UMS Evolution Radial Care and Operation
09-26-2012, 04:10 PM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: Maxam
It has banana plugs
It has banana plugs
09-26-2012, 05:13 PM
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RE: UMS Evolution Radial Care and Operation
There are seven wires, one for each plug, that all terminate in a big ole banana plug. The business end of each wire has a spring clip that attaches well enough to an OS plug. You can change out the banana plug for whatever works with the rest of your equipment - Deans ultra plugs, for example.
09-28-2012, 07:01 AM
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RE: UMS Evolution Radial Care and Operation
I've found a very informative multi part article which gives a lot of understanding on air cooled engines/radials. Thought I would share:
http://www.enginehistory.org/air-coo...inders_1.shtml
http://www.enginehistory.org/air-coo...inders_1.shtml
09-28-2012, 10:34 AM
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RE: UMS Evolution Radial Care and Operation
Is the great planes military Stearman too small for the 7-35? Thanks!
http://www.youtube.com/watch?v=sJ49kyulIec
http://www.youtube.com/watch?v=sJ49kyulIec
09-28-2012, 02:30 PM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: Maxam
Nice combo and has been posted here two or three times-Tom
Nice combo and has been posted here two or three times-Tom
http://www.texasrcplanes.com/farcai26onor.html
09-28-2012, 06:08 PM
#609
RE: UMS Evolution Radial Care and Operation
ORIGINAL: skypup50
Is the great planes military Stearman too small for the 7-35? Thanks!
http://www.youtube.com/watch?v=sJ49kyulIec
Is the great planes military Stearman too small for the 7-35? Thanks!
http://www.youtube.com/watch?v=sJ49kyulIec
09-28-2012, 07:08 PM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: Pull Up Now!
Skypup, your question about the GP Stearman has two parts to it. First, is the power developed by the engine appropriate for the airframe. Secondly, is the physical size of the engine approximately correct. The 35cc Evolution radial engine is about 7.5'' diameter The dummy radial that comes with the kit is about 8'' diameter. So that's not too far off. It only is shy by 1/4'' per side. Power is another matter. The 35cc only generates about 2.2 HP, which equates to about 110watts per lb for the Stearman. This is enough power to fly, but it would be pretty scale-like. The Stearman is built pretty solid, and there may be some opportunities to lighten the airframe during the build. The Evolution engine weighs 500 grams (1.1 lbs) MORE than the Saito 120, so this is quite a lot of difference. That weight difference could bring the performance down to 103 watts/lb, which is even worse. So, in sum, I think it would work, but I'd look for ways to lighten the plane.
ORIGINAL: skypup50
Is the great planes military Stearman too small for the 7-35? Thanks!
http://www.youtube.com/watch?v=sJ49kyulIec
Is the great planes military Stearman too small for the 7-35? Thanks!
http://www.youtube.com/watch?v=sJ49kyulIec
Thanks. I have been thinking of the os 160 twin vs the 7-35. You have me wondering now. The os is 2.0 hp and weighs 38 ounces. I'd like to use a multicylinder 4 stroke for the realistic sound. I just want to do some basic scale flying with a few loops, rolls, stall turns and spins.
09-28-2012, 11:19 PM
#611
RE: UMS Evolution Radial Care and Operation
I forgot to mention, I own a GP Stearman and you'll not find a better-flying biplane. It's very well behaved in all maneuvers. A few years ago, I converted a Saito Golden Knight 150 to gas ignition, and it's been flying without trouble ever since. The engine has a lot of torque, so it pulls steadily through every loop.
09-29-2012, 04:55 AM
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RE: UMS Evolution Radial Care and Operation
Can someone tell me which radial would fly this beaver? Radial cowl, not sure of the diameter. Thanks.
http://www.troybuiltmodels.com/items...VER-95BAF.html
http://www.troybuiltmodels.com/items...VER-95BAF.html
09-29-2012, 06:42 AM
#613
RE: UMS Evolution Radial Care and Operation
ORIGINAL: skypup50
Can someone tell me which radial would fly this beaver? Radial cowl, not sure of the diameter. Thanks.
http://www.troybuiltmodels.com/items...VER-95BAF.html
Can someone tell me which radial would fly this beaver? Radial cowl, not sure of the diameter. Thanks.
http://www.troybuiltmodels.com/items...VER-95BAF.html
You are running into the same problem that many people do who want to buy an Evolution radial. The displacements, size, and HP do not easily fit available models out there. Choose wrong, and you can waste $500 on a kit in no time. For fitting, most companies don't give adequate info on the cowl size to be sure a radial will fit. For the Husky, after watching TBM's video to make sure they didn't mention the cowl diameter, I ended up scaling a drawing in Autocad to get the approx. cowl diameter. See the picture below. From that, I found the cowl is 10.2% of the wingspan, which yields 9.69" diameter. But that's theoretically the OD of the cowl. I subtracted 1/32" for each cowl wall and came up with a base number of 9.625" diameter for the inside.
