novahobbies
Well-Known Member
Gonna see if I can!Bummer, no class 1 flights then. If you can trim 30 grams you'd be good to go on the G74!
Gonna see if I can!Bummer, no class 1 flights then. If you can trim 30 grams you'd be good to go on the G74!
Well, whoops! Lucky me.....I thought that felt a little butt-heavy, so I double checked.Bummer, no class 1 flights then. If you can trim 30 grams you'd be good to go on the G74!
you'll need a AT-universal drilling tool for that AT H100 delay which is adjustable. i set mine to 8 seconds for my Zephyr L1 cert.That makes sense, and it's good to know, thanks. I'm diving into learning about high power motors this week. Want to make sure the H100 will work, but that 14 second delay is WAAAY too long. I'm letting TVM show me the ropes on the Apogee construction vids. ;-)
i've got a zephyr.. mine w/o motor is 975g (your's is 457g heavier (1.121lbs)). saying this.. when i flew mine for my L1 (i used an H100), one of the guys here in Dalzell did launch his zephyr on a G80... it didn't look stable at all..! Even the RSO mentioned that 'it might be' stated that you can fly with a 'G'... but you probably shouldn't..Bummer, no class 1 flights then. If you can trim 30 grams you'd be good to go on the G74!
I don't think I'm doing ANYTHING with this until I try for the L1 first. The rocket simmed successfully on the G, but there's a bug difference between the Sim and real world. I don't want to bust her up before her time!i've got a zephyr.. mine w/o motor is 975g (your's is 457g heavier (1.121lbs)). saying this.. when i flew mine for my L1 (i used an H100), one of the guys here in Dalzell did launch his zephyr on a G80... it didn't look stable at all..! Even the RSO mentioned that 'it might be' stated that you can fly with a 'G'... but you probably shouldn't..
i have 2 G80's that i won't fly in my 'Z' now due to the performance characteristics' of these low power motors for the heavy 'Z'.
Good Luck,
r-
I don't want to hijack this thread but my plan for my Zephyr when I get it built is to fly it on some G's before going for my L1. The Apogee website lists several G's as recommended motors, G80 as well as G77, G78, G79 etc. Now I am wondering if other people have flown their Zephyr on G's with success (or not)?one of the guys here in Dalzell did launch his zephyr on a G80... it didn't look stable at all..! Even the RSO mentioned that 'it might be' stated that you can fly with a 'G'... but you probably shouldn't..
You can find a fair few YouTube vids of Zephyrs on G motors, and it DOES Sim well with the G. But let's be fair. It's a HP rocket with the weight to match. I'm sure I'll still toss a G into it at some point, but since I want to get the L1 with it, I decided for my own model that I'd rather let the maiden flight be on a proper HP motor first. If we're gonna fail, let's fail big!I don't want to hijack this thread but my plan for my Zephyr when I get it built is to fly it on some G's before going for my L1. The Apogee website lists several G's as recommended motors, G80 as well as G77, G78, G79 etc. Now I am wondering if other people have flown their Zephyr on G's with success (or not)?
on my zephyrs' maiden flight with an H100 got about 2000', on the second flight with an I204 we got 2317'. as you state it 'is' a 4" HPR and at 975g w/o motor it's heavy.You can find a fair few YouTube vids of Zephyrs on G motors, and it DOES Sim well with the G. But let's be fair. It's a HP rocket with the weight to match. I'm sure I'll still toss a G into it at some point, but since I want to get the L1 with it, I decided for my own model that I'd rather let the maiden flight be on a proper HP motor first. If we're gonna fail, let's fail big!
Good decision. I see too many folks (Especially college students) that just shove the motor in there while paying no attention to the delay and then wonder why they fail as the shock cord slices through the body tube like a hot knife through butter as the rocket falls like a home-sick-brick and the laundry comes out at terminal velocity....I ordered my universal delay drilling tool for DMS motors last week. Ought to be here tomorrow or Wednesday....so that's more thing off the list!! Getting mighty close to the "time to buy an H" stage.
I was generous on the epoxy when I built mine to ensure it was strong and still test flew mine on a couple Gs back in the day. G79 (LMS) and a G76G (RMS) if I remember correctly. It came off my 8' rail no problem and was a nice low flight for a test dumping the chute at apogee.You can find a fair few YouTube vids of Zephyrs on G motors, and it DOES Sim well with the G. But let's be fair. It's a HP rocket with the weight to match. I'm sure I'll still toss a G into it at some point, but since I want to get the L1 with it, I decided for my own model that I'd rather let the maiden flight be on a proper HP motor first. If we're gonna fail, let's fail big!
AT H128W and H180W both fit under the Class 1 limits for propellant weight. I'm sure there are many more, but I pretty much only fly the White Lightening.I believe there are a couple of H motors that can be flown under FAR 101 regulations if the total weight is met. Can't find it now since I misplaced the notebook of rocket info in a move.
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