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Classic 40/45 power choice?

Old 05-22-2013, 05:08 AM
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tgwhitley
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Default Classic 40/45 power choice?

What is one the availability of good 40/45 size engines especially in rear exhaust? Should 4 stroke be considered or electric conversion? I think we need to consider different opinions on the forum about this issue. There seems to be interest in a project for a classic 40/45-size plane so a discussion about power would be helpful for me.
Thanks
Tim
Old 05-22-2013, 10:35 AM
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Jim Oliver
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Default RE: Classic 40/45 power choice?

There are a few of the rear exhaust YS 45s around and Rossi made a rear exhaust 45 some years agogood luck finding either
Old 05-22-2013, 11:21 AM
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Default RE: Classic 40/45 power choice?

Jim's comment about the RE Rossi is spot on. They're next to impossible to find. I started a thread recently (on RCU I believe) to discuss this engine as I happened to be lucky enough to find one. I suspect it will be perfect, given the header I have for it, for a Citation 45.

On the other hand, I have had plenty of success sourcing YS 45's both in side and rear exhaust configurations. A simple wanted ad should produce one or two within a short time and the YS 45 is perhaps the most powerful RE 45 still around.

Another pair of options for RE configurations are: 1) at the high end, a Jett 60 could be used as this engine is specifically built into a 45 size case. It is also designed to turn smaller props (10") at high rpm and I suspect it would be another ideal light candidate for the Citation. 2) At the other end of the spektrum, in terms of cost and performance, is the MVVS 40 which is indeed a very good engine by all reports but it is a 40 and is likely not in the same power league as the YS, OS or Rossi. The nice thing about the MVVS is that it can be setup as SE or RE before its first run. Once the configuration is chosen, it should not be changed.

I mentioned OS above and certainly the OS 40 and 46 VF (-P) are other well known options that were commonly used by the Japanese in their designs. These are harder to source than the YS (in my experience) but not impossible. I have been able to locate a 40 VF-P and I believe the engine can probably be turned into a 46 by transferring the guts (crankshaft, piston and sleeve) of a 46 SF into the 40 VF crankcase. This is really just a theory but I believe it might be possible. The ramification of course is that parts for your VF can be easily had by sourcing SF engines. On the downside, the 46 SF seems to be the rarest of the great SF line with the 61's, 40's, and 25's being more readily available in that order (from high to low).

There may be other options out there that I'm not aware of and would be interesting to hear about. OPS and Picco made a RE 46 (now very rare) but from what I know Webra never did.

David
Old 05-22-2013, 01:03 PM
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Default RE: Classic 40/45 power choice?

VF40's and 46's can be found from C/L Stunt guys, too. They were popular pipe engines. Stunthangar.com and Stukastuntforums have classifieds for want ads as well. I had 3 VF 46's but sold them off, sorry.
Chris...
Old 05-22-2013, 01:44 PM
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Jim Oliver
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Default RE: Classic 40/45 power choice?

One of my contacts, former MVVS dealer, has said that MVVS isn't making glow engines at present. Great engines if you can find one.......
Old 05-22-2013, 02:18 PM
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Default RE: Classic 40/45 power choice?

Jim,

That is undoubtedly true. They do however have plenty for sale as well as parts. They also come up about twice a month on the auction site. They go for about $75.

I'm looking forward to running mine in RE configuration along with the Rossi RE to see how they both fare. I plan to use the MVVS tuned can exhaust as well as standard pipes.

David
Old 05-22-2013, 05:41 PM
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lfinney
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Default RE: Classic 40/45 power choice?

I currently own 2 of the rossi 45 re engine nib and one of the vf 45 Nib as well, the os engines are more common, but a 7.5 K&b or a Picco RE or side exhaust are good candidates as well. the sleeper engine is the Irvine Re 40
Old 05-22-2013, 06:50 PM
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tgwhitley
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Default RE: Classic 40/45 power choice?

OS FS 62v will this engine work in Citation 45 or other classic design? Weight appears to be about 2 ounces heavier than 2 stroke will turn 11 x 8 nicely.

Tim


Old 05-24-2013, 01:55 AM
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DerFly
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Default RE: Classic 40/45 power choice?

Does the OPS 40 spa rca or OPS Monza Sport 40 count in this regard?

Both a little below the "modern" 46 milestone but nevertheless both cracking engines in their own right.

DF
Old 05-24-2013, 06:33 AM
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Default RE: Classic 40/45 power choice?

There's always Jett....
Old 05-24-2013, 10:33 AM
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Default RE: Classic 40/45 power choice?

The OS .55AX will not disappoint, a great choice for the side exhaust application.
-Robert
Old 05-24-2013, 01:25 PM
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NM2K
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Default RE: Classic 40/45 power choice?

ORIGINAL: tgwhitley

What is one the availability of good 40/45 size engines especially in rear exhaust? Should 4 stroke be considered or electric conversion? I think we need to consider different opinions on the forum about this issue. There seems to be interest in a project for a classic 40/45-size plane so a discussion about power would be helpful for me.
Thanks
Tim


To be honest with you, the YS .45 two-stroke and the .63 to .70 four-strokes would be my choices. Especially the four-strokes. The four-strokes by YS are unmatchable by any two-stroke in the .40 to .52 displacement range. I'm not referring to just horsepower, but tractability also.


