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Post by turbochris on Oct 3, 2013 10:10:14 GMT -5
heh, does ernie have solenoids? What? I've seen them. Bigger orifices than Madonna in some of them.
some pull huge amps
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Post by Johansson on Oct 3, 2013 15:50:15 GMT -5
What orifice area do you need and what pressure range? Orifice size perhaps 3-4mm, I´ll look into that closer in a day or two. Pressure range as high as possible. I have a military surplus rocket engine regulator that can be set from way down low to 170 bar or so, but if the solenoid can handle unregulated 200bar from the scuba bottle it would be perfect. I haven´t got a clue whether there exist such an solenoid or not, and the cost would probably be astronomical...
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Oct 3, 2013 18:35:12 GMT -5
What orifice area do you need and what pressure range? Orifice size perhaps 3-4mm, I´ll look into that closer in a day or two. Pressure range as high as possible. I have a military surplus rocket engine regulator that can be set from way down low to 170 bar or so, but if the solenoid can handle unregulated 200bar from the scuba bottle it would be perfect. I haven´t got a clue whether there exist such an solenoid or not, and the cost would probably be astronomical... Look here: www.solenoidvalvesuk.com/NEW150500Bar_solenoidvalves_2232.asp 1/8-1/2 bsp 200 bar........ 160 gb pounds maybe scour ebay for one of these....
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Oct 3, 2013 18:35:44 GMT -5
.
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Post by ernie wrenn on Oct 4, 2013 9:06:46 GMT -5
Getting a solenoid valve in those area's is very expensive. A manual 1/4 turn stainless ball valve will handle the start air.
Problem with a solenoid is the weight, control system, orifice area, pressure differental. I do have several 1/4 valves you can use.
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Post by Johansson on Oct 4, 2013 9:57:08 GMT -5
Perhaps it is easiest/cheapest to build a servo controlled 1/4" ball valve instead?
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Post by turbochris on Oct 6, 2013 9:43:18 GMT -5
if it will start on say 50 bar one of ernies N2O noids would work. I mix ernies bases with different coils. The N2O coils have low ohms and pull a lot of current. pick a base with the orifice size you want, then try a fuel solenoid coil if it don't open then go up to an N2O coil.
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Post by ernie wrenn on Oct 7, 2013 11:44:38 GMT -5
The fuel solenoids operate at a low Delta Pressure.. Differential between line pressure and 0 psig. The orifice area is .375..
The max pressure for a nitrous solenoid is 1250 psi. Amp draw at that point is 20 amps @ 12 vdc. Increasing the voltage will raise the operating pressure but lowers the Duty Time.
A requirement of 50/100 bars will require a High Pressure Cyro solenoid with high voltage.
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Post by Johansson on Oct 14, 2013 15:47:49 GMT -5
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Post by stoffe64 on Oct 14, 2013 16:30:12 GMT -5
It looks so simple when you do that anders.....
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Post by racket on Oct 14, 2013 18:34:01 GMT -5
Hi Anders
Mass production .....nice :-)
Cheers John
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Post by Johansson on Oct 19, 2013 15:16:04 GMT -5
Yeah, making two is almost as easy as making one. Just takes a bit more time. Olov and I had a laugh today about it saying that we will soon be part of the exclusive club for those who have heard a gas turbine failure in stereo... *LOL* Here are some pics from today, I was welding the combustors and Olov made the rear axle in the lathe. The "legs" of the kick will be made out of two motocross fork legs so the entire engine package will be dampened to soften the impact from the bumpy ice track. Inspecting the work. =) Aligning the flame tube on the flange in the lathe. One down, one to go! The axle for the fork legs. In place. Sorry about the rough pictures, we only had a mobile phone with us.
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Post by racket on Oct 19, 2013 16:41:57 GMT -5
Hi Anders
No turbine failures this time , you've both had your fair share of those , time for success :-)
"The more engines you make the easier it gets" , heh heh , thats what suppose to happen , I think they just get more refined , not easier , we start to realise all the potential problems that can eventuate and have to try and prevent them by doing the job a bit better than previously............progressive development .
Cheers John
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Post by turbochris on Oct 21, 2013 8:53:58 GMT -5
After this year add another turbine, and add one each year! clusterfuck!
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metiz
Senior Member
Joined: April 2011
Posts: 297
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Post by metiz on Oct 21, 2013 9:52:26 GMT -5
Anders, in the 2nd picture, you're holding the flametube. It looks like the top has been cut and re-welded. Is this so you can get the round-to-square shape or is there something else welded inside (can't quite see) If there isn't, you can make a flat pattern layout that will allow you to roll those cones without cutting it open
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