Author Topic: Rotax 912 1:2 scale model engine build .  (Read 1050 times)

Offline Charles Lamont

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Re: Rotax 912 1:2 scale model engine build .
« Reply #15 on: February 14, 2021, 10:28:17 PM »
Very nice looking casting, and seems to be machining well too.

Offline ThomasM

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    • My modelengines
Crankcase 90 % finished.
« Reply #16 on: February 22, 2021, 04:26:59 PM »
Hello everyone,

I made good progress on the machining of the crankcase. To keep you updated i made some pictures.

While i am waiting for the ordered brass material for the main bearings i started working on the next patterns for the propeller reduction drive and back cover of the engine.

The pictures :

1. Original engine
40: Fixture for clamping the two crankcase halfes in the same position repeatable.
41 - 45 : Machining
46 - 49 : Finished crankcase
 
« Last Edit: February 22, 2021, 04:32:32 PM by ThomasM »

Offline ThomasM

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Crankcase 90% finished
« Reply #17 on: February 22, 2021, 04:29:19 PM »
47 , 48 : Finished crankcase
49 : Original crankcase and model

Best regards ,

Thomas

Offline Admiral_dk

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Re: Rotax 912 1:2 scale model engine build .
« Reply #18 on: February 22, 2021, 07:03:08 PM »
Very nice progress  :ThumbsUp:

It's more complex than I originally thought - but your remark about it being finished, did not match my expectations about the number of holes etc. that needs to be drilled in the Crankcase, and seeing it next to the original confirms that  ;)

Per

Offline dieselpilot

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Re: Rotax 912 1:2 scale model engine build .
« Reply #19 on: February 22, 2021, 08:52:57 PM »
Excellent work! I may have missed how you finished the pressed surfaces of the journals and webs. Were these also hard turned like the front shaft?