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Post by stoffe64 on Jul 31, 2018 3:06:41 GMT -5
I must share my latest Discovery, that is the fact that the c20b ignitor Cable fits on a Bosch sparkplug wc7a?....coolt! Cheers Stephan Well i found out that theese sparkplugs are of the resistor type, afraid that theese would destroy the igniter box...they sparked intermitently while the original plug sparks continuously...any thoughts on that?
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Post by stoffe64 on Aug 2, 2018 4:34:02 GMT -5
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Post by stoffe64 on Sept 22, 2018 8:11:54 GMT -5
Fiddling With the compressor outlet and piping into outer combustor casing Cheers /stephan Would it work to have that 4" combustor inlet/compressor outlet pipe bend to be over that 3,5" compressor outlet....what happen with expansion when hot?,It Will be connected with 4" Silicon tubing to compressor outlet. Cheers/Stephan
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Sept 22, 2018 9:02:36 GMT -5
What you have in the picture looks pretty good. With a 76mm inducer, a 3.5" diameter bend should be fully adequate. The dynamic pressure will be about ~0.3 psi in a 3.5" tube.
You could use 4" but it wont gain much.
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Post by stoffe64 on Sept 25, 2018 10:08:53 GMT -5
The idea is to slow down the velocity of the compressor air ...thats why the 4" pipe bend.
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Sept 26, 2018 9:17:12 GMT -5
Hi Stephan,
The idea is certainly correct, however there is a point of diminishing returns. Your setup is already well into the point of diminishing returns, so it's good.
If we assume the compressor with a 76mm inducer flows approximately 1.4 lbs/sec @ 47 PSIA through a 3.5" diameter tube, the dynamic pressure will be about 0.3 psi. Which is a very low and good number to have.
Increasing the diameter to 4" will lower the dynamic pressure to ~0.175 psi. Assuming efficient diffusion, the net effect of increasing diffusion to 4" would be to conserve ~0.125 psi. Which isn't much.
If the chamber inlet is currently cut to 3.5" you dont have to bother with the added effort of changing it to 4". If your combustor inlet is already cut to 4" then by all means go with it.
From a performance point of view, either one will perform very well.
Tony
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Post by stoffe64 on Sept 26, 2018 10:23:06 GMT -5
Hello Tony! It is already cut to fit that partiklar pipe bend...I hope that the compressor outlet dont expand too much so it get stucked or buckles the pipe bend....It Will be connected with silicone coupler. /Stephan
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Post by stoffe64 on Sept 26, 2018 10:37:38 GMT -5
In this photo you can see the compressor outlet...can that piece be inside of the 4" combustor casing inlet bend?....that pipe in the Photo is 3,5" Cheers/Stephan
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BFTO
Veteran Member
Joined: February 2016
Posts: 128
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Post by BFTO on Sept 26, 2018 10:57:06 GMT -5
Why make alot of bends when you could have only one 90deg? if you want to decrease the air speed you can have your 90deg bend and then a diffusor.
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Post by stoffe64 on Sept 26, 2018 11:16:07 GMT -5
Nono i Will not use all that bend....in the Photo you can are the compressor outlet which is tigvelded....I Will use that 4" bend. Cheers Stephan
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Sept 26, 2018 19:53:27 GMT -5
In this photo you can see the compressor outlet...can that piece be inside of the 4" combustor casing inlet bend?....that pipe in the Photo is 3,5" Cheers/Stephan Possibly, but it would take a stack of measurements and numbers to give an accurate answer. Have you measured the necessary dimensions or just tried fitting what you are proposing? It looks like you have it ready in this picture. A little more welding, then a couple of silicone couplers and that connection is good to go. Tony
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Post by stoffe64 on Sept 26, 2018 22:03:05 GMT -5
It is a test of what was possible....that 4"pipe bend looked ok to me and that is what i Will try to continue with...thanks för your help Tony.
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Post by stoffe64 on Sept 28, 2018 1:38:34 GMT -5
Hello Tony This is what i work with....4" 90 degree tight radius pipe bend....sitting over that 3,5" compressor outlet....Will be connected with 4" straight silicone coupler...me thinks! Cheers/Stephan
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Post by stoffe64 on Sept 28, 2018 1:44:40 GMT -5
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Post by stoffe64 on Oct 1, 2018 5:38:56 GMT -5
Any of my british friends(or anyone) who know how to connect this thing?....what type of electrical connection?...Cannon?...amphenol?? This is a NOS piece sangamo Weston (pressure transducer) Cheers/Stephan
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