Jump to content


cplmac

Member Since 18 Sep 2006
Offline Last Active Jan 05 2009 12:03 AM
-----

Posts I've Made

In Topic: 12" shell header on 3" ID whistle rocket

23 October 2008 - 05:56 PM

At first I was surprised that you hadn't tested the motor first to be sure. But I suppose at that size, there's cost and time/labor to be considered.


I did test it first with a 21 pound dummy header back in February.

Test rocket with dummy header

In Topic: 12" shell header on 3" ID whistle rocket

23 October 2008 - 12:03 PM

There is no nozzle on this rocket, it's a whistle rocket.

In Topic: 12" shell header on 3" ID whistle rocket

22 October 2008 - 11:20 PM

Are people still having trouble downloading it or just playing it? It's up on my youtube channel but like all things youtube the resolution is garbage and you can't really make out the TT comets. I short fused this in case there was an errant trajectory, I won't be bulkhead fusing because I use a wood plug at the top for a bulkhead, it's the only way to keep the fuel from blowing through the top of the motor. I can dial in the timing better now that I know the motor can push it properly.

In Topic: 12" shell header on 3" ID whistle rocket

22 October 2008 - 03:22 PM

On the video problem, you might need an HD codec for wmp, the video is 1440x1080 after being renderred from a Sony FX-1. It would be 1920 but Sony uses rectangular pixel sensors in that camera so it comes to 1440. Like Tony said, I'm not makinig the core any shorter because that rocket is heavy. I have no idea what the thrust is on that motor but it pushed a 36 pound rocket pretty easily, if I had to guess I'd say the thrust was at least 100 pounds. Loading pressure on the fuel was about 3500 psi.

In Topic: Post Your Videos

22 September 2008 - 08:21 PM

It's a pretty long show, about 40 minutes if I remember right. It opens with a consumer display a friend of ours does for us every year then we get down to business. The show proper is about 30-35 minutes long. I think you need a divx codec installed to watch it in wmp. A fellow pyro was good enough to rip it for me and compress it to a usable size.