Ryobi engine mount
04-14-2009 | 04:40 AM
#1
Thread Starter
Ryobi engine mount
I have had great success with my Ryobi (XYZ) ignition ,swings a 20 x 10 and idles at 1000 RPM.
I am interested to find out how many engines are mounted solid to the firewall and how many are rubber mounted.
My motor has rubber cushions on the stand off's but I have been recently told this reduces the power of the engine when compared to a hard mounted engines.
Any comments on this?
I am interested to find out how many engines are mounted solid to the firewall and how many are rubber mounted.
My motor has rubber cushions on the stand off's but I have been recently told this reduces the power of the engine when compared to a hard mounted engines.
Any comments on this?
04-14-2009 | 12:02 PM
#4
Senior Member
Joined: Mar 2009
Posts: 237
Likes: 0
Received 0 Likes
on
0 Posts
From: Branson,
MO
RE: Ryobi engine mount
Very few model aircraft have rubber engine mounts, whether they are Ryobi powered or not. Rubber mounts will definitely reduce airframe vibration noise from the engine but as far as engine performance, there may be some truth. I've seen modelers use rubber mounts for their novelty, just to remove them later. That should tell you something.
If you decide to test rubber engine mounts, post your performance results.
If you decide to test rubber engine mounts, post your performance results.
04-15-2009 | 12:53 AM
#5
My Feedback: (49)
Joined: Oct 2002
Posts: 1,158
Likes: 0
Received 0 Likes
on
0 Posts
From: Superior,
AZ
RE: Ryobi engine mount
Real race cars have to put torque to the rear wheels.
If i tromp into my 350 with an Eldebrock intake and 4 BBL on my truck you can see how much the engine raises up on the rubber mount.
Unless you want to burn rubber with your landing gear it doesnt seem to matter.
I have used both on my conversion engines.Solid to firewall,and with some 1/4 inch and 3/8ths inch rubber washers behind standoffs and flat mount.Didnt have any performance diiferrence that i could tell.
I couldnt afford solid motor mounts when i was in high school so we used a short piece of chain bolted to the block,then to the frame and left the rubber one there as well.Only needed one on the drivers side for the torque.
So unless you want to burn rubber or get a hole shot and go vertical in 5 feet on takeoff,i personally would do what you want.
If i tromp into my 350 with an Eldebrock intake and 4 BBL on my truck you can see how much the engine raises up on the rubber mount.
Unless you want to burn rubber with your landing gear it doesnt seem to matter.
I have used both on my conversion engines.Solid to firewall,and with some 1/4 inch and 3/8ths inch rubber washers behind standoffs and flat mount.Didnt have any performance diiferrence that i could tell.
I couldnt afford solid motor mounts when i was in high school so we used a short piece of chain bolted to the block,then to the frame and left the rubber one there as well.Only needed one on the drivers side for the torque.
So unless you want to burn rubber or get a hole shot and go vertical in 5 feet on takeoff,i personally would do what you want.
04-15-2009 | 03:23 AM
#6
My Feedback: (27)
Joined: Mar 2004
Posts: 1,450
Likes: 0
Received 0 Likes
on
0 Posts
From: Woodland,
CA
RE: Ryobi engine mount
I'm with buck on this one.
I have a US 35 mounted on a rubber motor mount and it just runs smoother, as in less vibration.
No noticeable power loss and a lot less vibration.
By the way Tony Clarke makes a mount with a cable in it to limit the rubber mount's movement.
So there probally is some power loss at full power, especially when a lot of throttle is applied all at once.
I have a US 35 mounted on a rubber motor mount and it just runs smoother, as in less vibration.
No noticeable power loss and a lot less vibration.
By the way Tony Clarke makes a mount with a cable in it to limit the rubber mount's movement.
So there probally is some power loss at full power, especially when a lot of throttle is applied all at once.
