deal you found on eyenuts!

For 29mm and 38mm birds, I have long used "wire" eye bolts or screws. What I do is weld the loop closed with my little tiny 125A wire-feed welder. Takes 5 seconds to do the weld, and 2 hours to clear a space, set it up, do the job and tear it down... Ya gotta love rocketry - profit is NOT the motive.

Warren, you are right--for small rockets such as 29 and 38, the wire eyes will work OK. I wouldn't use them in anything larger, though.