Everything Radial Engines
#3177
Senior Member
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
[Hi 77chickenhawk
... They also seem to have some very interesting features, but asKweasel says, we are lacking technical information, like parts diagrams, photos of internal parts, reviews, etc. I wonder why the Seidel-UMS-Evo only needs 6% oil in the fuel when every(?) other glow engine needs 18+%? Has anyone taken their Seidel apart yet?
With Horizon now behind them, I am sure they will sell lots. Including at least oneto me...
Regards, radial1951
________________
[/quote]
Radial1951
Thanks for your comments and your interest. We are currently working on the appropriate artwork and parts listings to add them to our web pages, with new instruction manuals. As for the oil question the reason is the conrods have ballbearings in them intead of bushings, which is the reason most glow engines require a much larger amount of oil in the fuel.
Pete
#3178
Senior Member
Join Date: Aug 2009
Location: NSW, AUSTRALIA
Posts: 204
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
[quote]ORIGINAL: Pete Bergstrom
Thanks for your comments and your interest. We are currently working on the appropriate artwork and parts listings to add them to our web pages, with new instruction manuals. As for the oil question the reason is the conrods have ballbearings in them intead of bushings, which is the reason most glow engines require a much larger amount of oil in the fuel.
Pete
[/quote
Thanks Pete, I was hoping you would comment on the oil ratio. How about some "teaser" close-ups of an Evo Radial with the back off and one in pieces showing the cam drive etc??
That would keep some of us excitied...
![](https://www.rcuniverse.com/forum/js/fckeditor/editor/images/smiley/msn/wink_smile.gif)
Regards, radial1951
________________
#3180
![](/forum/images/badges/premium_member.png)
My Feedback: (27)
Join Date: Sep 2005
Location: Northbrook,
IL
Posts: 90
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
The ball bearings is an interesting answer on the oil ratio. I had another idea, but am by no means a mechanical expert.
Would another contributing factor involve how the intake tubes draw fuel mixture from the carb and through the crankcase? I always thought it a benefit that all of those conrods spinning around in the case would create a natural impellor effect and keep the mixture nice and even. I also thought that it might do a great job of lubrication as well even on 6% given that internals are directly lubricated by the mixture instead of relying on piston blow-by, etc.
Am I on to something, or just confusing an otherwise easily explained answer? My appologies if it's the latter.....
Would another contributing factor involve how the intake tubes draw fuel mixture from the carb and through the crankcase? I always thought it a benefit that all of those conrods spinning around in the case would create a natural impellor effect and keep the mixture nice and even. I also thought that it might do a great job of lubrication as well even on 6% given that internals are directly lubricated by the mixture instead of relying on piston blow-by, etc.
Am I on to something, or just confusing an otherwise easily explained answer? My appologies if it's the latter.....
#3182
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
You know that 62% giant Stearman brought back memories of people wanting me to do their maiden flights on their planes in the past. I sorta got where I hated to do it, as if something went wrong with the plane in the air, and it crashed, I would feel bad about it.
I can't beleive someone really built a plane that big. One could fly in it.
It did fly really nice though.
I can't beleive someone really built a plane that big. One could fly in it.
It did fly really nice though.
#3183
Senior Member
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
ORIGINAL: stevesak
The ball bearings is an interesting answer on the oil ratio. I had another idea, but am by no means a mechanical expert.
Would another contributing factor involve how the intake tubes draw fuel mixture from the carb and through the crankcase? I always thought it a benefit that all of those conrods spinning around in the case would create a natural impellor effect and keep the mixture nice and even. I also thought that it might do a great job of lubrication as well even on 6% given that internals are directly lubricated by the mixture instead of relying on piston blow-by, etc.
Am I on to something, or just confusing an otherwise easily explained answer? My appologies if it's the latter.....
The ball bearings is an interesting answer on the oil ratio. I had another idea, but am by no means a mechanical expert.
Would another contributing factor involve how the intake tubes draw fuel mixture from the carb and through the crankcase? I always thought it a benefit that all of those conrods spinning around in the case would create a natural impellor effect and keep the mixture nice and even. I also thought that it might do a great job of lubrication as well even on 6% given that internals are directly lubricated by the mixture instead of relying on piston blow-by, etc.
Am I on to something, or just confusing an otherwise easily explained answer? My appologies if it's the latter.....
No apologies necessary.
You are right, the conrods rotating and all that oily mixture does do wonders for the bearings in the engines, but the low oil content would not do well for bushings. A case in point would be any standard two stroke glow engine. The fuel generally goes right through the crank, into the crankcase and gets agitated around by the conrod yet we still need anywhere from 14-18% oil to have any life from the bushing at the lower end of the conrod.
