- May 2, 2009
- Reaction score
i reeeeeeeeeeaaaallly want a trio of them, if not more...
They were plauged with CATO's because of the long grain length. BP is very brittle in rocket motor form, if you dropped the motor or mishandled it, there was a pretty good chance of it CATOing due to the grain splitting in two. This would create much more burn area, and thus, overpressurize the casing. Sound like the old Estes E's or the D12's? I believe they had the same type of problem.Originally posted by Blue_Ninja_150
Ohhh yes BP can ignite by friction. I like detonating Black cats with a hammer.
Elapid- A while back Rocketflite made motors called "Silver Streak" that were BP. They had a HUGE trail of BRIGHT sparks (Better than skidmark IMHO) and they were from the F to H range. They probably aren't certed anymore, but Rocketflite is saying they will bring the line back sometime.
Can't do it. I know you have to have L1 to fly over a certain amount of newtons and/or fuel, but that doesn't mean you can get certed using them. I raised a ruckus on r.m.r about this until Ray Dunakin explained the why and wherefore.Originally posted by Elapid
i was toying with the idea of doing an L1 cert on BP motors
I do not think that there is a weight limit of what a non-certified person can fly, just a total impulse limit. Nar says you can cluster motors up to 320 n/s... but a single motor can not be larger then 169 n/s. 320 n/s would be approx 320 grams worth of BP, or 160 grams worth of APCP.so, nobody can legally fly a BP-powered rocket with more than 125g of propellant weight unless they first fly H-powered rockets and get their L1 Cert first.