RE: UMS Evolution Radial Care and Operation
 

Nubee, did you lubricate the valves and rockers while adjusting, the valves maybe sticking which could allow the push rods to fall out?
just a thought. The valve system on the UMS is totally exposed and requires external lubrication.

RE: UMS Evolution Radial Care and Operation
 

Hi Maxam,Hi nilsreinert123,thanks for your replies,the EVO35 Radial would struggle with a large bulky aeroplane like the Stinson 100 inch,but it sure would sound and look great !Looks like I will fit the Saito FG36or FA220, this will only require cutting a section from the bottom of that great looking 18 rocker cover cowl.The Saito200R3 will fit but swings a smaller prop at higher rpm and I don't own one of these engines.Cheers,Mark.

RE: UMS Evolution Radial Care and Operation
 

Hard to say. Tom has a ton of experience here in the last couple of years with all sizes of radials and thier performance in flight, so its hard to go against advise like that.

TBM says that 35cc class will fly it. A large scale prop on a radial (bigger than a 2 stroker) should work nicely.

Or get the original specs and see what the Power/Weight ratio is supposed to be.

But like most here. I am still in the building stage with no real world experience.

Think I would discuss it at great length with Tom......but thats just me;)

RE: UMS Evolution Radial Care and Operation
 

Thank you for your confidence in me Dadroman. I did PM Mark. Folks permit me to invade the glow radials with my evo gas 160 radial. You can find it on youtube; Evolution 160cc 7 cylinder Gas Radial in RC OMP Yak. -Tom

RE: UMS Evolution Radial Care and Operation
 

Hey Tom,

I could not locate your video on youtube (Evolution 160cc 7 cylinder Gas Radial in RC OMP Yak) - please post a link - I would love to see it.

Thanks,

Roger

RE: UMS Evolution Radial Care and Operation
 

Roger, I have no idea how to do this. Sorry. -Tom

RE: UMS Evolution Radial Care and Operation
 

Roger I did a search on youtube and found it right away! Try;evolution 160cc 7 cylinder gas radial. Make sure you use 7 not seven. -Tom

RE: UMS Evolution Radial Care and Operation
 

OK, I found the video,

Thank for sharing Tom,

Roger

RE: UMS Evolution Radial Care and Operation
 

Hi All
This is my first time here,quick introduction ,been modelling a long time,I started with single channel,valves(tubes) and escapements! Enough of that it makes me feel old!! I've just ordered a evo777, my first radial, its out of stock and will be a couple of weeks , I'll just have to be patient.
I intend putting it in my Jungmeister which flies great with a Fuji 50.Its 75" span weighs 18 lbs.What can I expect perfomance wise compared to the Fuji bearing in mind the 777 is a good deal heavier?
I have found a couple of full size Jungmeisters which are flying without a cowl so I'll do the same which will help with CG(the cowl is quite heavy))
.And anyway why spend what to me is a small fortune on a lovely looking engine and then hide it inside a cowl?.
All the best Tim
http://flickrhivemind.net/Tags/fpbri,hirth/Interesting

RE: UMS Evolution Radial Care and Operation
 

Tim, 18 pounds, use a 24x10 prop and expect solid spirited performance even at 1/2 throttle it will fly well. -Tom

RE: UMS Evolution Radial Care and Operation
 

Hi Tom
That was quick, your words of encouragement have made me more impatient.! Here's a video of my Jungmeister with the Fuji
http://www.youtube.com/watch?v=xXnXYSo0s6U (sorry about the music) Once it is sorted with the 777 I intend to re cover it as per the full size during this winter. http://flickrhivemind.net/Tags/fpbri,hirth/Interesting
Cheers Tim

RE: UMS Evolution Radial Care and Operation
 

Tim Advantagehobby.com has them!

