Cmac
Well-Known Member
Thank you for that info.Yes, the motor codes are explained in depth at Apogee's website
I've scoured their website for the motor code explanation. Are you able to link it for me?
Thank you for that info.Yes, the motor codes are explained in depth at Apogee's website
Yes, I see that now. Thank you.If you go to that Apogee link I listed, in the middle of the chart it will give what those letters stand for. ie W = White Lightning
T= Blue thunder
FJ = Black Max
Each one is a different type of propellant, White Lightning, Load roar and thick white smoke trail.
Not sure what you mean by "step up" from reloads, but I'll take a stab at it.This may need to be a new thread but I'll just touch on it here if you don't mind.
Ah yes, that's right. See what I mean!? I need to be taking baby steps!
What I meant by "composite" is the step up from reloads. What are they called?
Thank you for that info.
I've scoured their website for the motor code explanation. Are you able to link it for me?
Seconded!Thanks Nyt, I was looking for that and could not find it.
Ha ha... You mean like my Estes Big Daddy!?take your fav mid power rocket and put an H128 in it..
Thank you for the great info.Not sure what you mean by "step up" from reloads, but I'll take a stab at it.
"Composite" is not how the motor is put together--it's the propellant. Estes motors use black powder, but Aerotech and Cesaroni et al use a rubbery composite made of APCP: https://en.wikipedia.org/wiki/Ammonium_perchlorate_composite_propellant
You can buy single-use motors, which are one and done, or you can buy a case and put reloads into it. In between is a LMS, which is in between: you assemble the motor parts, but it's essentially a single-use motor. It's cheaper and gets around HAZMAT charges.
For simplicity, I'd stick with a single-use motor. One thing that is different is the range. Most Estes black powders are essentially at the top of their power scale, but when you get to larger motors, there's more room for variation. So you can get H motors from 161 Newtons all the way up to 320 Newtons.
So try to find an H motor that's a single use, at the lower end of the power scale for Hs.
Sounds like an impedance mismatch here, nevermind.Well... I don't own a Leviathan.
I'm not looking to find limits.
Yup.Sounds like an impedance mismatch here...
Thank you! I'll take that.The secret of L1: There really isn't one way to do it.
Have fun! Make a flight that you want.
A lot of H motors aren't much more stress than a G80. If you can fly and recover a rocket on that, you can do L1 real easy.
Or if you want to try something new and challenging, there are punchy Warp-9 motors and I motors.
Cardboard and plywood can take a real load and come out just fine. Due to the lack of material data around, it's easy to overbuild, but the more you spend time with the materials, the more you get a feel for what they can handle.
Why doesn't this forum have stickies like other hobby forums?I have a brief guide for certification, including selecting a rocket and a motor, that I use for my students. It's here: <https://pages.hmc.edu/spjut/AdvRoc/RocketryCertification.md.html>.
Why doesn't this forum have stickies like other hobby forums?
This should be a sticky!
I have it bookmarked into my "Certification" folder now.
I'll scour it tonight. Thank you!
You might consider picking up a copy of this book. It will probably answer a lot of questions. It really helped me.
https://www.abebooks.com/servlet/BookDetailsPL?bi=22656877448&cm_sp=snippet-_-srp1-_-tile1&searchurl=sortby=17&tn=Make+high+power+rockets
I've already or will be taking every bit of this great advice, thank you.As someone who recently went through this same journey...
Huh, yeah. I was planning on doing just that. At our local 1000' sq ft soccer fields. Surrounded by trees and playground.Don't know your field but if there are any hazards, trees, ponds, etc. I don't recommend a test flight with a G.
IIRC... Tim has you tie in the shock cord... I'd recommend against that. If you ever need to replace it, or even want to inspect it, it'll be... Difficult at best. Instead, I'd recommend that you learn to tie the Bowline knot (if you don't know it already), and slip the loop over the line to make it easier to remove/inspect. Or use my U-Loop Method... Don't forget to sleeve the shock cord either.I also noticed that Apogee was the only source for much of any product and construction info for the few of our other choices they sold on the list as well.
THIS IS NOT a knock on the other vendors. Not at all. It's just that I can tell that they may be used to dealing with more sophisticated and experienced builders that don't need the hand-holding we will feel more comfortable with. I look forward to using some of the kits from these other vendors in the future.
I've been reading the rocketry bible and my son is reading Modern High Power Rocketry 2. We'll switch when we're done. I have the Mike Westerfield book on order.
Oh, and watching the 4 Apogee Zephyr build videos. Very well done Tim Van Milligaan.
Once I get going, I'll start a build thread. I'll have nothing to show off really. I'm just hoping that those that have already been generous with their advice will follow it and chime in.
Please detail....Or use my U-Loop Method...
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