GIJon

My Feedback: (118)

Yes they ship direct via Fedex. Shipping was more than the rings, but still reasonable. I have not looked at the tracking, but will post shipping time once I receive the shipment.

Linkan2

Here is a German website that has the updated UMS enginee

https://tomahawk-aviation.com/eu/search?sSearch=ums
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Lars

GIJon

My Feedback: (118)

It is a second set. Debating on putting both rings on but there may be a reason they did not at the factory. May be too much compression for the bottom end.

tdevince

Tomahawk doesn't have them in stock. I talked to Horizon, they have the updated as well as the previous edition in their remaining stock. But they said there is no guarantee which you will get if you order from them. So if I get one, I will probably order direct from UMS website.

GIJon

My Feedback: (118)

I checked the Fedex tracking. My parts were picked up on 1-22. Tracking says possible delivery today or tomorrow. That's pretty quick.

EQ1

Let me say: UMS has really good customer care. I had the problem of a brocken backplate of an EVO160 after a crash. Mr Ramaraj from UMS (you will find the link to him in the history of this thread) was very helpful. I got my spare parts with no hasle for a reasonable price. Horizon was no help. No answers, incompetent people! Horizon is/was just trying to make money out of us.

GIJon

My Feedback: (118)

Received my rings from UMS yesterday via Fedex. Not bad...about 1 week shipping time. Total time withe money transfer and shipping about 10 days.

EQ1

Concerning the distribution of UMS engines in Germany/Europe by Tomahawk Aviation: I asked them about the availability of these engines and they told me, that they are never on stock and just ordered on demand. Time to delivery will be 3-4 weeks. So: bummer! You can buy directly from India!

Fulcrum2111

I have had to make a new backplate for my 7-35 because the aluminum plate was bending from the engine thrust. I had installed it as the instructions say, in a flat surface. I have replaced the plate by a replica I have made from steel.

barzini

My Feedback: (4)

Hello,
What size brass tank tubing and fuel line are you guys using for the 7-77 radials?
Thanks,T.C.

cymaz

Manual says 3.5mm ID...I’m sure I used that.

barzini

My Feedback: (4)

Hello,
Im getting ready to break in a 7-77 radial.What oil do i mix with the straight methanol?
Thank You,Tony

slskn

My Feedback: (4)

In my fuel I use klotz oil got it about 8% using about 5% Nitro

BobH

My Feedback: (2)

barzini

My Feedback: (4)

Yes,I would but the manual says use Straight Methanol and oil for breakin.I have 15% percent glow mixed with methanol now.Are you saying i can use that to break in a new engine?Which Klotz? Theres so many.

BobH

My Feedback: (2)

I used 5% methanol plus straight ethanol with no ill effects.
I'm not sure about 15% meth.

slskn

My Feedback: (4)

[QUOTE=BobH;12417568]I used 5% methanol plus straight ethanol with no ill effects.
I'm not sure about 15% meth.

slskn

My Feedback: (4)

Just wondering if anybody still discussing the topic on these engines??

barzini

My Feedback: (4)

Yes,Lets keep it going.I really like my Evolution radials.

slskn

My Feedback: (4)

Had some questions about the 9 cylinder. For Tom ( maxaim), just haven't heard from him or anybody else on this thread looks like that nobody's had anything to say since March

barzini

My Feedback: (4)

Whats your question? Maybe i can help.

cymaz

slskn

My Feedback: (4)

Well I just maidened my new ziroli Corsair and one of the pushrods fell out so I put another rod and cam follower in it and adjusted it, took it out a couple days later the one stayed in but two more push rods fell out on other cylinders so I spent 4 hours adjusting the push rods at .004 all the way around ready to try for the 3rd test flight also checked all the compression on each cylinder and got between 120 and 125 on a couple of them and over a hundred forty on the rest of them also switch props went from a 26x10 2 Blade at 4950 RPMs to a 25x10 3 blade turning 4200 to 4300 RPMs wanted to bring the RPMs down to keep the RPM's down in a dive so it wouldn't float the pushrods. Hopefully that combination will work

Maxam

My Feedback: (62)

Steve, I sent you a PM. I am now seeing that all private reply's are not sending! Great. Well anyway sorry about not seeing your message. The larger prop is my first idea like you did. Make sure the gap on the tappets is for the highest cam due to the not perfect concentricity of the cam ring. Also I have settled on 10% oil in my fuel. Oil those valve stems!

Maxam

My Feedback: (62)

Guys, I will try to become more active on this thread. I am still very active with all my radials! -Tom