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Post by racket on Feb 25, 2016 21:30:41 GMT -5
A couple pics of the cleaned parts waiting to be assembled   Tomorrow morning I'll start  |
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Post by enginewhisperer on Feb 25, 2016 22:05:02 GMT -5
it certainly looks pretty serious!
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Post by Johansson on Feb 26, 2016 0:19:34 GMT -5
Great looking parts John!
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Post by smithy1 on Feb 28, 2016 16:27:34 GMT -5
Hi Smithy Sure would , but think how 250 SHP would go Cheers John I think with a bit of clever engineering and twin freepower wheels, it may get even more than 250shp John...I believe you're being a bit conservative..!  It would also have a stupid amount of torque.....tyre turning would be nearly instantaneous!!  Great looking parts collection John...I'm a bit envious of that engine....after I did a few mental calcs...I came to the conclusion that it's gunna go like stink..! Cheers, Smithy. |
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Post by racket on Feb 28, 2016 16:37:20 GMT -5
Hi Smithy LOL, you know me , always conservative The trial assembly went well over the weekend until I did an inspection on the shaft tunnel and found some "problems" .............just my crappy unskilled machining , then my attempts to fix the problem only created more problems ...............now I'm in a quagmire , gunna need to do even more work to hopefully salvage an acceptable outcome . Got the exducer shroud/exhaust welded to the Vband flange and some mounting pads for the thermocouples welded in place and the P4t pitot mounted , with it all nicely sprayed with high temp paint , just need to cure it in the oven today . Hopefully the next assembly will be the last one Cheers John |
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Post by smithy1 on Feb 29, 2016 20:17:53 GMT -5
How'd you get on with the shaft tunnel John..?
Smithy.
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Post by racket on Feb 29, 2016 20:24:40 GMT -5
Hi Smithy
LOL..............still looking at the shaft tunnel , I'll wait for a nice cool day before I tackle the job , my heads been "vacant" these hot days .
Spent the morning drilling lockwire holes in 4mm socket headed screws , 10 for the flametube to NGV wall and 6 that hold the air deflector in place , don't want things coming lose and going through the turbine wheel.
Cheers
John
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Post by smithy1 on Feb 29, 2016 21:19:00 GMT -5
I feel your pain LOL..be sure to let us know how you get on with the tunnel.
Good idea to lockwire, and good cheap insurance....I spend half my working life doing bloody lockwire on governors and FCU's etc...I'm pretty much over it now....0.010" & 0.015" lockwire ain't the easiest to work with either..!
Do you have enough wire?? I can send you several kilometers of 0.025" inconel "hot section" wire if you need it..!
Smithy.
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Post by racket on Feb 29, 2016 21:31:09 GMT -5
Hi Smithy
I think I'll need several more lives to get through the roll of lockwire you already gave me , yep , great insurance even when done as rudimentary as mine ends up .
Theres a few awkward position on some of the screws that will test my skills , best thing is I don't have to worry about them once done .
Cheers
John
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Post by smithy1 on Feb 29, 2016 21:42:25 GMT -5
Ah...LOL..I had forgotten I had already given you some...
I think you'll find that if you hold your tongue in the right spot you'll be able to do any lockwire. ...works for me..LOL.
Smithy.
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Post by madpatty on Mar 3, 2016 22:16:36 GMT -5
Hi Racket, What fittings you use for joining the oil pipe from the pump to the engine. Are they the ordinary copper compression fittings like in the image below?  I wanted to know if ordinary compression fittings handle the oil pressure we use? Thanks. |
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Post by racket on Mar 4, 2016 1:58:31 GMT -5
Hi Patty
Yep , normal copper water pipe brass fittings , they can easily cope with our oil pressures .
Though at the engine where I have to allow for disassembly , I use o'rings instead of the brass "olive" , with the nut only gently tightened and the fitting lockwire back to the engine so that it can't blow off .
Cheers
John
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Post by racket on Mar 11, 2016 1:51:29 GMT -5
Hi Guys Assembly is progressing , just need to get the main can silicone O'ring , after finishing machining its groove in the comp front cover I can finalise assembly in a couple of hours then get the engine mounted on the test stand and fire her up after getting the "umbilicals" sorted . The silicone O'ring has been a problem sourcing , a couple of potential suppliers have stuffed me around and wasted more than 2 weeks , theres 2 O'rings "in the post" , and have been for 5 days coming from a 2 hours drive away  .............I'm getting impatient , but the extra waiting time has given me the opportunity to do a better job with some of the things I normally rush .    Cheers John |
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Deleted
Joined: January 1970
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Post by Deleted on Mar 11, 2016 2:06:42 GMT -5
Hi John
Its looking good, real good :-) yep nothing more annoying than some company giving it "yep we can do that", for it to turn into oh leave it with us we are a little busy at the mo, and well we, erm , you see, may be not two weeks later...
All Best
Andy
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Post by Johansson on Mar 11, 2016 14:45:03 GMT -5
Awesome!
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It would also have a stupid amount of torque.....tyre turning would be nearly instantaneous!! 
.............I'm getting impatient , but the extra waiting time has given me the opportunity to do a better job with some of the things I normally rush .