From us internet trolls, lol. I must give you credit for putting yourself and your ideas out here to be admired and criticized. You may have give the aviation community a viable option. There is a void left behind from Rotax and your design is now one to be consider. Low cost, 4 cycle, ease of maintenance & operation and support from the manufacturer. There are always going to be critics but you are willing to put your name out there and for that I commend you. That’s why I use my name on my posts and not some facade or alter-ego creation. I look forward to your flight testing because I believe you have chosen one of the safest platforms to fly with. Great job! Love your neighborhood too!!
Anybody that says a chain is not up to the task has never worked on a vehicle either. The vast majority of vehicles on the road today have a timing chain that is not as big as the one you’re running your prop with. Those see higher RPMs and more strain than yours will ever see. Great work!
You might look at the "O Ring" chain. I put some of that expensive chain on a 1200cc motor cycle and it went 12000 miles showing virtually no wear. Thanks for your experience with the Kohler engine.
I was thinking the same thing. No lubrication needed with an o-ring chain, aside from some occasional silicone spray to keep the o-rings pliable. A standard chain will wear out eventually, especially without lubrication. Good thing is, in the sky there's no sand, and won't be any grit-laden moisture to deal with, so even a standard chain might last quite a while.
Avid motorcyclist, my Yamaha FJ1200 will go 30K miles between replacement of chain and sprockets. Like anything mechanical it requires regular maintenance. Chain lube every 500 miles, and kerosene bath and still bush clean before adding new chain lube.
I got 26k miles out of the OE non o-ring chain on a '94 CBR600F2 back then, but I was meticulous with maintenance. I used to buy chain lube by the case. :) EDIT - actually I think that was an o-ring chain (my memory sucks these days ...)
What kind of mods did you have to do to the engine where it will hold 5,000 rpm for a long time? Most Kohlers redline a little over 3,500 stock. 5,000 seems like it would be pushing it pretty hard.
He changed the flywheel from stock cast iron to aluminum with I think about an eight pound saving as well as changed the spark system to eliminate the RPM limiter.
Can you explain how you took care of thrust loads on the main prop hub shaft. Doesnt the prop try to pull the shaft forward as it make thrust? I am trying to make a PSRU for a smaller 4 stroke. Any help would be appreciated. Thanks
From us internet trolls, lol. I must give you credit for putting yourself and your ideas out here to be admired and criticized. You may have give the aviation community a viable option. There is a void left behind from Rotax and your design is now one to be consider. Low cost, 4 cycle, ease of maintenance & operation and support from the manufacturer. There are always going to be critics but you are willing to put your name out there and for that I commend you. That’s why I use my name on my posts and not some facade or alter-ego creation. I look forward to your flight testing because I believe you have chosen one of the safest platforms to fly with. Great job! Love your neighborhood too!!
Anybody that says a chain is not up to the task has never worked on a vehicle either. The vast majority of vehicles on the road today have a timing chain that is not as big as the one you’re running your prop with. Those see higher RPMs and more strain than yours will ever see. Great work!
Great video along with common sense, mathematics, and great imagination, and ingenuity! Bravo!
You might look at the "O Ring" chain. I put some of that expensive chain on a 1200cc motor cycle and it went 12000 miles showing virtually no wear.
Thanks for your experience with the Kohler engine.
I was thinking the same thing. No lubrication needed with an o-ring chain, aside from some occasional silicone spray to keep the o-rings pliable. A standard chain will wear out eventually, especially without lubrication. Good thing is, in the sky there's no sand, and won't be any grit-laden moisture to deal with, so even a standard chain might last quite a while.
Avid motorcyclist, my Yamaha FJ1200 will go 30K miles between replacement of chain and sprockets. Like anything mechanical it requires regular maintenance. Chain lube every 500 miles, and kerosene bath and still bush clean before adding new chain lube.
I got 26k miles out of the OE non o-ring chain on a '94 CBR600F2 back then, but I was meticulous with maintenance. I used to buy chain lube by the case. :)
EDIT - actually I think that was an o-ring chain (my memory sucks these days ...)
And classes start when...??!! 😊😊👍👍👏👏
You not have any carb icing issues with that set up? Had to duct warm air from a heat exchanger on exhaust to stop it being an issue here in UK.
What kind of mods did you have to do to the engine where it will hold 5,000 rpm for a long time? Most Kohlers redline a little over 3,500 stock. 5,000 seems like it would be pushing it pretty hard.
He changed the flywheel from stock cast iron to aluminum with I think about an eight pound saving as well as changed the spark system to eliminate the RPM limiter.
Can you explain how you took care of thrust loads on the main prop hub shaft. Doesnt the prop try to pull the shaft forward as it make thrust?
I am trying to make a PSRU for a smaller 4 stroke. Any help would be appreciated. Thanks
Are you in part 103 compliance for weight? I was looking at the same motor, but was worried about being over weight.
How do you handle the oil system?
have you flown it?
there you have your answer
Yeeeeah, he gon' learn why you don't drive a chain without torsional dampening from the engine...