nonstoprc

My Feedback: (90)

Hi,

I am new to gas engines and wonder if it makes sense to soft mount a DA50 on a Wild Hare Edge 540. I have good luck with Hyde mount on pattern ships with YS engines.

Has anybody used Hyde mount on DA50 or other 50-size Gasers? If so, what kind of mount was used? Does it require a nose ring? Is the mount working?

Thanks

CAP232CM

My Feedback: (8)

Soft mounts are not required for gas engines and I recommend you do not use one on this plane.

airega1

My Feedback: (204)

Sorry but I must disagree with CAP232CM soft mounts are indeed used on gassers, especially a single cylinder gasser. I don't see many guys using soft mounts on a twin cyl. I will say this to credit CAP232CM, all the new generation gassers, DA50, The ZDZ's, BME55 etc. do not have the vibration problems that the older big gassers had. Either way you go you should'nt have a problem especially with a DA50

JB Rekit

My Feedback: (3)

You guys are both right, kinda.

No, it is not NEEDED. The plane will not vibrate itself apart in a few flights without one, but you airframe and electronics will last 2-4 times longer with a Hyde Mount.

and no, you would not need a nose ring if you use his type "B" mount.

John

GoeKeli

My Feedback: (18)

DA recommends against it sort of. here is what is says in my DA50 manual,
"Soft mounts can be used, but movement of the engine can cause problems with exhaust systems and carb linkages."
Nonstop, why do you feel you need it? The DA50 can be made to run very smooth. The transition is almost like an electric motor after I took Ralphs advice and tweeked the needles.

Joe

Geistware

My Feedback: (16)

I would have more concerns with the hi-frequency RPM of a glow engine than the lower frequency RPM's of a gas engine. While a soft mount is a great conversation builder, at 7000rpm, it is not prudent.

JB Rekit

My Feedback: (3)

Goekeli brought up a good point.
If you have your canister or tuned pipe strapped down, or bolted to where it cannot move at all, then you can crack your headers if you are using stainless steel header pipes (aluminum doesn't seem to have the same problem).

The way I do it and a lot of other people w/ a soft mount is to use the 1" teflon tubing and support the can in three or four places so that the can has about as much room to move as the soft mount does.

Geistware

My Feedback: (16)

I don't think I have ever heard of a can being hard mounted to the plane without a soft coupling between the header and the can.

Hannu Vuorinen

Toni Clark Gmbh supplies a range of soft mounts. By experience, they are highly recommended for gas motors.
http://www.toni-clark.com/

JB Rekit

My Feedback: (3)

The soft coupling does no good as far as keeping your headers from cracking w/o soft mounting your cans as well when a soft mount is being used.

I haven't heard of anyone joining their header and pipe any other way. It is how you mount the can that matters. You can use another soft coupler and cut in in two to make C shaped pieces to give your can some suspension.

bob_nj

My Feedback: (62)

Are the Clark mounts only available for DA engines_bob

Kjell Aa

Nope.
They're available for the Zenoah G45 & 62 only.

bob_nj

My Feedback: (62)

Drats

Marcos_Nieto

Hi guys....I´m also new to gas engine and I´m installing a QUADRA 42 on my new GP Pitts.
I´ve heard a lot of good and bad things on soft mounts....so I decided to go without it. I´m about to finish with the engine installation process but want to make sure that I´m on the right track........I pinned and glassed the firewall. Also I used 1/4 ply triangles as internal firewall reinforcement(used a total of twelve).
But the answers to NONSTORC original post confuses me more than I was before....[:@] on using soft mount on gas engine you are either right or wrong.......one of the two alternatives should be better in most gas engine cases. Probably there are some exceptions that confirms the rule, but in my case is it worth to use a soft mount????
Any advise is welcome
Thanks

Marcos

Silent-AV8R

I would be absolutely fascinated to see the data that supports this opinion!!!

Bill

tande

My Feedback: (48)

Ditto!

coreymotel

Soft ,ounts are absolutely not required for a gasser. The airframe will dissipate the vibration the engine produces, and do it safely.

From time to time you'll see someone running an engine on an airplane without it's wing attached.

Not a good idea! A word of caution here.

Never run a gasser, or large glow engine, without the wing attached to the fuse. In this situation you can damage your stab, as well as possibly the fuse.

rmh

Last week a friend fired up his big H9 ARF bipe -with a 150 engine . and without the wings -
I have never seen that much stab shake without destruction .
Nasty--
anyway - mass balance and flywheel control is what reduces most low end shake on these one pulse per rev engines - singles OR twins.
My new 80 single -on a H9 Extra - can be nicely run up with a Mejzlic 26 x10 .- without the wings - there is some stab shake but
with the wings on - NO visible surface shake anywhere at any revs .
you can feel it along the elevators but no visible shake.
As for the soft mounts
Look at those that really control shake - the engines hardly move.
On 4 stroke singles (the worst) the engine has to float at idle to reduce the hammering.
Some older gas design engines really are shaky at low revs but clean up well at high revs .
Aluminum headers will break readily from soft mount setups .
seen a lot of em do it .