11-08-2015, 11:05 AM
Hi all thanks for the comments.
Perhaps I have been so wrapped up getting the design right I forgot to mention that capacity of each cylinder is 12.7 cc. total capacity 63cc.
Most of the air cooling is in the head area and will be subject to the full blast of the prop on the thrust side of the cylinder and the exhaust area so I think this will be OK . because the oil system is a spit and hope type a fair bit of oil will be thrown about inside so this will add to the cooling.
. Pete. I cut the fins when the stock was straight because I was afraid the slitting saw may drift to one side as it started to cut
on a taper ?? Just my double breasted yellow stripe showing.
Tom the fins and spacing is .08" .
Brian.
Perhaps I have been so wrapped up getting the design right I forgot to mention that capacity of each cylinder is 12.7 cc. total capacity 63cc.
Most of the air cooling is in the head area and will be subject to the full blast of the prop on the thrust side of the cylinder and the exhaust area so I think this will be OK . because the oil system is a spit and hope type a fair bit of oil will be thrown about inside so this will add to the cooling.
. Pete. I cut the fins when the stock was straight because I was afraid the slitting saw may drift to one side as it started to cut
on a taper ?? Just my double breasted yellow stripe showing.
Tom the fins and spacing is .08" .
Brian.
