4-stroke engine recommendation
07-24-2013, 09:10 AM
#26
Thread Starter
RE: 4-stroke engine recommendation
ORIGINAL: bogbeagle
Do any of you blokes know how to calculate the amount of power produced by this engine ... 10,800 rpm on a 9 x 6 ?
Obviously, you can only estimate; but it would be interesting to have a figure.
Do any of you blokes know how to calculate the amount of power produced by this engine ... 10,800 rpm on a 9 x 6 ?
Obviously, you can only estimate; but it would be interesting to have a figure.
Alberto
07-24-2013, 11:47 AM
#27
RE: 4-stroke engine recommendation
Alberto, I really think you shouldn't be using a 6 inch pitch on that little 4 stroke, it is just not efficient for what you are trying to do.
Sounds like you need to fix the valves or get a better engine. I actually flew a Lazy Tiger at 4 lbs 6 oz, i.e., 70 ozs, with an OS 26 FS. It was underpowered, but I flew it inverted and did mild aerobatics that way, so a 52 oz plane, more than a pound lighter, should fly decently on your 30 FS if it is running well. I used a 10x4 prop.
Trying the Norvel is not a bad idea, if it's not a lot of work to install.
Jim
Sounds like you need to fix the valves or get a better engine. I actually flew a Lazy Tiger at 4 lbs 6 oz, i.e., 70 ozs, with an OS 26 FS. It was underpowered, but I flew it inverted and did mild aerobatics that way, so a 52 oz plane, more than a pound lighter, should fly decently on your 30 FS if it is running well. I used a 10x4 prop.
Trying the Norvel is not a bad idea, if it's not a lot of work to install.
Jim
07-24-2013, 12:46 PM
#28
Thread Starter
RE: 4-stroke engine recommendation
The Norvel has the same bolt and crankcase spacing as the MAgnum. Only PITA is that I need to fashion an extender for the muffler to clear the firewall. The Norvel has an unusual bolt spacing on the muffler, so I'll need to get hold of a piece of aluminum stock and drill out the extender... Should not be too difficult.
Alberto
Alberto
