bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Nov 5, 2017 1:52:35 GMT -5
lol.. You ll definitely get it to run.
Now, what if you were using full compliment ceramic bearings?
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Post by jetjeff on Nov 5, 2017 2:37:19 GMT -5
Hi,
My Kamps build does have GRW angular contact, full compliment ceramic bearings. My Schreckling builds just have caged ball bearings, I didn't feel the lower RPM's for the Schreckling engines warranted GRW bearings. I think Kamps recommended replacing the bearings after 20 hrs of flight time.
Regards
Jeff
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bournaVee
Junior Member
Joined: January 2017
Posts: 66
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Post by bournaVee on Nov 5, 2017 13:32:50 GMT -5
Hi jeff, 20hours seems kinda small. GRW bearings aren't that cheap.
Cheers, BournaVee
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Post by jetjeff on Nov 23, 2017 1:49:12 GMT -5
Hi Guys, I'm machining the engine mounts from magnesium for Heineken II. I'm concerned about the magnesium chips igniting/exploding if vacuumed up with my shopvac, so I made a chip collector for my Bridgeport and just use a brush to remove the chips as it's milled. Regards Jeff
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Post by jetjeff on Nov 26, 2017 0:23:31 GMT -5
Hi Guys, Here are the nearly finished engine mounts. Machining magnesium is pretty straight forward, providing you take some safety precautions. I used relatively low spindle speeds (660 RPM) to avoid any chips igniting during milling. Regards Jeff
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Post by jetjeff on Nov 27, 2017 16:01:48 GMT -5
Hi Guys, Here are the finished engine mounts. Trying to shave weight off Heineken II as much as possible. As John Wallis has said before, "unless you use the turbine to power something, you've only succeeded at building a room heater". It's one thing to build a working turbine, it's another to build a working turbine light enough to power an R/C airplane. Regards Jeff
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Nov 28, 2017 6:32:22 GMT -5
Nice parts Jeff. Even better when they're made of magnesium.
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Post by jetjeff on Nov 28, 2017 6:42:29 GMT -5
Thanks,
I'll spray them with a coat of clear lacquer in an attempt to keep them from oxidizing. 33% lighter than aluminum, if I ever make a 'super sized' engine one day, I'd consider making the front cover plate and diffuser from it.
Regards
Jeff
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Post by jetjeff on Dec 2, 2017 15:38:32 GMT -5
Hi Guys, I'm working on the front cover plate. Trying to make the cover plate and trumpet intake all out of one piece of aluminum. Still a lot more machining, but at least I made a dent in it. Regards Jeff
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CH3NO2
Senior Member
Joined: March 2017
Posts: 455
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Post by CH3NO2 on Dec 2, 2017 23:14:03 GMT -5
WOW! That's a nice block to hog out. It should make a nice part. At least with aluminum you wont need to keep welding goggles and a bad of sand next to you while machining the block.
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Post by jetjeff on Dec 4, 2017 6:04:17 GMT -5
Hi Guys, Making progress on the front cover, but still a ways to go. Anders was right, wood router bits do work well on aluminum as well as Delrin. Used the router bit to make the internal radius on the trumpet. Regards Jeff
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Post by jetjeff on Dec 4, 2017 6:04:34 GMT -5
Hi Guys, Making progress on the front cover, but still a ways to go. Anders was right, wood router bits do work well on aluminum as well as Delrin. Used the router bit to make the internal radius on the trumpet. Regards Jeff
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Post by jetjeff on Dec 5, 2017 0:45:21 GMT -5
Hi Guys, Close to done front cover plate. Regards Jeff
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Post by jetjeff on Dec 11, 2017 15:48:56 GMT -5
Hi Guys, I drilled and tapped the front cover plate, to the inner sleeve,,,so no screws disrupt the gas path. BTW, Heineken part I does not run with the aluminum compressor I made for it. I'll try putzing with it after I finish Heineken II. Regards Jeff
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Post by jetjeff on Dec 18, 2017 0:20:04 GMT -5
Hi Guys, Working on the inner liner to the burner can. Regards Jeff
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