Ed Cregger
Old 05-24-2013, 11:17 PM
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Default RE: Classic 40/45 power choice?

ORIGINAL: NM2K

To be honest with you, the YS .45 two-stroke and the .63 to .70 four-strokes would be my choices. Especially the four-strokes. The four-strokes by YS are unmatchable by any two-stroke in the .40 to .52 displacement range. I'm not referring to just horsepower, but tractability also.

Ed Cregger
Right On!! The current YS-70 four stroke would be a great power plant!! Using the Hatori wrap around header and short pipe makes it a nice rear exhaust set-up...Great suggestion Ed!!

Chuck
Old 05-25-2013, 08:40 AM
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rcjunkee
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Default RE: Classic 40/45 power choice?

for side exhaust the Webra 50. Light and powerful.
Old 05-25-2013, 11:33 AM
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Default RE: Classic 40/45 power choice?

In the midst of other RE Italian engine discussion, we forgot to mention the venerable SuperTigre X40 and X45 FIRE. These are the front intake version of the famous F1 X40 RIRE engines.

They are somewhat hard to find but not impossible. I have been able to source one of each over the last year. The Macs headers I picked unfortunately don't fit properly as the engine exhaust and header mount flange is very narrow and the screws interfere with the header pipe. A little work on the header should sort it out though.

David
Old 05-25-2013, 12:03 PM
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dphill2
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Default RE: Classic 40/45 power choice?

You guy's need to look at the FIRE 46 from Nova Rossi !! I'm sure that would make a real good small Pattern mota..

Dave.
Old 05-25-2013, 03:04 PM
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Default RE: Classic 40/45 power choice?

ORIGINAL: dphill2

You guy's need to look at the FIRE 46 from Nova Rossi !! I'm sure that would make a real good small Pattern mota..

Dave.
Is this Nova/Rossi FIRE 46 a current engine?? I can't find any info...Can you post a link!!
Old 05-25-2013, 06:27 PM
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Default RE: Classic 40/45 power choice?

ORIGINAL: dphill2

You guy's need to look at the FIRE 46 from Nova Rossi !! I'm sure that would make a real good small Pattern mota..

Dave.
Dave,

Yes. The NR was the first engine search I did as I wasn't familiar with their 40 class engines. From what I've been able learn though they are not producing any RE engines in this displacement. The new CR series are SE remote needle valve engines and according to some timed for 3D performance. They're making a 46 and a 57.

A smaller 46 size version of the Speed 61 FIRE would be equally unique! Any chance one might be produced?

Or maybe we're missing something?

David

Edit: Hmm... yes, we are! See below
Old 05-25-2013, 06:56 PM
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Default RE: Classic 40/45 power choice?

Looks like NR already has!

Here's their marine 46. An air cooling head, a drive washer and some timing tweaking for pattern applications and presto fatto! Nice mota indeed!

Dave, what do you think? Any chance the idea might be brought up with NR now that they've put stock into their pattern 61's?

I take it the same headers and pipes used on the 61 would serve here too. Maybe the shorty pipe would also work well on the 46?

Here's a link:

http://www.novarossi.it/2012/index.p...c/to-be46.html

David

No image upload at present. RCU needs to get the skids under the new IT team...
Old 05-25-2013, 07:18 PM
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Default RE: Classic 40/45 power choice?

Check this outhttp://smtdistributing.com/R46-PYLON...LON-w-Carb.htm

Old 05-26-2013, 03:49 AM
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Default RE: Classic 40/45 power choice?


ORIGINAL: Wssmt41833

Check this out http://smtdistributing.com/R46-PYLON...LON-w-Carb.htm

Well Holy Crap!!! There you have it!!! Awesome...
Old 05-26-2013, 04:20 AM
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Default RE: Classic 40/45 power choice?


ORIGINAL: NM2K

To be honest with you, the YS .45 two-stroke and the .63 to .70 four-strokes would be my choices. Especially the four-strokes. The four-strokes by YS are unmatchable by any two-stroke in the .40 to .52 displacement range. I'm not referring to just horsepower, but tractability also.

Ed Cregger
That is the thing I enjoy most about my YS engines is how "tractable" they are...Very easy to manage power, smooth and consistent and always there for you without hesitation at any attitude...

I wonder how these Nova/Rossi engines are in that regard??

Have Fun...

Chuck
Old 05-28-2013, 06:15 AM
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dphill2
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Default RE: Classic 40/45 power choice?

Guy's

This is a shot of the 46 FIRE from Nova Rossi !! Looks just like the Speed 61 so I guess you could call it the Lil Brother. Anyway We are going to put this Engine in a 40 size Pattern plane and see just what it has to offer as a pattern motor. If it's anything like the 61 it will be a new player in the 40 to 46 motor line..
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Old 05-28-2013, 09:21 AM
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Default RE: Classic 40/45 power choice?

Man, that's a cool little engine.
Chris...
Old 05-28-2013, 09:47 AM
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Default RE: Classic 40/45 power choice?

Hey Chris,

If it runs like the Big Brother R61 Speed, it will be something on a 40 size planes !! This is my test airplane that I've been playing around with Pipes and Props with the 61 !! all I can say is WOW what a motor !!

Dave...
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