Author Topic: Bugatti Typ 50 1/4 Scale model  (Read 35922 times)

Online sco

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #285 on: December 06, 2018, 12:56:41 PM »
Great work Michael.  The tool post grinder - any more pictures of that, what you use it for etc.

Simon.
Ars longa, vita brevis.

Offline Vixen

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #286 on: December 06, 2018, 01:50:21 PM »
Michael,

The new one piece Corian spark plugs look great.   :ThumbsUp: :ThumbsUp:

What type of coil are you now using? Do you know the output voltage? Some auto coils produce too high a voltage for our miniature spark plugs, which can make the plugs fail prematurely.

Please post the results of your tests and any developments

Mike
« Last Edit: December 06, 2018, 02:28:58 PM by Vixen »
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Online steamer

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #287 on: December 06, 2018, 05:21:30 PM »
I listened to a talk from Rollie Gaucher,  ...of Rollies Dads lathe alignment method fame.   He talked about making spark plugs using corian but its expensive    his comment was to bring a couple of models to the countertp shops, and theyll usually get so excited that theyll give you some off cuts for free.
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Online michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #288 on: December 07, 2018, 09:15:14 AM »
Mike,
at the end i was using an old Bosch Coil i had on the shelf. No idea what voltage it delivers.


In germany Corian is not realy expensive. On Ebay you can get rest pieces for a couple of euros.


Michael


Online michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #289 on: December 10, 2018, 03:01:33 PM »
So i did some calculations and the actual CR should be 5,95:1.
What do you guys think, is this to high? Will the engine run with CR 5:1?. This is Maybe better for the Sparkplugs.


What CR do you guys run with your working engines.

Michael
« Last Edit: December 10, 2018, 05:12:51 PM by michelko »

Online michelko

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #290 on: December 10, 2018, 05:16:03 PM »
All parts ready machined, still have to cut the Center electrode to length and glue them together.



Offline Roger B

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Re: Bugatti Typ 50 1/4 Scale model
« Reply #291 on: December 10, 2018, 05:18:49 PM »
I have tended to design around 8-1, but this does not include the volume in the sparking plug or it's thread.
Best regards

Roger