Here is a 7 Cyl 90 cc Radial engine running video by Matthew during break in.

UMS 90cc Radial (5 min 38 sec)

Thank you
Adrian

I wonder if they will come out with some boxers?

Is that Van Morrison in the background? And why does it run cooler with 100 octane? How often you gotta lube those open rockers? I do like me some radials, though.

Hold on, I thought Horizon was selling UMS as the evolution brand, whats going on here?

Originally Posted by Alkaline

Hold on, I thought Horizon was selling UMS as the evolution brand, whats going on here?

I would guess a deal fell through with Horizon. just a guess though.

So are these modified glow engines?

They are also working on the Inline 2,3,4 cylinder. I will know more in the Fall when I go to the factory. I will look to see the boxer option but that will have to be a study of demand. Will be based on existing parts .

Horizon Hobby still handle the Evolution brand that is their brand and mostly GLOW.

The UMS is based on the same design but redesigned for Gasoline operation, more improved .

Machined heads from AL stock not cast.
Valve seats inserts to support higher temps from gas operation.

Bigger cooling fins on the cylinders,

Stronger cams materials and heat treatment process.

Working now on NEW CDI's between CH and Rcxel that we develop as we speak and test.

ALL the North America service and parts will be trough CH , I will do the service and parts.


Thank you
Adrian

Originally Posted by woodendesk

I would guess a deal fell through with Horizon. just a guess though.

And I thought that the UMS was connected to/ or a derivative of Seidel? But I looked it up and Seidel seems to still be operating as as separate company....

Interesting but quite confusing we have 3 companies now selling essentially the same motors

Horizon hobby as evolution
Ch ignitions as ums
Sidel as ?

Originally Posted by Alkaline

Interesting but quite confusing we have 3 companies now selling essentially the same motors

Horizon hobby as evolution
Ch ignitions as ums
Sidel as ?

Yes and NO.

UMS are gasoline engines with CDI's. and a NEW line of 5 CYL Gas .
Evolutions are GLOW and you have the 160 and 260 7 cyl gas but looks different.
Sidel...not sure what they do this days I heard all kinds of stories...
But confusing as it is...be glad that you have choices .
Before you had Moki ... mostly 5 cyl, big $$$ the only kid in town.
Now you can choose

Adrian

Originally Posted by CH Ignitions

Before you had Moki ... mostly 5 cyl, big $$$ the only kid in town.
Now you can choose

Adrian

Let's not forget the Valach 250 and 420, but like Moki, a bit expensive for most. I most definitely would try one of yours if there was a boxer, those are the style I run. The one in my Avatar has a Valach boxer in it.

I had one of the UMX 260cc motors from Horizon... constant problems with oil leaks, and the motor never ran consistently... great one day, very sluggish the next. I never got the motor off the ground, sold it and put a Moki on my plane... problem solved. I hope UMX worked out their problems, from what I read, there were a lot of people with the same problem as me.

There was a much improvement, it is a difference between the the 2.

Glad to hear that! They are great looking motors, and it will be good to have options for radial engines.