I too write myself notes to not forget things! What special function do you use the fork for?Glueing Fins
I made a plywood fixture to help assure fin alignment and to hold the rocket while gluing fins.
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What special function do you use the fork for?
Edit: I think I know! Popping the rear centering ring out via the fin void?
Well, do you really need to cover it up? I mean, it’s all centered anyway. The front centering ring is there for ejection gasses to do their thing. Would the empty space cause issues?This fin can assembly is hell-for-stout and aesthetically pleasing. I almost hate to install the rear centering ring and cover this all up.
Well, do you really need to cover it up? I mean, it’s all centered anyway. The front centering ring is there for ejection gasses to do their thing. Would the empty space cause issues?
If you don't mind an opinion, that looks like guilding the lilly.I thought about "weaponizing" the rocket.... and adding some 1/4" dowels to fill up the gaps.... I'll mock something up once I get all the cones on. Not sure if it's something I really want to do or not.
pew... pew, pew, pew... pew, pew.
Thanks Joe... I agree. Gilding the Lily – Meaning, Origin and UsageIf you don't mind an opinion, that looks like guilding the lilly.
My temptation would be move them back the extra 1/2 inch (butt the rear end of the current notch with the forward edge of the fin) and cut the extra off the end. Would be different if it was a SCALE model. Then again, I aren’t a real engineer, so i often don’t have a fixed plan to start with.Attaching The Fin Base Cones
These little pieces are giving me fits.
And attaching these to the rocket requires some "unconventional" clamping and gaping methods.
- I mistakenly cut the slots a 1/2" too long... (CWF to the rescue).
- By the time I finished slicing, dicing and beveling them half of them snapped into 2 pieces. That shouldn't be a problem though... (Gorilla Wood Glue to the rescue).
It's a bit tedious but I think they'll look good once they are all in place, the glue fillets are added, and a I spend a couple hundred hours adding CWF - sanding - primering - sanding, etc.. You folks know the drill.
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I thought about "weaponizing" the rocket.... and adding some 1/4" dowels to fill up the gaps.... I'll mock something up once I get all the cones on. Not sure if it's something I really want to do or not.
pew... pew, pew, pew... pew, pew.
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Update: Coming together... needs quite a bit of clamping but everything is aligning pretty well.
My temptation would be move them back the extra 1/2 inch (butt the rear end of the current notch with the forward edge of the fin) and cut the extra off the end. Would be different if it was a SCALE model. Then again, I aren’t a real engineer, so i often don’t have a fixed plan to start with.
thank you!Applied ZAR "Merlot" wood stain to the nose cone.
No, it’s a little more complicated than that. You only need a waiver for >125 g propellant or >1500 g pad mass. There are a few baby H motors less than 125g. Most of the 3 grain CTI 29mm motors are but I don’t know about the AT options.
You've got snow already? Wow. And I just saw some other photos from a fellow in Puerto Rico where he's in shorts and a T-shirt and it's warm and sunny. We are all over the place, us rocket guys.This is the heaviest rocket I have swing tested... looks like ole Level One passed the test.
Depends what you're looking at. The FAA waiver is for 1500g pad weight and 125g of propellant. NAR and TRA high power is the >80N (average, not max), >160Ns, >320 Ns that you mentioned. You can fly high power without an FAA waiver if you can slip under the padand propellant weights.Question: Isn't there also a LP limit of :
The reason I ask is the H128 max. total impulse is 173 N-s, so wouldn't that mean a waiver is required?
- Average Thrust 80N Max,
- 160N-s Total Impulse Max for each motor,
- 320N-s Max for clusters.
Or is the waiver only based on ">125 g propellant or >1500 g pad mass".
Thanks
That's awesome and just the answer I was hoping for. Thanks.Depends what you're looking at. The FAA waiver is for 1500g pad weight and 125g of propellant. NAR and TRA high power is the >80N (average, not max), >160Ns, >320 Ns that you mentioned. You can fly high power without an FAA waiver if you can slip under the pad and propellant weights.
But for a cert flight you do need at least one certified observer to sign the paperwork, which still usually means a club launch, where a waiver would usually be in effect anyway.Depends what you're looking at. The FAA waiver is for 1500g pad weight and 125g of propellant. NAR and TRA high power is the >80N (average, not max), >160Ns, >320 Ns that you mentioned. You can fly high power without an FAA waiver if you can slip under the padand propellant weights.
Definitely true. Once you have the L1 cert, it allows you to fly up into H at your home field with no waiver, presuming it's big enough. Also, you can fly your cert flight at home if you have (1-2) witnesses willing to come by and watch.But for a cert flight you do need at least one certified observer to sign the paperwork, which still usually means a club launch, where a waiver would usually nein effect anyway.
Ima gonna steal that oneThis rocket is in paint jail...
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