What engines are you guys using in your Pattern planes these days? I used to use Rossi 61 or OS 61. I've still got a few good OS 61. And a couple worn out Rossi engines. I used to use Kraft KM80 metal motor mounts, but they are no longer in production. What are you guys using these days? I still have a few kraft mounts in my shop, but would like to find out is now avaliable.
Thanks for the info.
JERRY

I can't say what most people are using, but I have found that Dave Brown, and Dubro glass filled engine mounts work well.

The only engine I am using are OS Max .61 FSR and OS Max .61 SF. Others are using Nova Rossi, YS , OS .65 , Saito, and etc. Some are even using Electric.

Frank

I made a soft mount system out of a Dubro (1060?) glass mount split in half. It will hold the new YS .61 Classic.

I'm still an old school guy. We always mounted our engines as solid as possible. I was taught that an engine that wasn't mounted solid was not as effecient as an engine mounted securely. Some modelers wouldn't even think of using a radial type mount and used hardwood engine bearers to let the fuselage absorb the engine vibration. Besides, most all the modern engines run pretty smooth. Like I said: this is what I was always led to believe and will probably never be convinced of anything different. Just my opinion.
JERRY

As we know, almost everything is a compromise; soft mounted engines probably give up a bit of power vs. a similar hard mounted engine but the benefits of soft mounts probably outweigh the power gain of hard mounts.

As usual, one scratches his fleas as he sees fit

Jim

I agree with Jim.
I will add that a hard mounted engine in a fiberglass fuselage will produce a lot of vibration that can be quite destructive.
I have a run the same engine in the same airframe (all wood) hard mounted and with a soft mount and I was unable to detect any difference in flight performance. The hard mounted version was definitely louder.

I guess I should have been more specific on my post. I just wanted to know what the name of the manufacturer of different mounts that people use, So I could check them out and pick the one I like the best. With nearly 200 people viewing this thread I expected to find at least a couple of manufacturers of mounts that I hadn't known about and might find interesting. I didn't expect this to turn into a pissing match over vibration and noise. I can decide that factor on my own. I guess all those other people viewing this post just like to catch up on all the latest BS rather than be helpful. Or then again, maybe they were just interested in finding out the same thing I was looking for.
JERRY

As Frank mentioned earlier, the Dave Brown mounts are fine. I use them and I also have used the adjustable split mount that Great Planes offers. Both work well.

Jeff Owens
President, SPA

Really now! From the tone of the question you asked, it sounded to me and to others that you have been out of pattern for some time. Pattern people are by and large some of the most knowledgeable and helpful around. But we all have opinions; it's the nature of the game we play. So why are you shooting the messengers?

I think you got a few very good answers on what available today. Choose and move on

Thanks Frank and Jeff for your information. Like I said before. I'm just looking to expand my knowledge of what's avaliable. I know there must be more than just those two. Like maybe tatone, I thought Al at J-Tec might have made mounts, and there must be some imports as these engines are used on the otherside of the world.
I don't understand why Matt thinks I was shooting the messenger. I'm simply trying to get some different choices of mounts. So far I've only been told of two, both of which I've currently have on a couple different airplanes. If I offended anyone I am sorry.
JERRY

Jerry if you are looking for metal mounts, check out the accessories
page over at MECO: http://www.mecoa.com/acc/index.htm

Bill D.

Thanks Bill,t'
This is what I'm looking for. I checked them out, and they show a pattern 60 mount but don't list it on their price list so I guess I'll give them a call. I have a lot more luck talking to someone than I do typing.
Thanks again
JERRY

Hoping not to throw wood to the flames, I'll add that OS makes nice aluminum mounts albeit a tad expensive. The 905 mount fits a wide range of OS engines in the 60 to 90 displacement either two or four stroke as well as all the Rossi and NovaRossi two strokes in the same displacement class. Basically the mount has a 25 mm bolt spacing on the lug which matches a number of pattern engines with the other set of engines having a 20 mm spacing (e.g., YS, Enya, Webra, etc) - these engines don't fit.

The mount itself can then be either hard or soft mounted... ;-)

David

Yes the OS mounts are a tad pricey, but they are machined and not cast (like the old CB mounts) and pretty bullet proof. If needed you can drill and tap more holes in them; I've done it, but I always use the rear holes and just add holes for the front mounting lug bolts. And yes, you can soft mount the entire OS mount by using Lord mounts to mount the engine mount to the airframe <too many 'mounts' in that sentance>
Good Call, David!

Will, have you had a problem drilling the front holes for 20 mm spacing 60 class engines (e.g. YS) on the mounts? Do they not end up being too close to the existing front OS holes? With a 5 mm center separation, perhaps that's just enough without the existing holes posing a problem.

Their quality is indeed excellent if perhaps also a little heavy compared to composite mounts.

David

I use 4-40 bolts on the front which are slightly offset towards the front to provide a little more distance between hole centers. Make sure the holes drilled are perpendicular the the mount surface (I use a jig) and tap carefully.

I've gotten away from aluminum mounts, and favor glass/nylon mounts for their ease of use. They are also 'softer' and absorb some of the vibration before they transmit to the iso mount. Easy to drill and tap, sand and cut, lightweight, cheap, available, etc. I've used them up to 120 size without failures of any sort. What's not to like?