OMP 80 inch Edge Gas Engine Question
I have a couple of questions regarding which gas engines to use with the OMP 80 inch Edge ARF. My first question is will the airplane still 3D well with the extra weight of a gas engine? Also, the OMP site recommends using beam mounted engines in the range of 30cc to 40 cc along with suggesting an RC Showcase 180 engine as a good engine. I went to the RC Showcase web site and did not see the engine listed. In general, most gas engines are going to four post mounts. Can you use a 4 post mount engine and what mods to you have to do? Also, are there any other mods you have to do to this plane when switching to gas engines other than the fuel lines in the tank? Are there any other good recommended gas engines for this plane either beam or four post mounted?
Posted on: 5/24/2009 8:34 AM by Author "edavis" in the forum "OMP - Ohio Model Products Support Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8794108

RE: Pacific Aeromodels Laser 120
Folk, I have a Pacific Aeromodel Lazer 120 with a Saito 125a four stroke and I have a few questions regarding mounting the motor. I'm new to mounting a motor in a cowling and could use a few tips. I'm looking at the plane, like a pilot sitting in the plane, and the throttle servo tray is on the right side. My motor has the throttle linkage on the right side and the needle valve/exhaust pipe on the left side. If it try to mount the motor upright I have to put a big hole in the top of the cowling for the cylinder head and I need to move the throttle tray to the left hand side. If I mount the motor sideways with the head to the right side of the plane, the exhaust and needle valve come out the bottom (this seem like a bad position for a needle valve) and the throttle tray lines up. If I mount the motor with the head to the left side, the exhaust/needle valve come out the top, but the throttle linkage does not line up, which will require some rerouting of throttle linkage wire (which is not so bad). So, I'm not sure which way to mount the motor. Also, if I mount the motor sideways, will the carb be too low for the tank and cause any fuel flow problems? Additionally, how do you determine the right position for the motor mounts on the firewall to get the right centerline and distance from the front of the cowl. Any pictures or ideas would help. Finally, what prop should I run with the Saito 125 since I live at sea level. Thanks Eric
Posted on: 2/14/2007 5:11 PM by Author "edavis" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=5419168