RE: UMS Evolution Radial Care and Operation
 

Tom
It's already paid for,It's very expensive buying from the US, UK customs and postal "administration fees" will add at least 30%.I've had many orders from Hobbyking and never been caught (touch wood),but from the US they get me every time.No I'll just have to wait.
Cheers Tim

RE: UMS Evolution Radial Care and Operation
 

Ok guys, I have been having problems with my on board glo system, turns out they were bad soldering joints on the wiring, now problem fixed, have new connectors and better soldering joints, nuff said on that, and now am puzzled as to why when I have full throttle with glo turned off 5,600 to 5,700 RPM, (again 24x12x2 blade) but when turning on the glo the RPM`s drop to 5,400 and then turn the glo back off at full throttle, Rpm`s go back up?? not sure why but the opposite is true when at idle 1,700 or so with glo off but when turning the glo back on Rpm`s go up to 2,000 or so can`t figure that one out? and problem #2 overheating, when the maiden flight happened temp was around 68 to 70 degrees ran great, now with the heat wave we have been getting around 90+ degrees Rpm`s dropping engine running hot. guys at the local field are saying not enough air exiting out the cowl so I open up the cowl flaps, still not enough opening which is about 1/2 ins. or less opening around the whole cowl, still running hot, so I opened up the bottom of the cowl 4 ins. wide and 2 1/2 to 3 inches long, have not had the chance to try it yet!, but I know they say heat does not bother it too much but not sure if it is the air flow through the cowling or ???, hope to get some time on it this weekend, will let you how it goes thanks-Steve

RE: UMS Evolution Radial Care and Operation
 

Steve, Having the glow on at full throttle you are advancing the "spark" timing and that will reduce power and overheat the engine. In otherwords the fuel is igniting too early. Can you richen the engine to make it slow down then lean to speed back up? If not it is not getting enough fuel and is running lean. -Tom

RE: UMS Evolution Radial Care and Operation
 

Tom that is the best explanation I have heard yet! thanks for the info, makes sense to me now why it would slow down, I have the glo on a switch so I can turn on at will, the way I do it is turn on the glo at start up, get up to temp. then turn off and taxi out, and on take off turn back on til air born and then back off again through the flight, then when on final back on again til touch down then off while taxing back, just to conserve battery this is my normal procedure, as my battery is only a "D" size 10,000 mah. battery and only lights the plugs for 20 minutes or less if left on all the time. I am reluctant to only use external battery for fear of not being able to relight the plugs when loosing a cyl. which has happened before, Electro dynamics EDR glo light is what I am using and the company is upgrading to a better system with a 3 volt battery and program for lighting the plugs with more current and having the capacity for a much longer lasting glo, so maybe the upgrade for me next year, anyway, hope to get in some great flying we have an event this weekend, later-Steve

RE: UMS Evolution Radial Care and Operation
 

Are all of you guys mixing your own fuel? Or is there a commercially made fuel for the Evolution radials available now?

Pete Bergstrom, is Horizon going to market some?

RE: UMS Evolution Radial Care and Operation
 

the fuel that Horizon recommends for the radials is Ritch`s Brew for the glo version, that`s what I have been using, 5%nitro and 7% oil, seems to run my 999 evo pretty well. -Steve

Well, got in some flights on the Corsair at a airshow here in Michigan temps around 85 deg. and no over heating problems since I opened up the cowling on the bottom and the cowl flaps are opened, running about 5,600 to 5,700
RPMS, things went real well, finally got all the bugs out and weather was fabulous, one guy commented how that the engine was the best dummy radial scale engine he has ever seen, :D he was amazed to here it run-Steve

RE: UMS Evolution Radial Care and Operation
 

Yep I use riches brew too! I use 16% oil 15% nitro diluted one to one with methanol. Dummy radial Ha!!! -Tom

RE: UMS Evolution Radial Care and Operation
 

Thanks guys!

