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03-24-2019, 11:51 PM
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#51 |
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RCC Junior Contributor
I am: Gregg L
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Re: Making a 2 stroke into a four stroke (seriously!)
Hi Andrew
I miss a few days and you almost have it running. I'll be watching with great interest Cheers Gregg
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03-27-2019, 05:36 PM
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#52 | |
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RCC Supreme Contributor
I am: Andrew Coholic
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Re: Making a 2 stroke into a four stroke (seriously!)
Quote:
Gears need to be finer pitch, for better adjustment. The cams are too conservative, open times are too short and not enough overlap The head design is OK but needs better access to the glow plug as I couldn’t tighten it adequately The rockers need to be made from steel and less slop. On the plus side, I did learn a lot about this for my first attempt. My valves actually seal pretty well and this was my most worriesome thing to attempt. I know I can do even better though. Again, the way I learn things is to start with a crazy idea and no real plan, and go at it! Learn what works, what doesn’t and then try again. I will try again, and I know the next time will be better!
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Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it! |
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03-29-2019, 11:09 AM
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#53 |
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Re: Making a 2 stroke into a four stroke (seriously!)
The fact that it's running is a win!
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03-29-2019, 12:04 PM
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#54 |
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Re: Making a 2 stroke into a four stroke (seriously!)
That's pretty cool, congrats on the success . I found using aluminum push rods helped the RPM lots too . .
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03-29-2019, 04:48 PM
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#55 |
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Re: Making a 2 stroke into a four stroke (seriously!)
I'm speechless. That it truly amazing. I love the sound of it too. I have to ask. I am assuming that it was at idle? Do you or did you want it to put into a plane, or just for static bench running for your pleasure?
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03-29-2019, 06:26 PM
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#56 | |
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RCC Supreme Contributor
I am: Andrew Coholic
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Re: Making a 2 stroke into a four stroke (seriously!)
Quote:
It’s a start though. I’m going to definitely revisit this. I have lots of metal and just need time. I’d like to get it running as well as a bought engine, whether it flies or not although I’d like to maybe use it on one of my old timers.
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Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it! |
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03-29-2019, 06:39 PM
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#58 | |
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RCC Supreme Contributor
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Re: Making a 2 stroke into a four stroke (seriously!)
Quote:
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Andrew Coholic -MAAC #26287L 1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's... if its got a wing or two and an engine - I like it! |
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03-30-2019, 09:56 AM
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#59 |
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Re: Making a 2 stroke into a four stroke (seriously!)
Try advancing the cam timing one tooth.
Pretty neat seeing this running.
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I know there's money in aviation........I put it there! |
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03-30-2019, 09:57 AM
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#60 |
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Level 3 Supporter
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Re: Making a 2 stroke into a four stroke (seriously!)
Try advancing the cam timing one tooth.
Pretty neat seeing this running.
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I know there's money in aviation........I put it there! |
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