2nd SCCA Mini-Meet--a Success!!

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hinote
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2nd SCCA Mini-Meet--a Success!!

Post by hinote » Sun Feb 26, 2006 9:25 pm

This is a brief report on our little PJ mini-meet, held yesterday at Mike E.'s shop in Goleta, CA. In attendance were Hagen Tannberg, Mike E. and myself.

We burned copious amounts of propane, made copious amounts of noise, and consumed copious amounts of beer. Hagen brought a bottle of his excellent homemade wine for us to try--very good stuff!

A number of pulsejets were successfully operated. I had a truly great time.

Thanks, Mike--for your hospitality and gracious hosting; it just wouldn't have been the same without you!

I'll let the others fill-in some of the gruesome details; hopefully, Hagen will have some stills and/or vids to post here.
Bill H.
Acoustic Propulsion Concepts

".......some day soon we'll be flying airplanes powered by pulsejets."

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re: 2nd SCCA Mini-Meet--a Success!!

Post by Bruno Ogorelec » Mon Feb 27, 2006 12:57 am

I get nostalgic and gooey-eyed when I think of that shop in Goleta. I even remember my burning shoes and socks with a modicum of joy. It was a funny experience, after all, if a bit painful. I wish I could have been with you.

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re: 2nd SCCA Mini-Meet--a Success!!

Post by Mike Everman » Mon Feb 27, 2006 3:51 am

Oh man, what fun. 12 hours of pure pulsejet fun. I was so busy playing, I didn't take a vid or pic, except with Hagen's camera, so I hope he gets some of it up!
My only motor, the twin intake Chinese was finicky as hell. I tried injectors of many types and locations. I did get it to sustain, but nowhere near happy. I made a mistake in geometry that I found shortly after the build, but hoped it would be close enough. In my haste to build for the mini-meet, I also messed with two other variables... I know, I know...

But I had great fun making augmentors for Bill's motors.

I had a fun happenstance. I had harvested a section of 1.5" tail for my chinese from the straight piper I made at Burning Grape. Remember that one, Ben, Bruno and Rossco? Well, I fired it up on sat, and it had 50% more thrust! ha ha I think my "simple rules" just changed!
Mike
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re: 2nd SCCA Mini-Meet--a Success!!

Post by Mike Everman » Mon Feb 27, 2006 3:53 am

Oh yeah, I burned off all the hair on my hands, and dwelled in a fireball again. My nostrils are a bit chapped after that one. I always wear glasses, hat and long sleeves these days.
Mike
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re: 2nd SCCA Mini-Meet--a Success!!

Post by Eric » Mon Feb 27, 2006 4:57 am

Mike sounds like we have had a similar experience. When starting up the 250 lb engine in valveless mode the ignition wire came off of the startup bracket and the fuel stopped burning, only to get re lit somewhere hot and I lost all my facial hair, 1.5 eyebrows, and even though I was wearing pretty tight goggles my eyelashes got it too. My lashes had the ends curled like little hooks kind of like velcro, which made them stick fast together whenever I closed my eyes. Thank god I was wearing a heavy and tight fitting knit cap otherwise I probably would have had to shave my head to get the burnt hair smell out.

Luckily it happend so fast that it only had time to burn the hair and not skin. Though it didnt help that a freak gust of wind blew right at the moment forcing all the gas that was in the 7' long tailpipe back out the front before it ignited.

Anyone know how long it takes for eyebrows to grow back?


Thats too bad that you didnt get the new chinese going as good as you want. I bet if those intakes were tilted just a little bit you would of had something really good.

Eric
Image

Talking like a pirate does not qualify as experience, this should be common sense, as pirates have little real life experience in anything other than smelling bad, and contracting venereal diseases

hinote
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Re: re: 2nd SCCA Mini-Meet--a Success!!

Post by hinote » Mon Feb 27, 2006 4:57 am

Mike Everman wrote: I think my "simple rules" just changed!
Actually, we decided "the only rule about pulsejets is, there aren't any rules!".

