first start of my newly built lockwood-hiller pulsejet

Moderator: Mike Everman

Post Reply
keith mcconnell
Posts: 50
Joined: Sun Aug 23, 2009 9:22 pm
Antipspambot question: 125
Location: chattanooga, Tennessee USA

first start of my newly built lockwood-hiller pulsejet

Post by keith mcconnell » Thu Jul 01, 2010 12:49 am

Finally got my engine put together today. working on the test stand but come not wait to try to started it. I have not put in a spark plug yet but used a piece of rag and put in the intake turned on the propane and with just a little bit of air from a leaf blower it started right up! When I get the test stand built I'll get some video and post it. This design is supposed to produce 55 lbs of thrust. If it works I'm going to try to scale it up. Is it possible to just times all the dimension by 1.5 to scale it up? I would like to build an engine that will produce around 100 lbs of thrust.

Thanks,

Keith McConnell

metiz
Posts: 1522
Joined: Fri Apr 21, 2006 6:34 pm
Antipspambot question: 125
Location: Netherlands

Re: first start of my newly built lockwood-hiller pulsejet

Post by metiz » Thu Jul 01, 2010 9:08 am

no you can't just scale up a pj by increasing all the dims x1.5. Acoustics don't work like that, unfortunately
Quantify the world.

Bruce Simpson
Posts: 39
Joined: Tue Mar 09, 2010 9:04 pm
Antipspambot question: 125

Re: first start of my newly built lockwood-hiller pulsejet

Post by Bruce Simpson » Thu Jul 01, 2010 11:07 pm

metiz wrote:no you can't just scale up a pj by increasing all the dims x1.5. Acoustics don't work like that, unfortunately
It will run, but it won't be optimal.

keith mcconnell
Posts: 50
Joined: Sun Aug 23, 2009 9:22 pm
Antipspambot question: 125
Location: chattanooga, Tennessee USA

Re: first start of my newly built lockwood-hiller pulsejet

Post by keith mcconnell » Fri Jul 02, 2010 1:13 am

Is there a Lockwood style engine out there that will produce 100 lbs of thrust? Is there a way to figure out what size combustion chamber I will need and then use the ratios to build the engine?

Thanks for your time,

Keith McConnell

Bruce Simpson
Posts: 39
Joined: Tue Mar 09, 2010 9:04 pm
Antipspambot question: 125

Re: first start of my newly built lockwood-hiller pulsejet

Post by Bruce Simpson » Sat Jul 03, 2010 8:55 am

keith mcconnell wrote:Is there a Lockwood style engine out there that will produce 100 lbs of thrust? Is there a way to figure out what size combustion chamber I will need and then use the ratios to build the engine?

Thanks for your time,

Keith McConnell
The lockwoods I used on my twin-pulsejet dragster produced 160lbs of thrust each. There's video on YouTube.

keith mcconnell
Posts: 50
Joined: Sun Aug 23, 2009 9:22 pm
Antipspambot question: 125
Location: chattanooga, Tennessee USA

Re: first start of my newly built lockwood-hiller pulsejet

Post by keith mcconnell » Thu Jul 08, 2010 1:55 am

Just got the video put on on youtube. At the end of the video the exhaust tube implodes. I guess next time I'll make it out of stainless instead of mild steel.


[url]http://www.youtube.com/watch?v=eJy7kV6XKDw/url]

http://www.youtube.com/watch?v=eJy7kV6XKDw

Keith McConnell

Bruce Simpson
Posts: 39
Joined: Tue Mar 09, 2010 9:04 pm
Antipspambot question: 125

Re: first start of my newly built lockwood-hiller pulsejet

Post by Bruce Simpson » Thu Jul 08, 2010 4:01 am

Ah, Mr Bernoulli, he's killed a lot of valveless pulsejet engines in his day and I've got plenty of flat tailpipes of my own.

Post Reply