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Post by Johansson on Nov 26, 2012 4:14:37 GMT -5
Hi Stoffe and John,
Some of the smoke came from the vent from an over filled oil tank and some from the 4-stroke oil pump engine exhaust.
The gas turbine did have some idling problems that might be caused by a new propane preheating tube that Olov fitted just before the test, there is a 1mm clearance between the tube and the hole that sits just beside the idle spray nozzle so the airflow might upset the primary combustion zone somehow.
As long as we start the engine at a higher throttle setting so it revs up to 0.8bar P2 directly it runs just fine so I think we´ll leave it as it is for now. Olov has some work to do with the Arduino programming because the afterburner pump refused to give more than 50% fuel flow, the engine didn´t run nearly as hard as it use to do when the afterburner is fully lit.
Cheers! /Anders
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sven
Veteran Member
Joined: February 2012
Posts: 102
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Post by sven on Nov 26, 2012 11:19:04 GMT -5
Nice Anders, lake got nice thick ice already in Sweden, @ Estonia we still have pluss degrees, At the beginnig of november we had couple of days cold and snow but it melted in few days. Having smooth ice without snow is best you can get, lucky guys Cheers Sven
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Post by racket on Nov 26, 2012 14:58:01 GMT -5
Hi Anders
No great problems in that case :-)
You'll really be flying if you get 100% , all that nice flat ice to play on .
Cheers John
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jdw
Member
Joined: January 2012
Posts: 41
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Post by jdw on Nov 28, 2012 19:23:51 GMT -5
Hi Anders,
Your work amazes me every time I see it. If it's not to much trouble could you post a short video of you turning the free power wheel? ;D I'm sure the sight wold fill my dreams for many months to come ;D
Salute Justin
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Post by Johansson on Nov 29, 2012 0:53:16 GMT -5
Sven & racket: Unfortunately the ice will soon be covered in 20cm snow so we were very lucky to get this opportunity to run without having to spend days to plow a track first. Since we ran 122km/h two years ago with bent runners and only 2.2bar P2 I think Olov should be able to go 140km/h at least if the track is good and the engine is running like it should. Justin: No trouble at all, I´ll get to it tonight. Cheers! /Anders
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Post by turbochris on Nov 29, 2012 9:15:34 GMT -5
that was fucking gloriously insane!
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Post by Johansson on Nov 30, 2012 17:49:25 GMT -5
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Post by racket on Nov 30, 2012 22:21:16 GMT -5
Hi Anders
Sweet :-)
Cheers John
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jdw
Member
Joined: January 2012
Posts: 41
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Post by jdw on Dec 1, 2012 12:22:53 GMT -5
Anders, That's simply amazing thank you Justin
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sven
Veteran Member
Joined: February 2012
Posts: 102
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Post by sven on Dec 2, 2012 6:30:23 GMT -5
very nice indeed
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Post by Johansson on Dec 2, 2012 16:08:53 GMT -5
Thanks guys!
I am milling a pair of gearbox mounts right now and they would almost have been finished by now if I weren´t short of four M12-85mm insex bolts, I´ll get them tomorrow and try to get the mounts finished in a day or two.
Cheers! /Anders
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Post by Johansson on Dec 5, 2012 11:00:45 GMT -5
The last couple of evenings I´ve been busy making the gearbox mounts, tonight I will rest since I only got 4 hours of sleep last night before it was time to go to work... I started by drilling two 12mm holes in all four parts and countersink the holes for M12 insex bolts. This is what I ended up with. Before I could do the next step I had to manifacture a jig that I could fit the pieces to in the mill, I found a decent sized aluminum block that I drilled and tapped for M12 bolts. <a href="http://s231.photobucket.com/albums/ee196/Anders811017/Anders%20projekt I need this jig to arbor the 1" holes that will clamp around the lower frame tubes, just like the front engine mount in case you remember how that was made. First I tested to use a metal hole saw to make the 1" holes but it didn´t turn out very well so I chose to arbor the holes instead. Turned out much better. After that I trued all surfaces... ...and finished off the parts by angling the edges (don´t know what it is called in english) with a 45° mill bit. The finished mounts! The gearbox sits rock solid on the frame tubes, I deliberately made the holes slightly oversized so the frame tubes will fit even after they are painted. Later I can improve the looks a bit by milling off the 90° corner on top of the frame tubes but for now this will do. Mission accomplished! Cheers! /Anders
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sven
Veteran Member
Joined: February 2012
Posts: 102
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Post by sven on Dec 5, 2012 12:13:15 GMT -5
You have truely nice machinging skills, my project looks like pile of crap compaired yours work ;D Keep up good work Anders and get nice 8h sleep this night:)
Sven
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Post by Johansson on Dec 5, 2012 13:51:46 GMT -5
Thanks a lot Sven, thousands of hours in the workshop through the last 10 years sure starts to give decent results. I cannot say that I was less proud of my work 10 years ago though, probably more since I didn´t demand very much from myself back then. Your project looks great by the way!
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wolfdragon
Senior Member
Joined: April 2011
Posts: 287
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Post by wolfdragon on Dec 5, 2012 16:37:45 GMT -5
Milling off the sharp 90 degree corner is called "chamfering"
Nice looking set of mounts there
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