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RCV-SP Engines

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James4007/12/2009 13:28:42
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885 forum posts
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Can  anyone share any info on these engines, I've seen them advertised in magazines but never read a review or heard anything on them, they seem an ingenious invention with the rotating cylinder and from what little i have read on them, because of the 2:1 crank to prop shaft gearing they are able to swing a 4 blade prop without any issues ?
 
Is there anyone out there running one of these that can give a quick review ?
Bruce Richards07/12/2009 15:51:27
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1849 forum posts
My son has a 120 that he is intending to use in his YT spitfire. We bought it second hand and ran it up on the bench. It started very easily and seemed to have good power but sounded like a bag of spanners. So I sent it off to Westons to check it out. They stripped it down and said it had only had about 20 minutes of running and was in great condition. Not used it in anger yet but should be good.

Edited By Bruce Richards - Moderator on 07/12/2009 18:59:52

flytilbroke07/12/2009 18:40:17
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2080 forum posts
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Seen some of the Warbird Spits, Hurry's and ME109 guys using them at shows, good enough for them so....
Roger in Dubai08/12/2009 05:39:25
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Are these replies referring to the SP or CD range of RCV engines ?  James40 is looking for details on the geared SP range.  Most of the reviews etc I have seen concerning the various warbirds use the CD engines.
 
I do not have any experience of the SP range but can fully recommend the 91 CD.  I have one in my Kyosho Spitfire 90 and it flies at a good scale speed, to me anyway, and has never let me down.  Occasional problems with possible vibration causing the silencer to work loose but apart from that it fires up easily, idles really slowly and is a great engine.
Bruce Richards08/12/2009 09:52:35
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1849 forum posts
There is no 120 CD only a 120SP. The CD is a 130.
James4008/12/2009 12:46:32
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885 forum posts
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Thanks for the replys, yes it's the SP version I was looking at, it will fit nicely in the nose of a warbird without cutting away the cowl and it's alleged ability to swing a 4 blade prop is what really interests me.
I have read good reviews on the CD engine but it's the SP I'm trying to find out about.
Roger in Dubai09/12/2009 09:17:43
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137 forum posts
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OOOPS, silly me, should have read the first post properly.  I even have a 130CD sitting in the cupboard awaiting a suitable project.  Was going in the Spitfire but then battled to find a suitable mount and put the 91 CD out of the Mustang.  BTW, using a 90° manifold adaptor from Just Engines, my complete engine and silencer is within the cowl.  When I work out how to post photos, I will show you, very neat as only a hole for the plug and needle valve on the side of the cowl.  Great for warbirds.
James4009/12/2009 15:16:35
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Register with www.photobucket.com and put your pics on there Roger, it's free and very simple to use, it must be because I use it
 
Would like to see how it all looks.
flytilbroke09/12/2009 15:51:16
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2080 forum posts
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 I too mainly looked at the post, not the header. I have seen a couple working. The owners were not so enthusiastic about them as the guys with the CD variety. However saying that, they did seem to work ok.
Bruce Richards09/12/2009 15:56:24
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1849 forum posts
The main thing to watch with the SPs is the cooling. You must make sure the air is ducted across tghe engine fins and that there is sufficient air outlet area of at least 3 times the inlet area. When you buy a new one Weston provide some very useful documents describing all of this.
Solly19/12/2009 16:08:33
142 forum posts
1 photos
I have the 90 SP in a Short Seamew and agree about the attention to cooling. The usual baffles did not work for me, until on Weston's advice I built a 3 sided box -  it's important that this box is open only at the front ie.- closed off not only at each side but also at the rear, forcing the air through the fins. The engine now runs fine, - I also switched to Weston's Prosyth 10% fuel which contains no castor, this suits the engine very well.
Stephen Jones21/12/2009 22:23:18
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1287 forum posts
785 photos
Hi, i have the 60 sp and i find mine gives a hell of a  kick when running. And i have had to fit  ali plating to stop it working out of its mounting which it has done on several occasions also the supplied silencer has worked lose due to this and now has de threaded its self and will no longer stay on . Has anyone else had this problem ? . The prop iam using is a wood 3 bladed 15x8 and until i can get a new silencer for it ,i can not fly the model.

Ps is there adapter that can be fitted to the existing one as i am using a hex nut driver in my normal starter which flys out . 

Edited By Stephen Jones on 21/12/2009 22:27:35

Solly22/12/2009 10:07:17
142 forum posts
1 photos
Hi, have you balanced the propeller? I use a 4 blade prop and believe me, it was a LONG way out of balance. The engine now runs smoothly after balancing.
Re. the silencer and also a starting adapter both parts are available from Weston UK.
If you have running problems I would send it off to Westons, their service is very good.
Stephen Jones22/12/2009 22:18:12
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1287 forum posts
785 photos
Thanks for the reply , it never occurred to me to balance my prop , however it is something I normally do . Why I didn't do it for this large wooden prop it must be miles out Dho... As for the silencer at weston uk £70 is a bit steep , i'll see if I can make something fit . Cheers,
Chris Perkins 103/12/2012 16:17:53
71 forum posts
97 photos

Hi All,

How do people rate the RCV sp engines more specifically the 120. Engine Doctor did give me his views on them which I do appreciate. Just thought id see what the general view is on these engines.

As long is its got enough in it to pull the Kyosho mustang 90 I'll be happy doesn't need to go through the sounds barrier either.

Thanks, Chris

Edited By Biggles' Elder Brother - Moderator on 03/12/2012 18:06:30

Biggles' Elder Brother - Moderator03/12/2012 18:10:48
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11514 forum posts
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Hi Chris,

moved your post here so its with others on this topic. Check out the site search there are actually very many threads on RCV engines.

BEB

Chris Perkins 104/12/2012 09:41:06
71 forum posts
97 photos

Thanks, I had read this and wanted to see how people are getting on 3 years later with these engines. I guess I could have posted straight into this rather than start a new thread

Martin Harris04/12/2012 09:59:49
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4613 forum posts
119 photos

I do know that early ones had much noisier gears than the current ones. Alan Weston was very keen to point out that since becoming involved with the engine a couple of years ago, several engineering improvements havebeen made and that they were now wonderful pieces of machinery.

But I suppose he would say that, wouldn't he?

 

 

Edited By Martin Harris on 04/12/2012 10:00:05

Chris Perkins 104/12/2012 13:03:01
71 forum posts
97 photos

Yeah I did read about the gears. I'm trying to avoid talking to retailers as they would not stock the engine if they did not think it was really good. They may be really honest but I just get the idea they are trying to sell me it rather than give me advise if you know what I mean.

Solly06/12/2012 10:31:58
142 forum posts
1 photos

Chris, believe me, the 120 SP will have more than enough power for your Mustang. I use a 90 SP with a 4 bladed prop to fly an 11 lb model and most of the flying is done at half throttle. But as has been mentioned, you must use a cooling scoop over the engine.

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