RE: UMS Evolution Radial Care and Operation
 

<span id="result_box" lang="en"><span class="hps">Hi</span>
<span class="hps">I want to hear</span> <span class="hps">of</span> <span class="hps">you who have a</span> <span class="hps">UMS</span> <span class="hps">7-35</span><span>.</span>
<span class="hps">Are you satisfied with</span> <span class="hps">how it reacts</span> <span class="hps">to idle</span> <span class="hps">to full throttle</span><span>?</span>
<span class="hps">I find it hard</span> <span class="hps">to get it</span> <span class="hps">to go well</span> <span class="hps">over the whole range</span><span>.</span>
<span class="hps">The engine</span> <span class="hps">is</span> <span class="hps">from 2010,</span> <span class="hps">one of the first</span> <span class="hps atn">(</span><span>NR10</span><span>).</span>
<span class="hps">It has never</span> <span class="hps">been a</span> <span class="hps">problem</span> <span class="hps">in the air</span><span>.</span>
<span class="hps">Do you have</span> <span class="hps">nitro</span> <span class="hps">or pressure feed</span> <span class="hps">to the fuel tank
Lars<br type="_moz"/></span></span>

RE: UMS Evolution Radial Care and Operation
 

How did you guys obtain your Ritch's Brew fuel? I have sent two e-mails to two different addresses listed on the Ritch's Brew website. One got returned as undeliverable, the other has never been answered.

RE: UMS Evolution Radial Care and Operation
 

on the fuel bottle their number is 713-661-5458 they are out of Houston Texas.- Steve

RE: UMS Evolution Radial Care and Operation
 

Tom, its widely available in the Houston area but I tell ya......about 2 years ago I spent a DAY looking for thier factory and never found it. They even have a LHS and those folks didnt know squat. I have also tried to contact them with no luck.

Mikes in North Dallas always has a WIDE selection of Ritch's.....I know that doesnt help you much but....;)

RE: UMS Evolution Radial Care and Operation
 

I tried to start my UMS Evolution 7-77 radial engine for the first time today without any luck. I tried everything I could think of but never even got a pop out of the engine. I lubed the valve train before I started and set up the Micorsens on board glow system. I mixed my own fuel of 90% methanol and 10% Klotz oil. I worked on the thing for over two hours and almost burned down my starter. I checked and rechecked everything including pulling every glow plug and verifying that each one lit up. I choked the engine to a point that raw fuel was comming out of the exhaust but not even a single pop.

I'll give her a rest for a day or two and then try again. Hey Tom, do you remember where your carb needle is set?

Thanks,

Roger

RE: UMS Evolution Radial Care and Operation
 

Thanks Shane.

Horizon is going to have to come up with a fuel solution for these engines they are marketing. Consumers having to track down an obscure fuel maker is not the way to go.

Maybe get with a major fuel manufacturer and give them an incentive for making "Evo Radial Fuel". :)

RE: UMS Evolution Radial Care and Operation
 

Roger, I had a hard time starting my 7-77 the first time too. I've never used a starter on mine, just hand propped it, with no luck until I figured out how much to prime it. I must have thrown it over for nearly an hour before i gave it a rest. Now I just prime about 6 to 8 blades (on first run) and it usually starts right up first flip after. My needle setting is sitting around 2 turns out on the test stand.

Shawn

RE: UMS Evolution Radial Care and Operation
 

I know what you mean. I havent run my (Chase's) 7-70 yet but I have located pure Methanol in 5 gallon cans at the local industrial supply. I figure that makes it easy to cut about any fuel to get it in the range we need.

It is strange how a major dist/retailer would be recommending a rather obscure and localized fuel company.

Let us know if you get ahold of them.......and where they are at:D

RE: UMS Evolution Radial Care and Operation
 

Has anyone tried contacting RED MAX FUELS / FHS SUPPLY?
http://www.fhsoils.com/model_prices.html

Back when I ran Technopower and Seidel radials, Red Max would make me any blend I wanted at a reasonable price, or simply sell me gallons of methanol with which I could dilute off the shelf standard glow fuels.

