mvigod

Welcome to RCV's direct support forum here at RC Universe. Here you can ask your questions related to the full line of RCV Engines and RCV's technical support staff will respond directly to you in this forum.

All official direct support questions will be answered by RCV Technical Support - UK

Thanks RCV Engiens Limited for providing this valuable service to RCU members.

RCV Engines

Thanks Marc.

We are now ready to take questions but please bear in mind it is now 16:15 PM in the UK so the first opportunity to post replies will be next Monday.

Thanks

RCV Technical Support

Ed Smith

The cooling fins on a "Normal" model engine are parrallel with the airflow. This allows the cooling air to pass between them and remove the collected hot air. In the case of our FAI racing engines we have a shroud around the finned part of the crankcase to force the air through the fins.

The RCV engines have the cooing fins at 90 deg to the airflow. How do these engines cool efficiently? This is not a hostile question. I am seeking real information. Not the "Forum expert" variety.

Thanks,

Ed S

RCV Engines

Hi Ed
Your question is completely valid & thanks for your interest.
The design of the RCV cooling fins are dictated by the manufacturing method - all of the SP series engines are CNC machined from solid not die cast. We have carried out many tests on the RCV engines and the shape of the cooling fins does not greatly affect the cooling of the engine. The RCV design is intended to run at reasonably high temperature and due to the rotation of the cylinder relative to the piston and ports, thermal distribution is very low (unlike a conventional engine).
It is still essential however to provide adequate inlets and outlets for air when installing the engine in a model. If you intend to install the engine in a tight-cowled application, we do recommend arranging a deflection duct to scoop the air over the engine.
If you, or anyone else have any more queries regarding cooling, we are only too happy to answer them.

Thanks

RCV Engines

andybuch

My Feedback: (3)

How well does the RCV120-SP work with the APC 4 bladed prop 15.5x12? What is the performance with this combo (HP, Thrust & RPM)? I'll be putting this engine in my TF P-47. I'm replacing a ST .75, which is way under power for this plane at 11.75 LBS. What do you think?

Andy

RCV Engines

Hi Andy

Thanks for your enquiry. We do recommend an APC 15.5x12 4-bladed prop for the RCV120-SP. Once the engine is run in this should give approximately 5650 rpm and produce about 9.4 lbs of static thrust.
Based on your plane weight, I reckon this prop & engine combination will be perfect for the job.

Please ensure you run the engine in as per instructions before mounting it on your plane.

If you have any more queries, don't hesitate to contact us.

Happy Flying

RCV Engines