UMS Evolution Radial Care and Operation
05-03-2017 | 07:05 AM
#2201
Hello modellers.
As you know i'm from the Netherlands but my english is not perfect. So I have a little question. What is the difference between tick-over and idle?
Greetings,
Timo
As you know i'm from the Netherlands but my english is not perfect. So I have a little question. What is the difference between tick-over and idle?
Greetings,
Timo
05-06-2017 | 07:01 AM
#2204
Hello all.
A friend of me has the Evo 7 -160 radial gasser and is busy with the break in procedure. He has some problems.First: Cilinder 1 leaks oil when the engine is running. and second there comes out dirty grey grease of one of the nipples from the crankcase where the pushrods come out.
Are these two things normal?
I like to hear.
Greetings Timo.
A friend of me has the Evo 7 -160 radial gasser and is busy with the break in procedure. He has some problems.First: Cilinder 1 leaks oil when the engine is running. and second there comes out dirty grey grease of one of the nipples from the crankcase where the pushrods come out.
Are these two things normal?
I like to hear.
Greetings Timo.
05-07-2017 | 12:50 AM
#2205
Hello all.
A friend of me has the Evo 7 -160 radial gasser and is busy with the break in procedure. He has some problems.First: Cilinder 1 leaks oil when the engine is running. and second there comes out dirty grey grease of one of the nipples from the crankcase where the pushrods come out.
Are these two things normal?
I like to hear.
Greetings Timo
A friend of me has the Evo 7 -160 radial gasser and is busy with the break in procedure. He has some problems.First: Cilinder 1 leaks oil when the engine is running. and second there comes out dirty grey grease of one of the nipples from the crankcase where the pushrods come out.
Are these two things normal?
I like to hear.
Greetings Timo
05-08-2017 | 12:41 AM
#2206
Yes I agree. These engines normally runs great but the black oil is comming from between the cilinder and cilinder head. He has already tightend the screws, of course with care but without succes.And what is the grey mass comming out of one of the nipples?
Timo
Timo
05-08-2017 | 08:30 AM
#2207
Today I have broke in my Evo 7-77. WHAT AN ENGINE. It runs great, very smooth and the noise is like a real radial. I am very sattisfied. I run the engine with a glow driver from Just Engines in the UK. and it also works great and is very easy to install. Yes I'm a proud owner of an Evo 7-77.
Regards Timo
Regards Timo
05-08-2017 | 12:28 PM
#2208
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From: San Diego,
CA
I just mounted this to my H9 Corsair. What is the purpose of the spring clip on the end of the prop shaft? I won't be able to use it since I'm putting a spinner adapter nut on the end of the shaft, but I have never seen one of those on a engine before.
05-09-2017 | 01:46 AM
#2209
If the propnut comes loose there is a chance that you will lose this nut by rotating of the prop. The spring clip prevents this.
Timo
05-22-2017 | 06:16 AM
#2210
Thread Starter
My Feedback: (62)
Many of you might be interested that UMS is sending me a newly redesigned 260 gas radial. Yes this is a glow thread but the gas thread has been inactive for over a year. If promising I will initiate a new thread for the redesigned radials. Like before it is a 7 cylinder engine. -Tom
05-24-2017 | 05:32 AM
#2213
Works great! In stock form it may be slightly "soft" and require you to fly it more on the wing. If you convert it to CDI ignition, it picks up a good amount of power and then it's more than enough. Still won't match the FG84 or FG90 combo for all out power and power-to-weight ratio however, but IMO there's less fiddling to get the 777 to work and balance properly if you are able to make or source your own 1" mounting block that is.
06-15-2017 | 02:39 PM
#2216
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From: springhill,
FL
I've read post by maxim and I purchased ziroil stearman 77" span based on them. 20lb is very good for warbird...my plane is 20lb or so and being a biplane I'm sure it will be fine.
I have 7-77 in my stearman....will fly it very soon.