RE: UMS Evolution Radial Care and Operation
 

I am kind of surprised you have not been able to contact them, I called them 2 weeks before the Toledo show and they answered right away and I ordered a case for my Evo 999 and they brought it to the show and they saved me the shipping, plus had a show special on the price, and said to call them to order more when I need it, so not sure whats going on but I have three gal. left and hope to order more soon.

RE: UMS Evolution Radial Care and Operation
 

Roger, I am lost for words for your difficulty starting the 7-77. My experience is it is the easiest of the three to start. OK open the High speed needle three turns, Then with your finger over the carb flip the prop about 5 times at high throttle. Now go to lower throttle so the choke is 1/5 to 1/4 th open. All assuming you are starting with a dry engine. It should start right away by hand. Now if the low speed needle is in too far the engine will not draw any fuel and then of course it will not start. -Tom

RE: UMS Evolution Radial Care and Operation
 

Steve, I have not tried to telephone him, only to e-mail.

In any case I have decided to just blend my own fuel.

RE: UMS Evolution Radial Care and Operation
 

Hi.

So what needle settings is everyone using? High needle settings are mentioned in a few posts, but no mention of the idle setting. How many turns out from fully closed?

I ask, because I had an issue with my glow system, and in trying to fix, all settings have been lost. I have it running again after replacing the glow system, but my 7-70 will not idle reliably below 2000 rpm.

Landings do not happen when the Seidel is ticking over at those speeds. My Gee Bee just zooms on past at head height, never looks like slowing down enough to land.

Greg

RE: UMS Evolution Radial Care and Operation
 

The 7-77 manuel says 2 turns out for low speed adj. .....to start.( thats the tiny screw opposite the high speed needle not the throttle stop screw)
2 1/2 for high. hope that helps.

RE: UMS Evolution Radial Care and Operation
 

On my 735 the manual also said 2 turns for the low needle ,but thats wrong ,i think i have atleast 4 turns on it :)

RE: UMS Evolution Radial Care and Operation
 

Hello,

I am interested in the 7-77 glow engine. If we are talking about 20 pounds and 80" ws with a good high pitch prop then what would you say about the 77' potential?
The airframe is very aerodynamic.

RE: UMS Evolution Radial Care and Operation
 

I'd say it would have a good chance of going into ORBIT...!!!! What plane is it?

FWIW the CMPro 83" 20-22lb Zero flies really well with a Saito 325 or ASP-Magnum 400 and 20 x 10 prop. The 7-77 needs a 22 x 12 - 24 x 10 and is bigger and heavier ....

Regards RossG
radial1951
_____________
<br type="_moz" />

RE: UMS Evolution Radial Care and Operation
 

The 7-77 is only 4 ounces heavier than the saito 325. The saito is 53cc and the other well obviously 77cc. -Tom My 9-90 had a milestone...flight 100 this week and looks to last another 500!

RE: UMS Evolution Radial Care and Operation
 

Tom that sounds encouraging on your 100th flight, I have number 14 so far on my 9-99 and running great hope to get at least as much with mine, thanks, also did as you did on draining the oil from the engine after end of day cool down and flushing out the moisture with the after run. -Steve

RE: UMS Evolution Radial Care and Operation
 

I had a little better luck starting my UMS Evolution 7-77 radial engine today. I followed Tom's suggestion of five blades of choke with the needle valve open two turns. The engine grumbled on the first flip. I continued hand flipping for the next five minutes but no luck. I then put the electric starter to work and she easily roared to life. I notice that there is a huge differance when the glow system is engaged. The engine tends to loose a cylinder at low speed and the microsens system is a bit slow to reset. I ran the first 1/2 gallon of fuel through the engine on several runs. The engine is getting stronger but will need a lot more break in running and low speed jet adjustment. I could not get any after run oil at the local hobby shop so I had to settle for air tool oil to flush the engine after the break in runs.

Roger