Ooh. Too soon.![]()
Don't you look at my accountant.
He's the only one I've got.
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Transfers have removable covers and the transfer windows are CNC machined so that they are radially and angularity are symmetrical and match each other.
So for those wondering if screw top pistons, trapped "L" shaped rings and exhaust port floor dams are real. Then this is one cylinder where these features have been made to work.
I produce engines for amateur aviation, for customers like this https://www.fulcrum-engines.com/
I had a problen when at -28C original Moto Tassinari V-Force carbon petal in the center were broken and made some further damages.
It happen at 6 hours 40 minutes of permanent work at 6700rpm. It happen first time, but I very offset and dont want it happen again.
I will try make 0.4mm kevlar petals as instead of carbon in this valve.
-28C is the air temperature at 4000m., assuming a ground temp of around 0C. (like say.. mean Winter temp in Ukraine)
Specified operating altitude of a Shahed drone is 60 - 4000m.
I really hope I'm just a bit paranoid, but Russia's brutal and criminal assault on Ukraine Must Not be supported.
Slava Ukraini!
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Lets not point the finger at each other but save it for the politics that shook the jar and got the ants fighting.
I have a friend who is having problems with a yz250 based kart engine running on methanol. Peak up is at 9250. This is the ignition curve he has.
I think it’s too much and does not drop off.
He had melted pistons. Egt is getting to 620
An I on the right track to help him?
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Yes. Peak up is meant to be peak hp. Dumb auto correct
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The ignition is way too advanced , but that can be corrected by reducing the static setting - such that you get 15* at peak HP rpm.
But besides that issue , any engine that sees over 600* egt on Methanol is WAY too lean and WILL seize immediately.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
Depending on compressionratio 15degree might be low try ~17-18degree if having oem compressionratio.
BUT!! richen it up a LOT!
I´ve seen best results with methanol at ~430degree exhaust temp.
And by doing this you probably need to build a new pipe to get the peak at the same rpm.(shorter pipe for methanol engines)
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