Update: altimeter secured!
It’s a perfectflite MAWD, and I also got the usb cable! So I’m exited about that
It’s a perfectflite MAWD, and I also got the usb cable! So I’m exited about that
Go ahead and get the J270, build that L2 rocket, use motor ejection, simple, it's done everywhere, most weekends, keep progressing at least to the L2 level. Come down to Dalzell on the 6th.I'm starting too second guess my L2, and I think i'll just buy more H and I motors and casings. But i'll still do my L1 in a few weeks, so I should let Ken know that I no-longer need that J270.
But I have big plans for this project still
I already let Ken know I didn’t need the 270, but I’m still coming down on the 6th for my L1. (So save me a spot)Go ahead and get the J270, build that L2 rocket, use motor ejection, simple, it's done everywhere, most weekends, keep progressing at least to the L2 level. Come down to Dalzell on the 6th.
That was a great report, and I wish you well on the next flight.Plan:
Add new upper coupler, permanently downsize to 29mm MMT.
You’re probably right, I think you said the aero pack ones were good. So I think I’ll pick one up. My only concern was the damage to the MMT, but as you and others said, it would probably be fine if the mmt had a hole in it.That was a great report, and I wish you well on the next flight.
I would like to encourage you to go with a 38mm motor mount because a rocket that size would really benefit from it. There are many adapters that work perfectly fine, including Loc adapters, which I use all the time. I understand you had a bad experience this time but don’t let that turn you off of using adapters. They are a fantastic way to have a flexible rocket system, especially since you already have multiple nose cones for dialing in stability, an ebay for dual deploy and extra body tube sections to extend the length - I PROMISE you will wish you had a 38mm mount sometime in the future.
You’re probably right, I think you said the aero pack ones were good
I seem to have this same issue way more than I care to admit.This is why we make test pieces!View attachment 561188
Fin tab was too short
Agreed about changing the attachment point, but I do the reverse and put the fin section closer to the chute than the nose. When the chute deploys, the forward section will eject forward of the parachute until it hits the end of its cord. The rear section will continue to fly past the parachute until it hits the end of its own cord. If the nose stops relative to the chute before the fin section does, you risk a collision that's impossible if the fin section stops before the nose does (assuming the shock cord isn't especially elastic).Only change I would suggest is move the attachment point of the parachute closer to the nosecone. General consensus is the chute should be attached about 1/3 the shock cord length down from the nose (2/3 above the main portion of the rocket. this helps to ensure the parachute gets pulled out, while ensuring the nose cone doesn't slam into the rest of the rocket.
Good job!
Only change I would suggest is move the attachment point of the parachute closer to the nosecone. General consensus is the chute should be attached about 1/3 the shock cord length down from the nose (2/3 above the main portion of the rocket. this helps to ensure the parachute gets pulled out, while ensuring the nose cone doesn't slam into the rest of the rocket.
At the same time, I can understand that you might not want to change anything as it worked the last time.
Again, Good job on the L1 flight!!
I agree with you both, and the first thing I did when I got home that night was actually moving the attachment point much closer to the NC/Payload. That mainly happened by accident/very tired me the night before didn’t catch that when I was tying up the cords and stuff.Agreed about changing the attachment point, but I do the reverse and put the fin section closer to the chute than the nose. When the chute deploys, the forward section will eject forward of the parachute until it hits the end of its cord. The rear section will continue to fly past the parachute until it hits the end of its own cord. If the nose stops relative to the chute before the fin section does, you risk a collision that's impossible if the fin section stops before the nose does (assuming the shock cord isn't especially elastic).
For very small, light cones, I do sometimes put them close to the chute (usually very close in that case), but for heavier cones or payload sections or forward bodies in a drogue deployment, I give the forward section the longer cord. Under drogue it's of course always possible the fin section will fly in and hit something, but that's probably with a little less violence than a full speed fin can smashing into a nose that just slowed dramatically (and also probably a sign it's time to try a slightly larger drogue).
Of course legions of people have had success doing the way you mention, so I mention the above method only as an alternative that has some advantages, and certainly not as the only way to do things. There are usually a half-dozen ways to do anything in rocketry, and nearly all of them work so long as they're done well.
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