RE: UMS Evolution Radial Care and Operation
 

What is your Cowl diameter?

RE: UMS Evolution Radial Care and Operation
 

hi folks,

recieved my triple 7 a couple of daxs ago and would l,ike to du the break in on a test stand at home in the carport. the problem is, winter is coming and it is only around 0 to 5 Celsius outside. Do you see any problems with that? i am rather referring to problems in the break in process than to problems starting it. the engine will be at room temp when I come out of the shop and immediatly started.

Thanks for a short reply,
rev

RE: UMS Evolution Radial Care and Operation
 

Make sure all seven cylinders are running. the engine will need to be very rich in the cold high density air. The cold will no hurt the engine. Three hours running in the cold will get it in good running order. Familiarization with the engine is what is also important. -Tom

RE: UMS Evolution Radial Care and Operation
 

Don't forget to oil up the rockers before you start each time at the beginning of the days flying. I use a Sonic Tronics auto glow system..........brilliant.

RE: UMS Evolution Radial Care and Operation
 

thanks tom. sounds good.

its my third radial. I have just never run in an engine at these temperatures and am quite reluctant to wait till spring for the first run.

cymaz, being austrian I will go patriotic and order a microsens Glow 7 :D

rev

RE: UMS Evolution Radial Care and Operation
 

can anybody tell me if the 999 radial engine is too big or to much for the 1/4 scale Flair Stearman? I see someone is using a Robart 780 radial engine that is 10 H.P. on you tube it looks like the right size with no problems and just wondering if the evo 999 would work? I have a chance to get one (Flair Stearman) 89 in. wing it claims to be 19-22 lbs although the owner said around 28 to 30 lbs. beautifully built but it has a G-62 gas engine, never been flown, I told the guy I don`t want the engine, the problem is you can not get the fuel tank out to replace it with a tank for the evo, the only exit is through the cock pit and it does not look big enough to put a tank through it? any suggestions? or comments would be appreciated thanks..........Steve

RE: UMS Evolution Radial Care and Operation
 

My 777 hauls round my 27lbs General Western Meteor without any problems

RE: UMS Evolution Radial Care and Operation
 

I have a sopwith pup of Toni clark in scale 1/3.
Is ok for this model the 9 cylinder made in India?
Are you happy with these engines?
Thanks, regards from Italy!
Ciao<br type="_moz" />

RE: UMS Evolution Radial Care and Operation
 

Say Tom, what size tank would you recommend for a UMS 990 in a Robinhood 99? I usually plan on an 8-10 minute flight, and using the Saito standard 1.0 oz of fuel per cubic inch of engine displacement for a minute of flight, I'm computing something like a 50-60 oz tank. That's at full throttle; I figure it's a good as a design number and the reserve comes from flying at less than full bore.
Will that big a tank fit in the Robinhood99?

Many thanks ...

RE: UMS Evolution Radial Care and Operation
 

I would use a 20 to 24 oz tank. I think mine is a 20. The saito at mid throttle gobbles fuel due to a not so good carb design. Pictures!!!! A perfect combo but put the batteries at the back of the fuselage! -Tom

RE: UMS Evolution Radial Care and Operation
 

well I just purchased this Flair Stearman 89in. wing the guy I got it from said with his G-62 engine it was at 30 lbs., now I plan on either putting in the Evo 999 or considering buying a 777 for it but not sure it will be enough engine? what say you? advice appreciated, very nice airplane just want it to look real..........Steve

RE: UMS Evolution Radial Care and Operation
 

So you are running the Saito 325 on your Robinhood 99? Reason for the question, I'm building the (original kit) Giant Telemaster as a mule for a number of engines, one of which will be the UMS Seidel 990. Was thinking a 40 oz tank should work for an OS FF-240, Saito 325, or UMS 770, but wasn't so sure about the 990. Perhaps I'm overdoing it?
Was also giving serious thought to using an OS carb on the 325, per your recommendation many moons ago. The Saito slobbers pretty bad in mid-range.

RE: UMS Evolution Radial Care and Operation
 

No, I have the saito with the OS carb on a 33% Yak 54 with a 16 oz tank. I have a Pegasus ff-240 and have a 14oz tank on it! Yep a 40 oz is pretty huge. -Tom

RE: UMS Evolution Radial Care and Operation
 

right... even with Kelvins good instructions, getting that Keleo on the 7-77 will give you at least three fits, 4-5 nervous breakdowns and some silent sobs in the corner of your workshop...