I have 7-77 in my stearman....will fly it very soon.
06-16-2017 | 08:08 AM
#2219
My Feedback: (2)
The flair stearman was framed up by a friend who passed away. I helped him during the process.
I haven't finished the air frame yet to cover it. I've been working on other projects.
But I shall get on it perhaps later this summer..
I think the 7-70 will look pretty good sitting out there in the breeze and should be sufficient power for the plane.
The full scale Plane only had a Continental 170 HP engine as a Trainer when first introduced. So they weren't over powered either. You learned to fly on the wing.
I haven't finished the air frame yet to cover it. I've been working on other projects.
But I shall get on it perhaps later this summer..
I think the 7-70 will look pretty good sitting out there in the breeze and should be sufficient power for the plane.
The full scale Plane only had a Continental 170 HP engine as a Trainer when first introduced. So they weren't over powered either. You learned to fly on the wing.
06-19-2017 | 10:20 PM
#2223
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From: Coimbatore , India
looks like I need some parts for this engine. HH doesn't sell them and UMS/india seems a long ways/time away...anyone in USA sell the parts? im in certain need of rings and maybe orings (intake/exhaust tubes). it'd be nice to know a source for the cam rings and cylinders, too. i'd also like to get a tool to remove the heads at some time (to replace cylinder without replacing head).
.
how's correspondence with UMS going lately? I noticed their website is "under construction"
.
how's correspondence with UMS going lately? I noticed their website is "under construction"
06-19-2017 | 10:27 PM
#2224
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From: Coimbatore , India
evo 7-77
wait until you have to replace rings in one of these! horizon doesn't sell the parts. india sells the ring as part of a "cylinder assembly" (piston, ring, cylinder, stuff that attaches cylinder to case) for much more than the price of a ring would cost, but the tool to remove the head from the cylinder will cost you $750 (india) as quoted me from ums. ums DID say that they'd consider a special case for rings only, but I haven't got back with them on that yet (took 3 times- waiting couple days 2 times, to get an answer from horizon hobby). so heare's the dilemma: see if and how much$ rings from india will be; get cylinder assy from india just in case its necessary - BUT I don't have the tool to install it on the head! ... I don't think HH will do just that part, and its ridiculous to think of getting charged for that.
.
I have heard of the rings, and maybe a cylinder, being replaced by owners a couple times previously on these engines. can any of you that have done it tell me how (tool?) and where you got the rings/cylinder from?
.
thx, andy
wait until you have to replace rings in one of these! horizon doesn't sell the parts. india sells the ring as part of a "cylinder assembly" (piston, ring, cylinder, stuff that attaches cylinder to case) for much more than the price of a ring would cost, but the tool to remove the head from the cylinder will cost you $750 (india) as quoted me from ums. ums DID say that they'd consider a special case for rings only, but I haven't got back with them on that yet (took 3 times- waiting couple days 2 times, to get an answer from horizon hobby). so heare's the dilemma: see if and how much$ rings from india will be; get cylinder assy from india just in case its necessary - BUT I don't have the tool to install it on the head! ... I don't think HH will do just that part, and its ridiculous to think of getting charged for that.
.
I have heard of the rings, and maybe a cylinder, being replaced by owners a couple times previously on these engines. can any of you that have done it tell me how (tool?) and where you got the rings/cylinder from?
.
thx, andy
Ramaraj N
06-22-2017 | 01:51 PM
#2225
My Feedback: (2)
Question,
I was trying to start my EV160 in the plane this week and noticed when I pressed the primer bulb on the carburator.. gas flowed from that area down to the ground. Is this due to the over flow brass fitting near it or what?
I did buy a replacement primer bulb but it still leaks a bit in that area.
I was trying to start my EV160 in the plane this week and noticed when I pressed the primer bulb on the carburator.. gas flowed from that area down to the ground. Is this due to the over flow brass fitting near it or what?
I did buy a replacement primer bulb but it still leaks a bit in that area.
