Hi.
Seing here and there many advertisements for this engine i was thinking of trying one.
Do you own any of the CD series and especially for 91 CD?
Also post your pics and your oppinions!

Hi Kostas1,

Simply put, I love the RCV engines. Here are some links to discussions and reviews of the RCV engines - especially the 91.

[link=http://www.*************.co.uk/4um/index.php?topic=10205.0]Review of 91CD[/link]
[link=http://www.*************.co.uk/4um/index.php?topic=23876.0]Follow-up article on further flying the 91 CD[/link]
[link=http://www.*************.co.uk/4um/index.php?topic=23876.0]My thread commenting on how well my new 91 ran[/link]
[link=http://www.*************.co.uk/4um/index.php?topic=24004.0]Thread discussing how to manage the oil from the crankcase vent on th RCV engines[/link]
[link=http://www.flying-models.org/Videos/Spitfire%20Maiden.wmv]Link to recent maiden of my Sportsman Aviation Spitfire powered by this engine[/link]




One of the things I like about the CDs is their low height - they fit well into scale cowls.

I have no relationship with RCV other than as a very satisfied customer. Their engines work very well, and are my standard/preferred engine for all my planes (I currently own two 58CDs, and the 91CD and recently sold a 60SP to help fund the Spitfire). RCV are also extremely responsive to queries on the support threads (see links above) and here on RCU.

Good luck with your decision!

Regards,
Richard

SO,
do you think there are good engines for a guy that hasn't own any 4str.yet?

Kostas, yes I do. They run well inverted, I've found that they are easy to tune and they have no valves to adjust (unlike most/all other 4-strokes). They are perhaps a little heavier than other 4-strokes but I've not found this a problem (and can be useful on short-nosed warbirds!)

Use the right fuel and plug and run them in as recommended and I'm sure you'll be happy. They improve in power over the first few hours of running and I've noticed a few hundred to 1000 RPM improvement is not unusual as it beds in. By the way, they test run all their engines before shipping them so when it arrives you know it has been run successfully and it is also close to properly adjusted!

What plane are you planning to fit it to?

Richard

I have a new Hangar 9 Corsair.
i bought an OS 91 Fx for it,but i was always thinking of bying one RCV engine.
Also can i start this engine by hand?
Because i don't have an electric starter.

Kostas,

Yes, I would think that this engine would be fine for it - did you look at my video of my Spitfire with the RCV 91CD? That engine had about 60 minutes run time when that video was taken.

You will probably battle to hand start the RCV until it is run in for at least 15 - 30 minutes (but I think that this is probably true for most glow engines). I could bump start (spin clockwide against compression) from about 15 minutes running - I simply grip the spinner and give it a clockwise twist ensuring that it is nicely 'wet' with fuel and is just past TDC.

I normally use an electric starter when first starting the engine (I'm lazy and its cold here!) but if the plane noses over during taxiing for takeoff (I fly off a fairly rough grass strip) then I can easily bump start it on the field without going back for my starter.

Hope this helps.

Regards,
Richard

Yes i saw it.
Awsome plane and realistic sound.
As you said,the manufacturer tests the engines before shipping them to customers.
So how much time he runs the engine?
Also he makes adjustment for idle lets say?
And also as i saw these engines don't have valves to adjust??

Thanks!
I don't know how long they run them for but it is enough and the engines usually start and run reliably without any further adjustment when you get them. You will have to adjust the settings when:
[ul][*] you change fuel[*] you change prop[*] you change plug[*] you fly at a different altitude[*] the engine beds in etc.
[/ul]
These engines are not difficult to adjust and actually run surprisingly well when badly adjusted (I'm not suggesting that you do this, though!) and this will help you get used to the 4-stroke. In fact, there is very little difference between running an RCV CD engine and most 2-strokes and it is probably easier to tune.
Correct. There are no valves in the ordinary sense with tappets etc. The RCV use a Rotating Cylinder Valve. This is a cylinder that rotates inside an outer case. This cylinder has a port that matches ports in the outer case to enable intake, firing and exhaust. the rotating cylinder also helps distribute heat and prevent hot spots.

[link=http://www.rcvengines.com/how-it-works.htm]How it works[/link]

I hope this helps. Please post pictures of your plane when it is finished.

Wow,thank you for your knowledge.
It helps!
Also i want to ask you if you have any experience with SP series???
i saw the 91 and 120 SP and thought if you can start them by hand(???) or with a regular glowstarter?
And another question:
RCV engines are "English" engines.I mean there manufactured in the United Kingdom?
Also in comparison to the OS 91 Surpass what do you have to say?{I mean compare the RCV 91 CD vs OS 91 Surpass}.
[sm=drowning.gif]

http://www.rcvengines.com/pdf_files/...d%20review.pdf

Kostas, here is a review by larence Lee on the RCV .91 CD