Pete
#3184
![](/forum/images/badges/premium_member.png)
My Feedback: (62)
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
Stevesak, To help Pete answer your question, A little BMW motorcycle history. The older models used a pressed up crankshaft so that roller bearings could be used on the big end of the one piece connecting rods. These bearings required small amounts of oil and therefore the oil pump to the crankshaft was a weak low flow design. Too much oil caused these bearings to run hot! The later engine design had a one piece crankshaft and the two piece connecting rods used shell bearings which are basically bushings. The oil pump had to supply much greater amounts of oil at higher pressure to lubricate and actually COOL these bearings. Same concept with the radials. -Tom
#3185
![](/forum/images/badges/premium_member.png)
My Feedback: (27)
Join Date: Sep 2005
Location: Northbrook,
IL
Posts: 90
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
Thanks to both of you for clarification. Ill be sur to make a mental note for future reference.
On another note, does anyone know if it possible to edit a much older post? It has been brought to my attention today that I misspoke on a post from 4 years ago concerning the availability of plans for the Forest Edwards radial construction project. It was back in post #1100, and I stated the following....
"The big 5.7ci engine is the Forest Edwards radial. This is an example of what happens when someone builds one of thier own. He built one.... flew it and made a dozen or so more. Then he made a bigger one on ingition (like the one shown) and made a nother dozen or so more (30 in total). Others have made them too as the plans are in the public domain and are free to be had (glow version only). "
What I should have stated is "Other have made them too as the plans are available by joining the R_and_R_engines group to obtain a free copy of the plans for personal use (glow version only"
It seems that they are not specifically available on the public domain. Perhaps a moderator can help?
On another note, does anyone know if it possible to edit a much older post? It has been brought to my attention today that I misspoke on a post from 4 years ago concerning the availability of plans for the Forest Edwards radial construction project. It was back in post #1100, and I stated the following....
"The big 5.7ci engine is the Forest Edwards radial. This is an example of what happens when someone builds one of thier own. He built one.... flew it and made a dozen or so more. Then he made a bigger one on ingition (like the one shown) and made a nother dozen or so more (30 in total). Others have made them too as the plans are in the public domain and are free to be had (glow version only). "
What I should have stated is "Other have made them too as the plans are available by joining the R_and_R_engines group to obtain a free copy of the plans for personal use (glow version only"
It seems that they are not specifically available on the public domain. Perhaps a moderator can help?
#3187
Junior Member
My Feedback: (6)
Join Date: Dec 2003
Location: Milan, MN and Brumunddal Norway
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
The Stearman had both 7 cylinder Continental, and 9 cylinder Lycoming engines.
I know this engine fits nicely in the Super Sterman also, as I posted pictures of it inside the cowl about a year ago here.
The new GP Wacho will also be a great combination with this engine I'm pretty sure it fits, but Tower are sold out.
I know this engine fits nicely in the Super Sterman also, as I posted pictures of it inside the cowl about a year ago here.
The new GP Wacho will also be a great combination with this engine I'm pretty sure it fits, but Tower are sold out.
#3188
![](/forum/images/badges/premium_member.png)
My Feedback: (56)
Join Date: Aug 2003
Location: greenville , SC
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
TOTALLY AGREE WITH YOU GUYS ABOUT MODEL RADIALS; BUT EVOLUTION IS UNVEILING ITS 260cc 7 CYLINDER RADIAL, LOOKS BEAUTIFUL. NEED TO HEAR IT RUN. TROUBLE WITH THESE GUYS IS THAT THEY ALLOW THE ENGINES TO REV WAY UP WITH SMALL PITCHED PROPS. I HAD THE OS SIRIUS RADIAL, HATED THE SOUND AND THE GOO. THE FOUR STROKE GAS RADIALS SOUND BETTER, IF PROPPED RIGHT, BUT TAKE A LOOK AT THE EVO 7 CYL
#3189
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
they are the UMS engines,, not complaining,im glad more people are going to stock them.. hopefully it will keep the cost competitive. Its all Siedel technology,so I want 2 of each..