My work protocol...

1. loosen 49 screws
2. try fitting the exhaust
3. at some stage the cam rods fall out.
4. try fitting the exhaust
5. then the cam followers fall out
6. try fitting the exhaust
7. first exhaust manifold fits with a cunning turn and screw movement of cylinder head(s) and exhaust
8. replace cam rods and cam followers (stupid move at this stage)
9. while fastening the first screws and turning the cylinders to accept the other manifolds the intake manifolds, cam followers and cam rods fall out.
10. while putting back the intake manifolds the exhaust ring jumps back out.
11. go to 2.

and then, after many many tries...
12. fasten 49 screws

A very nice way to spend the evening :D

RE: UMS Evolution Radial Care and Operation
 

I have the UMS collector ring. And yes it was a fiddle to put on ( getting all 7 unions to fit snuggly and line up at the same time) but I found not one cam follower or push rod fell out.
It sat face down in one half of its polystyrene packaging
Was I doing something wrong ?????[X(]

RE: UMS Evolution Radial Care and Operation
 

Umm... I have the keleo ring. The UMS collector goes on the existing stubs, the keleo needs to be fitted to the cylinders themselves.

Well I followed Kelvins instructions and bolted it to the table. on turning the heads the cams all came out. I unbolted the engine to try to get the ring to fit a bit better and then the cam followers and intake stacks came out.

To be honest, I think many people will be more sophisticated in fitting this thing than I am. Just wanted to share the experiences of a ham fisted oaf :D

Rev

RE: UMS Evolution Radial Care and Operation
 

This is how I got around the fit problems with off-the-shelf exhaust rings!

http://www.rcuniverse.com/forum/m_10...m.htm#11211708

RE: UMS Evolution Radial Care and Operation
 

I am happy with my 999 and flies my 36lb. Corsair with authority.

RE: UMS Evolution Radial Care and Operation
 

Cymas,
what size prop are you swinging? I am considering a 777 for my 1/4 scale Flair Stearman, but it seems to be quite heavy the guy I got it from says 30lbs. with the G-62 on it I got the plane with out the engine but still seems heavy I was thinking about putting my 999 engine in it but would like to keep it in my Corsair, just not sure if the 777 would be enough power.

RE: UMS Evolution Radial Care and Operation
 

My ESM 85 in. Corsair weighs 31 lbs. The 777 flys it no problem. Even takes off on six cylinders which I dont recommend and will only do once.: Pete

RE: UMS Evolution Radial Care and Operation
 

mY 777 HAS A 22X10 Xoar prop. 10% nitro 5500rpm and 22lbs of static pull. Sonic Tronic on board glow.

RE: UMS Evolution Radial Care and Operation
 

Hi Pete, glad to see your posting on the Seagull AT-6 and the 35 cc radial. I had been considering the the same set-up but was apprehensive. I have the AT-6 but still debating the FG-30 or the 35 cc radial. A couple of questions:
1. With the 35 cc radial what does your AT-6 weigh?
2. Do you use on board glow (added weight)?
3. Any mods to the airframe itself to accomodate the radial other than removing the servo boxes forward of the firewall.
4. Does anyone sale the fuel pre-mixed to the nitro and oil percentages recommended by Evolution?

Thanks.

RE: UMS Evolution Radial Care and Operation
 

the fuel you can get is from Ritch`s brew recommended by Horizon they are in Houston Texas and their number is 713-661-5458 manufactured by Ritch`s Hobbies they make the fuel for the Evolution engines.

RE: UMS Evolution Radial Care and Operation
 

Hey folks,

started my 7-77 for the first time yesterday. Thanks to all the good tips in this thread it really started well. I primed it about ten turns, connected the glow to a big lead battery and after about five flicks it was alive.

I really like the sound with the keleo. Compared to the sound of other youtube vids with the straight pipes it sounds a bit more grown up.

Cant wait to run it outdoors and break it in properly.

nota bene: theres a run protocol that comes with the engine stating it has done 30 minutes of running at the factory. checking the clearance, the intake valves never really closed on factory setting and I do not think the engine would have run that way. Oh well... :eek:

I am starting with 0 Minutes on the clock ;)

[youtube]http://www.youtube.com/watch?v=z03hFQ9YKFQ[/youtube]

This is really the primary start. No hour long starting orgy before that.

Rev

RE: UMS Evolution Radial Care and Operation
 

I bet it got really smoky in there! Did sound nice! -Tom