user 35280
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Also the AT SU F20-, F23-, F27-, F42- Econojet motors
The standard length 29mm version with a reasonable finish should weigh under a pound - probably close to 12 ounces - which should allow any Aerotech F or G single use 29mm motor plus a bunch of reloads. On a still day off a launch rail you could do a 300 ft “school yard” flight over an adapted Estes BP E12, so just about any Aerotech single use 24mm E and up should work. Oddly, the big Estes 29mm BP motors are probably a bit too heavy for the available thrust - Thrustcurve shows it a bit too slow off the rod.
For fun, low but high enough to be interesting flights the 24mm Aerotech E20-4W would be a good choice - no hazmat shipping and discount price of around $21 for a two pack. With the additional payload bay you’d probably need a little more oomph - Aerotech Economax F44-4W should work. The Estes #9753 24/29 Adapters work great with both “rimless” BP motors and AT motors with integral thrust rings.
What 29mm motor retainer did you use?The parts. Hardware bag even included a nice swivel. First time I've seen that. Loooooong tube...
I built the motor mount last night before thinking I'd do a thread on this. Details on that next.
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I 3D print my own.What 29mm motor retainer did you use?
How could I get one? Recomend one I can buy? I do not have a 3D printer.I 3D print my own.
Do you have any experience with Rocketry?How could I get one? Recomend one I can buy? I do not have a 3D printer.
Just a little from years ago with just Low power rockets. Never used a motor retainer like this, always just had the simple motor retainer like the one they use on the 24mm kitDo you have any experience with Rocketry?
If you can't print your own, just buy from Estes, $8.99 for TWO.. can't beat that price. https://estesrockets.com/product/009750-pro-series-ii-29-mm-motor-retainer-set/How could I get one? Recomend one I can buy? I do not have a 3D printer.
Edited.I've launched my 24mm 3" school rocket on the Estes E12-4 BP motor twice and it was marginal at best. Both launches veered badly as soon as it left the launch pad rod. Have launched it with E20 and F44 motors for great launches and recoveries.
Yes I know the doorknob comes with that, the Motor retainer would be for the 29mm school rocket, I will end up getting both at some point.If you’re interested in getting the Estes Doorknob Rocket here’s the instructions, https://estesrockets.com/wp-content/uploads/Instructions/009720_DOORKNOB.pdf
Look them over it shows what all comes with the kit. It comes with a nice 29mm screw-type motor retainer.
If you can't print your own, just buy from Estes, $8.99 for TWO.. can't beat that price. https://estesrockets.com/product/009750-pro-series-ii-29-mm-motor-retainer-set/
There's no payload bay. Nothing in there. It's just extra length body tube. I did it because I liked the look of it more and I already have a short 29mm rocket.Thank you, What did you put in the extended bay? Did you make it into a ebay? Use some kind of eletronics to help deploy the parachutes? Sorry for all the questions. Trying to absorb all the information I can find.
What size parachute for a rocket that size? Would the same size also work on the doorknob? Like someone else said about sharing parachutes between rockets with a quick release.There's no payload bay. Nothing in there. It's just extra length body tube. I did it because I liked the look of it more and I already have a short 29mm rocket.
I just use a chute release also on most F+ flights.
LOC Micro Magg:
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Size of the rocket doesn't matter. It's the weight that matters. This School Rocket is only about a pound. I think I used a large plastic Estes chute, or a nylon with no spill, probably 18", both on low chute release.What size parachute for a rocket that size? Would the same size also work on the doorknob? Like someone else said about sharing parachutes between rockets with a quick release.
Perfect looks like the doorknob also comes with a 18" parachute and says it weights 10 ounces. Of course I am doing the 29mm upgrade kit to it. Will make sure to weigh it when complete but how much more could it gain from better fins.Size of the rocket doesn't matter. It's the weight that matters. This School Rocket is only about a pound. I think I used a large plastic Estes chute, or a nylon with no spill, probably 18", both on low chute release.
I see you really are new here.So I should be able to share parachutes between at least two rockets.
Do you use some sort of release system for the parachute that releases the parachute at a set height when coming down
If you're really new to rocketry, why are you upgrading to 29mm right from the start?Perfect looks like the doorknob also comes with a 18" parachute and says it weights 10 ounces. Of course I am doing the 29mm upgrade kit to it. Will make sure to weigh it when complete but how much more could it gain from better fins.
Yes I am rather new but I have done a number of LPR rockets in the past. Think might start with https://www.mach1rocketry.com/bt20-rockets , Either the BT20 or 50. Rather inexpensive and can use the smaller motors. Guess I wanted to fly something that you have to build the motor mount setup instead of all being the same tube. Thanks for answering my questions.If you're really new to rocketry, why are you upgrading to 29mm right from the start?
A lot of the questions you're asking here could be answered by yourself with just a few actual flights.
Why not just go buy, build and fly any good 24mm (D,E) kit. You will gain lots more knowledge on your own than we can impart to you on the forums. After you fly that a few times, you will have a much better idea of what you want to do with a higher-flying 29mm rocket.
In that case, just get a 2" or 2.6" diameter rocket.Guess I wanted to fly something that you have to build the motor mount setup instead of all being the same tube.
What kits would fit that bill or what company should I look at. I had just been looking at Mach 1, Just not sure what fits that size and never built a fiberglass rocket before.In that case, just get a 2" or 2.6" diameter rocket.
Did you use the whole extension for the 29mm School Rocket?I flew my extended 29mm MM school rocket on an Aerotech F39T with 6sec delay (24/40 reload in an Estes adapter) to about 800 feet and 19m/s off a 6 foot 1010 rail. Great first flight.
For single use F42T, F67W (as used above), F44W, F52C and more would fly well.
Run sims in Open Rocket to get idea of Rail speed and apogee.
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