UMS Evolution Radial Care and Operation
07-08-2013, 08:15 AM
#826
RE: UMS Evolution Radial Care and Operation
I used 8% oil, 7.5%nitro, balance methanol or wildcat one to one with methanol. Tank location on throttle centerline. During break in, on higher oil the needle valve could not quite deliver enough fuel. -Tom
07-08-2013, 05:45 PM
#827
Junior Member
Join Date: Jul 2013
Location: , SWEDEN
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
RE: UMS Evolution Radial Care and Operation
Hi guys, I'm planning to put a evo 735 with collector ring in my GP Super Stearman. (without the cowl)
I've read in the manual you should relieve the firewall 10-15mm, but looking through these pictures some of you seem to have bolted the engine mount straight to the firewall /bench back plate. Examples:
Is it okay to bolt it into the firewall like this or not? It would make things easier and look better..
Thanks in advance,
Dave
I've read in the manual you should relieve the firewall 10-15mm, but looking through these pictures some of you seem to have bolted the engine mount straight to the firewall /bench back plate. Examples:
Is it okay to bolt it into the firewall like this or not? It would make things easier and look better..
Thanks in advance,
Dave
07-08-2013, 09:17 PM
#828
My Feedback: (3)
Join Date: Aug 2003
Location: near Innsbruck, AUSTRIA
Posts: 615
Likes: 0
Received 13 Likes
on
10 Posts
RE: UMS Evolution Radial Care and Operation
Hi,
the top Stearman is mine. I just made a hole into the Firewall right behind the carb so theres a lot more than the 15mm. I Think they are worried about airflow.
Rev
the top Stearman is mine. I just made a hole into the Firewall right behind the carb so theres a lot more than the 15mm. I Think they are worried about airflow.
Rev
07-11-2013, 05:51 AM
#829
My Feedback: (4)
RE: UMS Evolution Radial Care and Operation
ORIGINAL: Pull Up Now!
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
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
07-11-2013, 06:03 AM
#833
RE: UMS Evolution Radial Care and Operation
My 7-77.....Xoar 22x10. 8%nitro, 9%oil (its model technics propower16 diluted down with 50/50 methanol ). 6300 rpm WOT and 25/26 lbs static pull.
07-11-2013, 06:10 AM
#834
My Feedback: (4)
RE: UMS Evolution Radial Care and Operation
ORIGINAL: Maxam
Three blade 22x10 xoar or 22x12 two blade. -Tom
Three blade 22x10 xoar or 22x12 two blade. -Tom
07-11-2013, 06:24 AM
#835
RE: UMS Evolution Radial Care and Operation
If you are referring to your 777, the 3 blade XOAR 22x10 ground rpm is 4400. Sure winds out in the air though on my corsair. For your 999 24x14 or 26x12 depending on the airframe selected. -Tom 9 hours to get the collector ring on....eeeeeek!
07-11-2013, 06:46 AM
#836
My Feedback: (4)
RE: UMS Evolution Radial Care and Operation
ORIGINAL: Maxam
If you are referring to your 777, the 3 blade XOAR 22x10 ground rpm is 4400. Sure winds out in the air though on my corsair. For your 999 24x14 or 26x12 depending on the airframe selected. -Tom 9 hours to get the collector ring on....eeeeeek!
If you are referring to your 777, the 3 blade XOAR 22x10 ground rpm is 4400. Sure winds out in the air though on my corsair. For your 999 24x14 or 26x12 depending on the airframe selected. -Tom 9 hours to get the collector ring on....eeeeeek!
I was not using it last time
07-11-2013, 08:06 AM
#838
My Feedback: (64)
Join Date: Dec 2007
Location: Crown Point, IN
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
RE: UMS Evolution Radial Care and Operation
I really don't know the answer to this one and would like anyones/everyones help. I have a Fully "decked" out Byron Waco that I would like to install an ASP Radial(5 Cyl) only I don't know wether the ASP has the power to make this combination work. The plane weighs approx 28lbs. and the ASP is virtually brand new with a total glow plug system and exhaust ring on it also. Would any one care to venture a guess? Enough power? 18x10 2 blade prop? 5 to 15 percent fuel, 8 to 10 percent oil?
Thanks, Dan
Thanks, Dan
07-11-2013, 08:33 AM
#839
RE: UMS Evolution Radial Care and Operation
Capt.
I had this same engine years ago with every intention of flying my 24 pound Mr. Mulligan. However, after extensive bench running, I did not feel it would provide adequate power. Admittedly, the MM is a "racing" plane and probably looks best going flat out, full throttle.
Your Waco is a different style of aircraft... but is also heavier and 'draggier'
My opinion (for what it's worth) is that the ASP will 'fly' the Waco, but do little else, and you will have no reserve.
Radials can drop a cylinder, so imagine your Waco with this engine, but >20% power reduction??
To be on the safe side and to avoid a disappointing flight experience, I would recommend against the ASP for your Waco.
The Evo 7-77 would be a much better choice.
