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  #11  
Old 01-30-2020, 02:51 PM
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Quote:
Originally Posted by burkefj
a "little weight" is an understement. In a tail mounted model like this for example, if you were to do two G-12's

Two G-12's would get you 186 Ns total impulse, putting it into HPR rules anyway, if that's an issue at your field.

I understand what you're saying. I was thinking about smaller motors, which still would add weight over the single larger motor, but I haven't actually looked at the potential motor selection before now. You don't have anything that, flown in pairs would come close to meeting similar weight and thrust profile as a single G-12.

Apogee/Aerotech has a couple motors that are long burn, but their casings are similar in size to the G12 (the F13 uses the same casing) and would be about as heavy as a pair G-12's. To make it feasible they'd have to be nearly half the weight, and as a pair provide a good enough thrust profile to work with.
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  #12  
Old 02-04-2020, 12:49 AM
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Yup, if Aerotech can get the G-12 single use 29 to meet temp or change the temp rules, that would give a 140 or more ns G motor with a 12 second burn, I've flown two and they were great in a model this size for only 1 ounce more tail weight.

Quote:
Originally Posted by tbzep
Two G-12's would get you 186 Ns total impulse, putting it into HPR rules anyway, if that's an issue at your field.

I understand what you're saying. I was thinking about smaller motors, which still would add weight over the single larger motor, but I haven't actually looked at the potential motor selection before now. You don't have anything that, flown in pairs would come close to meeting similar weight and thrust profile as a single G-12.

Apogee/Aerotech has a couple motors that are long burn, but their casings are similar in size to the G12 (the F13 uses the same casing) and would be about as heavy as a pair G-12's. To make it feasible they'd have to be nearly half the weight, and as a pair provide a good enough thrust profile to work with.
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  #13  
Old 02-04-2020, 01:19 AM
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Quote:
Originally Posted by burkefj
Clearly you don't understand the concept of "the speed of foam"


Funny!

When I was about 13, I put a B14 in a Flying Jenny, a biplane boost glider free plan from Estes. As an adult I described that short flight as “exceeding the speed of balsa”.

I obviously did not understand thrust curves, or motor designation meanings.
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  #14  
Old 02-04-2020, 08:28 AM
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Quote:
Originally Posted by ghrocketman
Gotta have a second seat for the passenger. The ejection seats and ABs would remain FULLY FUNCTIONAL too.

Heck yeah. Passenger blabbing too much? No problem. Eject eject eject!
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  #15  
Old 02-16-2020, 01:29 PM
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Here's the fight video from Friday the maiden flight and second flight

https://youtu.be/tv4pCCWAyYo
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