The others can probably help out here--but we stuck various lengths and diameters of tubing onto several well-running engines, and the result was--no change!! What the heck is THAT all about? We even put a 5-foot (?) long section of SS tubing onto the end of an operating pulsejet of maybe 3 feet in length--NO change in frequency!

All the hype about affecting the frequency and other operating character with add-ons was put into question this weekend. It must have been the beer.
Bill H.
Acoustic Propulsion Concepts

".......some day soon we'll be flying airplanes powered by pulsejets."

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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 6:32 am

Ok Guys and Gals,

I finally found some time to upload this cool stuff.

The first is Bill's anular Chineese. I think this was the first PJ to run yesterday. It was quite loud and put out something like 5 lbs of thrust.
Attachments
AC-Bill 01.mov
Nice Red Hot CC
(1.64 MiB) Downloaded 245 times
Anular Chineese.MOV
I told Bill "This an't no Chineese!"
(1.15 MiB) Downloaded 230 times
Hagen Tannberg

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Re: re: 2nd SCCA Mini-Meet--a Success!!

Post by Mike Everman » Mon Feb 27, 2006 6:41 am

Eric wrote: I bet if those intakes were tilted just a little bit you would of had something really good.

Eric
yes, it truly sucked to have them blowing across at each other. Double air start injectors worked fairly well.
Mike
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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 6:41 am

Bill's Anular want to be Chineese.

Showing a little less than 5 lbs of thrust on the gage.

I have to say that Bill's trailer really ROCKS !!


So bill what are you going to do when you make a 100 lber ?

Your gage don't go that high!
Attachments
AC-Bill 02.mov
Anular Chineese with thrust gauge
(713.9 KiB) Downloaded 193 times
Hagen Tannberg

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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 6:46 am

Yes it was hard to keep the camera from shaking due to the "wind"

Was trying to dodge the flying bits of red hot metal.

Although it was not nearly as bad as when Bill fired up his "Big" one.
Attachments
AC-Bill 03.MOV
Double cherry view
(829.05 KiB) Downloaded 227 times
Hagen Tannberg

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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 6:52 am

Ok it's Mike's turn now.

Mike whipped out his fancy trident of the sea looking pulse jet. Nice and shinny stainless steel too.

He was having oh so much fun starting it the first time.

Reminds me of my first date :)

At least I didn't burn the hair off my ... hands.
Attachments
C-Mike 01.mov
Trouble with Trident
(1.85 MiB) Downloaded 197 times
Hagen Tannberg

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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 6:57 am

Hey Mike I think some one's knocking on the door!
Attachments
C-Mike 02.mov
knock knock. Who's there? MC MC who? Mike's Chineese!
(968.35 KiB) Downloaded 167 times
Hagen Tannberg

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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 7:01 am

I'm not sure if the growling is the PJ or if it's just Mike's fustration coming out.
Attachments
C-Mike 03.MOV
Bad dog bad dog
(1.04 MiB) Downloaded 179 times
Hagen Tannberg

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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 7:11 am

Ok back to Bill.

Bill is starting his smaller of the two PJ's Sorry I can't remember the number you gave it.

These things are really loud!

Also it's amazing how much thrust the intake is putting out.

It's quite sharp in it's pulses compared to the nice smooth exhaust flow.
Attachments
Bill 01.MOV
Nice managable pulse jet!
(841.18 KiB) Downloaded 169 times
Bill 02.MOV
Almost warmed up.
(1.49 MiB) Downloaded 194 times
Bill 03.MOV
And it's running!
(1.89 MiB) Downloaded 179 times
Hagen Tannberg

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re: 2nd SCCA Mini-Meet--a Success!!

Post by hagent » Mon Feb 27, 2006 7:16 am

Very nice color Bill!

Yes it was very hard to keep the camera from blowing away.

My hat flew of my head at this point!



More to come tomorrow!
Attachments
Bill 05.MOV
The heart of a PJ
(839.52 KiB) Downloaded 186 times
Bill 04.MOV
Nice even color
(850.74 KiB) Downloaded 139 times
Bill 06.MOV
It's just purring... That's why I'm so close!
(1.18 MiB) Downloaded 162 times
Hagen Tannberg

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