Q about Jason's radial

altidsulten Mon Feb 06, 2012 8:17 am

Hi,
I just clicked the picture of Januarys winner, and what a nice engine!
Looking at the drawing thats below the picture, just got me wondering how it fills its cylinders?
As i see it it will never create a vacuum "inhale" the air/fuel mix?? (the pressure in the crankcase will stay the same)

So how does it work?

Regards
Thomas Pedersen

SuperDave Mon Feb 06, 2012 9:35 am

Good question Thomas.

I was wondering the same thing.

dirk gently Mon Feb 06, 2012 9:47 am

Aren't these actually 3 separate engines in one case, like this one:
https://2img.net/r/ihimg/photo/my-images/214/tripcecox.jpg/
?

SuperDave Mon Feb 06, 2012 9:54 am

Dirk:

The three-cylinder shown is three separate engines cooridinated by a gear system. Jason's doesn't have a gear system.

nitroairplane Mon Feb 06, 2012 11:56 am

As previously discussed it would need a blower to run.
Indra

**Cribbs74** Mon Feb 06, 2012 11:56 am

Vacuum would be created during the upstroke of each cylinder so assuming there is a crankshaft and moveable pistons there will be vacuum.

Automobile engines draw air into the cylinders during the intake stroke, so I think Cox engines work the opposite and draw air and fuel during the compression stroke. I could be backwards either way there will be a vacuum.

altidsulten Mon Feb 06, 2012 12:39 pm

by nitroairplane on Mon Feb 06, 2012 6:56 pm

As previously discussed it would need a blower to run.
Indra
Sorry, did not read the post about the blower, but yes that was the only way i could think of that would make it work. I have benn doing some experiments with my own V-Bee.

by cribbs74 on Mon Feb 06, 2012 6:56 pm

Vacuum would be created during the upstroke of each cylinder so assuming there is a crankshaft and moveable pistons there will be vacuum.

Automobile engines draw air into the cylinders during the intake stroke, so I think Cox engines work the opposite and draw air and fuel during the compression stroke. I could be backwards either way there will be a vacuum
There would be no pressure changes in the CC as the 3 piston will compensate for each other (1 goes up but the 2 others goes down and would equalize out the vacuum created by no.1)

nitroairplane Mon Feb 06, 2012 12:44 pm

Yes I have seen yours on YouTube.
Do you sell them?

altidsulten Mon Feb 06, 2012 1:16 pm

by nitroairplane on Mon Feb 06, 2012 7:44 pm

Yes I have seen yours on YouTube.
Do you sell them?

I had the intention of making a short run of maybe 5-10 crankcases, but time is the limiting factor!
2 little girls (it seems like they have been sick all this winter), serious plastic modelling, R/C warbirds, 2 old Triumph MC's and rebuilding our house has taken alot of my sparetime!
But after joining this group in December i have been thinking of it again.

Regards
Thomas

altidsulten Mon Feb 06, 2012 1:19 pm

By the way, i do not hope you have been one of them that has been asking questions on youtube. I never figured out how to answer them!

nitroairplane Mon Feb 06, 2012 1:48 pm

altidsulten wrote: by nitroairplane on Mon Feb 06, 2012 7:44 pm

Yes I have seen yours on YouTube.
Do you sell them?

I had the intention of making a short run of maybe 5-10 crankcases, but time is the limiting factor!
2 little girls (it seems like they have been sick all this winter), serious plastic modelling, R/C warbirds, 2 old Triumph MC's and rebuilding our house has taken alot of my sparetime!
But after joining this group in December i have been thinking of it again.

Regards
Thomas

Ah yes I hope they are better now!
It is a very nice engine, if you do decide to sell let me know!
Indra

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