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Is this for posting pictures of any machbusters, or for admiring yours?
(It's very nice by the way - you should fly it on an H268R )
OK. Here was my first (verified) supersonic shot: a somewhat modified PML Cirrus Dart on an I600 redline, carrying a prototype Featherweight Parrot onboard. Max speed mach 1.6ish, altitude 11,950 feet:
And the data:
And a Cd curve extracted from the accel data (velocity is in m/s - sorry)
As for yours, why use railbuttons? Are there no towers available?
J510 to I1299? That'd be sick! I've got to build one of those some time.I have two that can possibly go mach if I use the largest motors that will fit.
One is a 2.6" scratch build I call The Sound of Madness. I flew it on a J510 which sims past mach, but I'm still waiting on altimeter data to show that it did.
It got a little beat up when the drouge failed to deploy, so it won't fly again until next year.
The other is a slightly beefed up PML Thunder N Lightning, with Magna-Frame sleeving in the bottom sections of tubes. Once again, it sims past mach. I just need the sustainer to light.
The booster motor burned out at 300 MPH, so there is some potential.
J510 to I1299? That'd be sick! I've got to build one of those some time.
let the case hang out the back a bitI've thought about it, but I think the 1320 case is too long to fit in the booster. A J570 will fit, though.
Edit: I just checked.
The case is about half an inch too long, meaning that I'd have to build a special interstage coupler for it to accept the extra length and the parachute. Maybe I'll get bored someday...
J510 to I1299? That'd be sick! I've got to build one of those some time.
Rocksim?
Here is my machbuster. It is a VB Extreme 54. All three tubes have been fiberglassed. Pseudo slots were cut for fin mounting. Once the fins were cured, they were covered in a tip-to-tip fiberglass to protect them upon landing and hopfully keep them on during flight. It has not flown yet as I am in need of drilled and tapped forward closures. Motor retention is a 54mm Slim Line retainer.
So far, my only mach flight has been my Ultimate Wildman on the N10,000. The 12 foot tall, 58lb rocket went to 11,927ft at Mach 1.38. Not your typical machbuster.
Different routes taken to reach the same destination.That's amazingly close to the flight profile of my Cirrus on an I600.
Looks pretty sick. I need to get David Hassinger on here to post some pictures. He's got his minimum diameter L3 bird called the Red Baron. He's going to put it on a 98mm baby O next year. A green carbon fiber/fiberglass/kevlar bird, 75mm minimum diameter, flown on K-L. "frankenrocket" a 38mm minimum diameter rocket, you guessed it, carbon fiber/kevlar/fiberglass, and a brand new 54mm minimum diameter fiberglass rocket, with tip to tip carbon fiber. That he is going to fly on a research L sometime next year.
-Braden
the Loki case didn't function properly, as to blow out the nozzle or closure before blowing the case apart.
Here is a follow up to the machbusters I was speaking of built by Dave Hassinger somewhere in this thread.
Here is the red baron, on an EX N3200 Swamp Gas/everclear motor, started to wobble, then shredded
[YOUTUBE]GaaMTo4qzHU[/YOUTUBE]
Here is the 3 inch version of the same rocket, flying on an M something or another everlcear EX motor
[YOUTUBE]1ZbLVw7m46s[/YOUTUBE]
the motor over-pressurized, pieces of the case went everywhere, the Loki case didn't function properly, as to blow out the nozzle or closure before blowing the case apart.
He has now built an all aluminum rocket, there is an 8 foot aluminum tube...that's the motor. :surprised: then there is 1 foot of airframe to house the main parachute and shock cord. First flight is on May 20th in brothers oregon on an Orange Sunset O3100.
Braden
Oh, it didn't blow out the side, there was pieces of case EVERYWHERE. took us about an hour to collect as much as we could find.I'm not sure I would call that a malfunction of the casing. It's true that blowing a closure is a common failure mode, but depending on the kind of failure, pretty much any casing can be made to blow out the side as well.
Flying on the frozen steppes looks.....cool.
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