I had this same engine years ago with every intention of flying my 24 pound Mr. Mulligan. However, after extensive bench running, I did not feel it would provide adequate power. Admittedly, the MM is a "racing" plane and probably looks best going flat out, full throttle.
Your Waco is a different style of aircraft... but is also heavier and 'draggier'
My opinion (for what it's worth) is that the ASP will 'fly' the Waco, but do little else, and you will have no reserve.
Radials can drop a cylinder, so imagine your Waco with this engine, but >20% power reduction??
To be on the safe side and to avoid a disappointing flight experience, I would recommend against the ASP for your Waco.
The Evo 7-77 would be a much better choice.
07-11-2013, 07:24 PM
#840
RE: UMS Evolution Radial Care and Operation
I agree with the Richard. Dropping a cylinder at 28 lbs. would be challenging. My Fleet is approximately 24 lbs. with the ASP radial and if I lose a cylinder it gets a bit dicey on takeoff when all five are needed. At altitude with a cylinder drop, no problem. I usually fly at half throttle or less.
Bob
Bob
07-14-2013, 05:13 AM
#841
Senior Member
Join Date: Aug 2009
Location: NSW, AUSTRALIA
Posts: 204
Likes: 0
Received 0 Likes
on
0 Posts
RE: UMS Evolution Radial Care and Operation
ORIGINAL: CAPT. DAN
..... The plane weighs approx 28lbs. and the ASP is virtually brand new with a total glow plug system and exhaust ring on it also. Would any one care to venture a guess? Enough power? 18x10 2 blade prop? 5 to 15 percent fuel, 8 to 10 percent oil? ?????
Thanks, Dan
..... The plane weighs approx 28lbs. and the ASP is virtually brand new with a total glow plug system and exhaust ring on it also. Would any one care to venture a guess? Enough power? 18x10 2 blade prop? 5 to 15 percent fuel, 8 to 10 percent oil? ?????
Thanks, Dan
Take care not tocompare the6% oilrequirements of the Evo-Seidel-UMS type radials with the18% oilneeds of the OS-Saito-ASP type radial engines.
The Evo type engines use the crankcase as the first stage of the fuel inlet system. All internal components, including the cam drive section, are bathed with the Fuel-Oil mix before the mixture is drawn off by the separate intake manifolds to each cylinder. This continuous supply of cool fuel mix also considerably reduces the heat in the crankcase, especially cooling the underside of the pistons.
The OS-Saito-ASP type engines have a Fuel Inlet Chamber which is SEPARATE and SEALED from the crankcase. They rely only on oil blowby past the piston ring to lubricate the bottom end, and the high percentage of oil, which is not burnt, helps take some of the heat away out the exhaust (but they run hotter than the Seidel design). These engines are unlikely to have a long life on HALF the recommended oil content.... At least the OS/ASP has a needle roller bearing on the crankpin... Of course, you can buy a special rear case for your ASP which allows the fuel mix into the crankcase in a manner similar to the Seidel type engines.
Regards, RossG
radial1951
_____________
07-14-2013, 07:11 AM
#842
RE: UMS Evolution Radial Care and Operation
ORIGINAL: radial1951
Hi Dan,
Take care not to compare the 6% oil requirements of the Evo-Seidel-UMS type radials with the 18% oil needs of the OS-Saito-ASP type radial engines.
The Evo type engines use the crankcase as the first stage of the fuel inlet system. All internal components, including the cam drive section, are bathed with the Fuel-Oil mix before the mixture is drawn off by the separate intake manifolds to each cylinder. This continuous supply of cool fuel mix also considerably reduces the heat in the crankcase, especially cooling the underside of the pistons.
The OS-Saito-ASP type engines have a Fuel Inlet Chamber which is SEPARATE and SEALED from the crankcase. They rely only on oil blowby past the piston ring to lubricate the bottom end, and the high percentage of oil, which is not burnt, helps take some of the heat away out the exhaust (but they run hotter than the Seidel design). These engines are unlikely to have a long life on HALF the recommended oil content.... At least the OS/ASP has a needle roller bearing on the crankpin... Of course, you can buy a special rear case for your ASP which allows the fuel mix into the crankcase in a manner similar to the Seidel type engines.
Regards, RossG
radial1951
_____________
ORIGINAL: CAPT. DAN
..... The plane weighs approx 28lbs. and the ASP is virtually brand new with a total glow plug system and exhaust ring on it also. Would any one care to venture a guess? Enough power? 18x10 2 blade prop? 5 to 15 percent fuel, 8 to 10 percent oil? ?????
Thanks, Dan
..... The plane weighs approx 28lbs. and the ASP is virtually brand new with a total glow plug system and exhaust ring on it also. Would any one care to venture a guess? Enough power? 18x10 2 blade prop? 5 to 15 percent fuel, 8 to 10 percent oil? ?????
Thanks, Dan
Take care not to compare the 6% oil requirements of the Evo-Seidel-UMS type radials with the 18% oil needs of the OS-Saito-ASP type radial engines.