So that means either the 35 or 77cc Evolution would physcially fit. But the cowl is a little tapered, so the question is "HOW TAPERED"? The only way to know for sure is to contact TBM by phone and get exact measurements of the cowl. The larger engine has, at the cowl widest point, 7/16" clearance per side. Taper the cowl down and that clearance disappears pretty quickly.
But before you do that, examine horsepower because that will eliminate both engines. The 77 is 197 watts/lbs, WAY too much power unless you buy the floats. And the 335cc is too little power, at 98 watts/lb. The GP Stearman was a bit better match than the Husky.
To accomplish the work you're attempting, and from the questions you're asking Skypup, you need to equip yourself with the necessary tools and knowledge to answer many of these questions yourself. If you private message me and I'll help you get started.
09-29-2012, 07:31 AM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: Pull Up Now!
You are running into the same problem that many people do who want to buy an Evolution radial. The displacements, size, and HP do not easily fit available models out there. Choose wrong, and you can waste $500 on a kit in no time. For fitting, most companies don't give adequate info on the cowl size to be sure a radial will fit. For the Husky, after watching TBM's video to make sure they didn't mention the cowl diameter, I ended up scaling a drawing in Autocad to get the approx. cowl diameter. See the picture below. From that, I found the cowl is 10.2% of the wingspan, which yields 9.69'' diameter. But that's theoretically the OD of the cowl. I subtracted 1/32'' for each cowl wall and came up with a base number of 9.625'' diameter for the inside.
So that means either the 35 or 77cc Evolution would physcially fit. But the cowl is a little tapered, so the question is ''HOW TAPERED''? The only way to know for sure is to contact TBM by phone and get exact measurements of the cowl. The larger engine has, at the cowl widest point, 7/16'' clearance per side. Taper the cowl down and that clearance disappears pretty quickly.
But before you do that, examine horsepower because that will eliminate both engines. The 77 is 197 watts/lbs, WAY too much power unless you buy the floats. And the 335cc is too little power, at 98 watts/lb. The GP Stearman was a bit better match than the Husky.
To accomplish the work you're attempting, and from the questions you're asking Skypup, you need to equip yourself with the necessary tools and knowledge to answer many of these questions yourself. If you private message me and I'll help you get started.
ORIGINAL: skypup50
Can someone tell me which radial would fly this beaver? Radial cowl, not sure of the diameter. Thanks.
http://www.troybuiltmodels.com/items...VER-95BAF.html
Can someone tell me which radial would fly this beaver? Radial cowl, not sure of the diameter. Thanks.
http://www.troybuiltmodels.com/items...VER-95BAF.html
You are running into the same problem that many people do who want to buy an Evolution radial. The displacements, size, and HP do not easily fit available models out there. Choose wrong, and you can waste $500 on a kit in no time. For fitting, most companies don't give adequate info on the cowl size to be sure a radial will fit. For the Husky, after watching TBM's video to make sure they didn't mention the cowl diameter, I ended up scaling a drawing in Autocad to get the approx. cowl diameter. See the picture below. From that, I found the cowl is 10.2% of the wingspan, which yields 9.69'' diameter. But that's theoretically the OD of the cowl. I subtracted 1/32'' for each cowl wall and came up with a base number of 9.625'' diameter for the inside.
So that means either the 35 or 77cc Evolution would physcially fit. But the cowl is a little tapered, so the question is ''HOW TAPERED''? The only way to know for sure is to contact TBM by phone and get exact measurements of the cowl. The larger engine has, at the cowl widest point, 7/16'' clearance per side. Taper the cowl down and that clearance disappears pretty quickly.
But before you do that, examine horsepower because that will eliminate both engines. The 77 is 197 watts/lbs, WAY too much power unless you buy the floats. And the 335cc is too little power, at 98 watts/lb. The GP Stearman was a bit better match than the Husky.
To accomplish the work you're attempting, and from the questions you're asking Skypup, you need to equip yourself with the necessary tools and knowledge to answer many of these questions yourself. If you private message me and I'll help you get started.
PM sent
09-29-2012, 02:14 PM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: redball8
They (radials) look much better with the cylinders exposed - pick a subject that doesn't have a cowl!
They (radials) look much better with the cylinders exposed - pick a subject that doesn't have a cowl!
09-29-2012, 05:16 PM
#617
RE: UMS Evolution Radial Care and Operation
I am attempting to put the 77 radial engine on a top flight corsair ARF. there is only about 3 eighths of an inch clearance all the way around to the heads on the motor and the inside surface of the cowl. but the finished weight of the model is about 22 to 25 pounds, which is a great fit for the 77 radial. I have a back out plan to slightly enlarged the cowl if I need to.