![Big Grin](https://www.rcuniverse.com/forum/images/smilies/biggrin.gif)
#3190
![](/forum/images/badges/trading_plus_member.png)
Join Date: Apr 2009
Location: Oberschoena, GERMANY
Posts: 267
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
Hi,
my friend Volker bought an unusual radial engine lately:
![](http://www.tiffe.de/images/llll1.jpg)
![](http://www.tiffe.de/images/llll2.jpg)
![](http://www.tiffe.de/images/llll3.jpg)
![](http://www.tiffe.de/images/llll4.jpg)
![](http://www.tiffe.de/images/llll5.jpg)
![](http://www.tiffe.de/images/llll6.jpg)
..it looks like an unfinished self made project to me.
Does anyone here know more about this fragment,
eg if this is build following some plans that are known
or so?
Kind Regards,
Holm
~
my friend Volker bought an unusual radial engine lately:
![](http://www.tiffe.de/images/llll1.jpg)
![](http://www.tiffe.de/images/llll2.jpg)
![](http://www.tiffe.de/images/llll3.jpg)
![](http://www.tiffe.de/images/llll4.jpg)
![](http://www.tiffe.de/images/llll5.jpg)
![](http://www.tiffe.de/images/llll6.jpg)
..it looks like an unfinished self made project to me.
Does anyone here know more about this fragment,
eg if this is build following some plans that are known
or so?
Kind Regards,
Holm
~
#3191
![](/forum/images/badges/premium_member.png)
Join Date: Jun 2011
Location: Sint Niklaas, BELGIUM
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
ORIGINAL: earlwb
You know that 62% giant Stearman brought back memories of people wanting me to do their maiden flights on their planes in the past. I sorta got where I hated to do it, as if something went wrong with the plane in the air, and it crashed, I would feel bad about it.
I can't beleive someone really built a plane that big. One could fly in it.
It did fly really nice though.
You know that 62% giant Stearman brought back memories of people wanting me to do their maiden flights on their planes in the past. I sorta got where I hated to do it, as if something went wrong with the plane in the air, and it crashed, I would feel bad about it.
I can't beleive someone really built a plane that big. One could fly in it.
It did fly really nice though.
famous airfield in Europe and they do have a huge flying museum like the Rhinebeck in the US but much larger. It was the main WW1 airplane base of the Germans.
Who said there is'nt any flying in Belgium anymore ? Personally it is a little too big to my taste but it remains impressive.
#3192
![](/forum/images/badges/premium_member.png)
Join Date: Jun 2011
Location: Sint Niklaas, BELGIUM
Posts: 26
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
Here's another Belgian large airplane by another friend of mine Wim van Schoor also at the La Ferté airshow.
Guess you all know what plane it is.
Guess you all know what plane it is.
#3194
Senior Member
Join Date: Jan 2007
Location: Klaukkala, FINLAND
Posts: 267
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
I'm probably the "smallest" radial guy here with Saito FA90R3 in a Pitts Special S-2C with WS just shy of 1,2 meters (50-size). The plane is a modified Kyosho ARF originally but I fitted my own cowl and this small Saito radial engine.
![](http://i5.photobucket.com/albums/y176/JariV/06082011122.jpg)
![](http://i5.photobucket.com/albums/y176/JariV/06082011119.jpg)
Maybe first start ever today. The cowl is oversized but I wanted to be sure that the engine would get enough cooling so I can get all the power out of it.
![](http://i5.photobucket.com/albums/y176/JariV/06082011122.jpg)
![](http://i5.photobucket.com/albums/y176/JariV/06082011119.jpg)
Maybe first start ever today. The cowl is oversized but I wanted to be sure that the engine would get enough cooling so I can get all the power out of it.
#3197
Senior Member
Join Date: Jan 2007
Location: Klaukkala, FINLAND
Posts: 267
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
Thank you for the comments.
I shot a small video yesterday of it just idling and some rpms from engine break-in. The engine started immediately which was a very nice surprise. I thought it would have been much harder to get it started for the first time.
Total weight is 3,8kg without fuel.
Video from yesterday's break-in:
http://www.youtube.com/watch?v=Kn-fzX6gxcg
I shot a small video yesterday of it just idling and some rpms from engine break-in. The engine started immediately which was a very nice surprise. I thought it would have been much harder to get it started for the first time.
Total weight is 3,8kg without fuel.
Video from yesterday's break-in:
http://www.youtube.com/watch?v=Kn-fzX6gxcg
#3199
Senior Member
Join Date: Jan 2007
Location: Klaukkala, FINLAND
Posts: 267
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.rcuniverse.com/forum/images/icons/icon1.gif)
I'm using a SonicTronics McDaniel OnBoardGlow system to light up the glowplugs. Very good piece and worth every cent. As exhaust I am using a Keleo exhaust ring.