The Evo type engines use the crankcase as the first stage of the fuel inlet system. All internal components, including the cam drive section, are bathed with the Fuel-Oil mix before the mixture is drawn off by the separate intake manifolds to each cylinder. This continuous supply of cool fuel mix also considerably reduces the heat in the crankcase, especially cooling the underside of the pistons.
The OS-Saito-ASP type engines have a Fuel Inlet Chamber which is SEPARATE and SEALED from the crankcase. They rely only on oil blowby past the piston ring to lubricate the bottom end, and the high percentage of oil, which is not burnt, helps take some of the heat away out the exhaust (but they run hotter than the Seidel design). These engines are unlikely to have a long life on HALF the recommended oil content.... At least the OS/ASP has a needle roller bearing on the crankpin... Of course, you can buy a special rear case for your ASP which allows the fuel mix into the crankcase in a manner similar to the Seidel type engines.
Regards, RossG
radial1951
_____________
I recently saw a response from long-time model engine guru, Clarence Lee, to a similar question about the low oil content of Evolution radials; he told the modeler he would not even consider running ANY glow engine on less than 18% oil. However, Mr. Lee also added that he was not familiar with the Evolution radials.
My buddy has been flying his Seidel 7-70 on 6% oil for years and has never had a single issue. Obviously, UMS/Seidel (and even Technopower) are of a different design than the O.S. radial. It is a GOOD THING too, as 18% oil makes one heck of a mess!
07-14-2013, 03:31 PM
#844
RE: UMS Evolution Radial Care and Operation
ORIGINAL: slskn
Just wondering if you used silver solder to put together that ring I just purchased the materials and going to make one like you did, thanks much for the info
ORIGINAL: Pull Up Now!
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
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
Rick
07-17-2013, 06:33 AM
#845
My Feedback: (128)
Join Date: Dec 2003
Location: Naperville,
IL
Posts: 395
Likes: 0
Received 0 Likes
on
0 Posts
RE: UMS Evolution Radial Care and Operation
ORIGINAL: Sundownee
Tom,
What fuel did you use and what is the brand of plugs come with engine now. I picked up the new updated carb from evolution, which I believe should've been free to correct the throttle problem.
Thanks
Tom,
What fuel did you use and what is the brand of plugs come with engine now. I picked up the new updated carb from evolution, which I believe should've been free to correct the throttle problem.
Thanks
Thanks,
RB8
07-17-2013, 08:22 AM
#846
My Feedback: (30)
RE: UMS Evolution Radial Care and Operation
RB8,
I picked up engine from UMS, just as they were switching from Seidel. This was in early 2011, later in 2012 horizon had the new carb instock. You can tell by looking at the fuel needle bore on the old one is oval, the new one is different. I have it installed on mine, can't remember exactly what it looked like but I believe it was a straight slot.
Does work much better in all ranges especially high.
Paul
I picked up engine from UMS, just as they were switching from Seidel. This was in early 2011, later in 2012 horizon had the new carb instock. You can tell by looking at the fuel needle bore on the old one is oval, the new one is different. I have it installed on mine, can't remember exactly what it looked like but I believe it was a straight slot.
Does work much better in all ranges especially high.
Paul
07-17-2013, 08:56 AM
#847
Senior Member
RE: UMS Evolution Radial Care and Operation
Here is a picture of a carburetor from UMS Seidel 7-35.
I'm waiting for a new carburetor and some more parts
Lars
I'm waiting for a new carburetor and some more parts
Lars
07-17-2013, 03:17 PM
#848
My Feedback: (128)
Join Date: Dec 2003
Location: Naperville,
IL
Posts: 395
Likes: 0
Received 0 Likes
on
0 Posts
RE: UMS Evolution Radial Care and Operation
Thanks for the prompt responses, guys.
After some finagling around the riveted linkages they put on the 735, I managed to take a couple of shots of the spray bar. Looks rectangular, not oval, so my guess is this is the later model.
Now to contemplate what plane to put it in - maybe the 72" SIG SRE Waco? Hate to cover it up with a cowl, though.
After some finagling around the riveted linkages they put on the 735, I managed to take a couple of shots of the spray bar. Looks rectangular, not oval, so my guess is this is the later model.
Now to contemplate what plane to put it in - maybe the 72" SIG SRE Waco? Hate to cover it up with a cowl, though.
07-23-2013, 06:08 AM
#849
My Feedback: (4)
RE: UMS Evolution Radial Care and Operation
Hello rick just wondering if a common propane torch would be hot enough to melt the silver rod you were talking about for the exhaust ring? and just wondering if your exhaust ring is held up so far have you been running your 777 ? and did you get the corsair or another plane for your engine?
07-31-2013, 06:58 AM
#850
My Feedback: (4)
RE: UMS Evolution Radial Care and Operation
Having a hard time finding the right prop for my 999 evo, I am waiting for a 26x10 2blade to be shipped. Not very many selections of props available, anyone having any luck? I tried 24x12 2blade xoar RPMS @ 5600 to 5700 on the ground , 22x10 3 blade just tried it last night @ 6100 to 6200 way too many RPMS , will post my results when I try the 26x10 xoar 2blade.