It´s all about weight. It´s now about 5,6 kg (without fuel). After further weight reduction I hope to reach a total of 6 but not more than 6,3 kg. The engine provides 14,4kg of thrust at approx. 130.000rpm but is loosing about 45% of it passing the tubes.

Views: 565

Comment by Crasher on January 25, 2013 at 4:19am

Oh my god! This is pure epicness!

If you're ever in london, I will buy you all the beer you can drink.....

Comment by OlivierD. on January 25, 2013 at 4:35am

Are you going to call it Prometheus? Great job, can`t wait to see your test flights. Keep us posted!

Comment by Julius Donocik on January 25, 2013 at 4:37am

You´re a lucky guy this time! I do not drink really much! 

Comment by Julius Donocik on January 25, 2013 at 4:39am

I guess I will call it "Binford 6100"because what I need a lot of is MORE POWER!

Comment by Julius Donocik on January 25, 2013 at 4:46am

Even the power/weight relation always could be better I know it works. I made few small jumps long time ago as the engine was fresh and reached the max rpm. At this time I had around 1kg more weight and a misbalanced unit. A lot of people seems exactly to know it could not work from the paper. I say, f..k the paper - give me power!

Comment by Julius Donocik on January 25, 2013 at 5:07am

Yes! you´re right but this will come once I have the pressure/temperature ration established without blowing it all. That´s also why I need to have an automatization. I need to source out the temp control to the APM and regulate the engine accordingly. If you put bellmouthed nozzles directly it will give too much resistance which the engine must force. This would let increase the gas temperature. I allow the gas to expand and then go to the fine-adjustement. There will be also fresh-air inlets where the gas enter the gas divider at the engine. Let´s see what it will bring;) You´ll never get anything for free...

Comment by Gary McCray on January 26, 2013 at 12:10pm

Beautiful clean design and excellent fabrication.

A design and engineering masterpiece, so blasted German.

In 1974 Garrett made the STAMP for the US Marine Corps ->

Given the technology of the time it is amazing that it actually worked at all let alone didn't kill anybody.

Yours look much better.

As seen in the STAMP it seems that expansion chambers might be useful to turn high velocity thrust and huge excess heat into cooler stronger static thrust.

I know that in real rocket motor design they often use very light weight "interesting" reinforced composites for the expansion bell with the proper design resulting in the hottest gasses pretty much staying away from the walls. (Of course they do have limited life spans.)

Absolute best of luck to you can't wait to see a picture of it in the air, (Video Everything)!

Comment by Emery c. Chandler on January 26, 2013 at 12:17pm

AHAHA so freaking cool! video plz!

Comment by Julius Donocik on January 26, 2013 at 12:30pm

As nobody accepts to assist my previous starts (don´t ask me why) I was too busy to avoid the rig from blowing so unfortunately no usable video clips available. it´s now a question of weeks to provide one!

Comment by Gary McCray on January 26, 2013 at 12:48pm

I'm sure if you get them a full fire suit and hand them a fire extinguisher they will be much more comfortable with filming for you.

Speaking of Binford, episode of Tool Time with jet auxillary power unit powered lawn tractor comes to mind.


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