…then the earth-shattering Ka-boom!
A home-brew pirate cannon sends a flaming bowling ball straight up.
They make the strangest undulating doppler whine on reentry, I’m guessing from the three finger holes spinning madly around.
"They make the strangest undulating doppler whine on reentry, I’m guessing from the three finger holes spinning madly around. "
As far as I understand (my bro is gunshot instructor) this effect happens because of the projectile itself (cannonball/bowlingball = round nosed)? and secondly for the lack of bullet-case + the caliber of the firearm/cannon…
"In general, a pointed bullet will have a better ballistic coefficient (BC) than a round nosed bullet, and a round nosed bullet will have a better BC than a flat point bullet."
en.wikipedia.org/wiki/Bullet
en.wikipedia.org/wiki/Ballistic_coefficient
Anyway, it’s a fantastic shot, that;s the most interesting of all!!! 😀
Jef: Anvils? Only if we see a wily coyote. Team Numb did comfortably launch a fat rocket on a P7000 motor to loft a full beer keg from Oregon. 175 lbs of beer. They tapped it at the landing site (it was a perfect flight). And the beer was yummy. (Not to be outdone, I improvised on the spot and sent my son’s milk bottle up in a Nike Smoke, and got it 100 ft. higher. I shared with Team Numb as they were having cookies on Sunday. The motor warmed the milk… just like mama used to make…)
saicode: Since we were launching rockets all weekend, we had a prior waiver from the FAA to keep the airspace free (up through 100K ft. altitudes during the day).
Hi, I’m an admin for a group called Pyromaniacs, and we’d love to have this added to the group!
I have one of the bowling balls we found late Sunday while looking for the QPDoll. Its a desk paper weight now. Very cool!
Pyromaniacs?
That sounds dangerous! We draw the line with high explosives, rocket propellant, and hypersonic kinetic earth penetrators. We’ll have to work our nerve up before we play with fire. 😉
Seriously, though, we don’t get the airspace cleared by FAA. Commercial traffic is vectored under ATC advisement. Under FAR 101 regulations we are required to yield to aircraft. We do post a nice warning to the aviation community in terms of a NOTAM (Notice To Airmen) advising them of our activities, and they tend to avoid us. I suspect it keeps their laundry bill down that way, and they don;t have to pack so many extra pair of shorts, in case they need an emergency change. Only guys who seem to push the envelope are the military jocks who don’t feel a need to take a bunch of civilians playing with toy rockets too seriously. They learn quick enough if they fly around us, and gain some respect FAST.
Victor just posted a short video of one of these flaming bowling ball launches… Great audio track!
So awesome, fully glad there are people like you guys out there!!!
em>(ACTION NOW)
Royal Garrison Artillery stationed outside Lille – 1918
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