09-29-2012, 06:11 PM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: Pull Up Now!
I am attempting to put the 77 radial engine on a top flight corsair ARF. there is only about 3 eighths of an inch clearance all the way around to the heads on the motor and the inside surface of the cowl. but the finished weight of the model is about 22 to 25 pounds, which is a great fit for the 77 radial. I have a back out plan to slightly enlarged the cowl if I need to.
I am attempting to put the 77 radial engine on a top flight corsair ARF. there is only about 3 eighths of an inch clearance all the way around to the heads on the motor and the inside surface of the cowl. but the finished weight of the model is about 22 to 25 pounds, which is a great fit for the 77 radial. I have a back out plan to slightly enlarged the cowl if I need to.
Pictures ??? I have a ASP 400 5 Cyl Radial about to arrive and am going to see if it will fit on the TF Corsair. Some pictures of what you're doing would be of great help.
Thanks,
Galen
09-30-2012, 02:28 AM
#619
RE: UMS Evolution Radial Care and Operation
Booker, I haven't actually started construction yet. Box will be cracked open when the first snows fly. However, I have fitted the engine to the cowl to make sure it works. It's tight, but I think doable. The ASP400 radial is 1/8" smaller(8.66") in diameter than the Evolution 77 (8.78") I'm using. So you're in good shape fitting the engine. The only issue is how much, if any, built-in right thrust we can tolerate without contacting the cowl.
09-30-2012, 05:00 AM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: skypup50
Suggest a few. I've spent the day looking thru all the plans that RC Modeler has (over 500) and the Flying Models site and am still looking. The correct sized Spirit of St Louis would be cool. I like Maxam's Robin 99 but that has been out of production for years. Could put it on a Stick plane. I need suggestions and am somewhat frustrated at this point. I want one badly but the OS FT 160 would be much more versatile and work in many more air frames. Anybody know how much thrust the 7-35 can generate?
ORIGINAL: redball8
They (radials) look much better with the cylinders exposed - pick a subject that doesn't have a cowl!
They (radials) look much better with the cylinders exposed - pick a subject that doesn't have a cowl!
09-30-2012, 05:11 AM
#621
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RE: UMS Evolution Radial Care and Operation
Has today been out flying my Stearman with 7-35.
Autumn has come a long way here in Sweden.
In a month it is winter here.
The fly is still amazing
Lars
Autumn has come a long way here in Sweden.
In a month it is winter here.
The fly is still amazing
Lars
09-30-2012, 06:41 AM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: redball8
Concept Fleet or any Stearman, if you want a kit to start with. Out of Production (OOP) kits like the Robinhood 99 or Sperry Messnger show up from time tio time (see (http://www.ebay.com/itm/170916997027...84.m1423.l2649), perfect for a Saito 170). Ryan PT-22, Monocoupe 110, Kinner Sportster, Davis D1W or Curtiss Robin are a few if you up for building from plans. Lots of scale subjects starting with exposed cylnders then put a cowl on later, like the Gee Bee Y.
ORIGINAL: skypup50
Suggest a few. I've spent the day looking thru all the plans that RC Modeler has (over 500) and the Flying Models site and am still looking. The correct sized Spirit of St Louis would be cool. I like Maxam's Robin 99 but that has been out of production for years. Could put it on a Stick plane. I need suggestions and am somewhat frustrated at this point. I want one badly but the OS FT 160 would be much more versatile and work in many more air frames. Anybody know how much thrust the 7-35 can generate?
ORIGINAL: redball8
They (radials) look much better with the cylinders exposed - pick a subject that doesn't have a cowl!
They (radials) look much better with the cylinders exposed - pick a subject that doesn't have a cowl!
Thanks RedBall. Found this today and it looks great with the 7-70
http://www.propman.de/2.html
http://www.youtube.com/watch?v=THkucyhwaNk&feature=plcp
09-30-2012, 07:37 AM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: Linkan2
Has today been out flying my Stearman with 7-35.
Autumn has come a long way here in Sweden.
In a month it is winter here.
The fly is still amazing
Lars
Has today been out flying my Stearman with 7-35.
Autumn has come a long way here in Sweden.
In a month it is winter here.
The fly is still amazing
Lars
Are you flying the great planes military PT-17 and how does it fly? does the power seem marginal or are you satisfied? Thanks!
09-30-2012, 08:13 AM
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RE: UMS Evolution Radial Care and Operation
ORIGINAL: Linkan2
Yes it is great planes military PT-17,and the powe is satisfide++
have you sin the video??
Lars
Yes it is great planes military PT-17,and the powe is satisfide++
have you sin the video??
Lars
Yes....looks great! Wanted to be sure! Now I will buy the 7-35! Thanks a lot!