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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> RCV Engines Support >> Props
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Props - 2/14/2004 4:02:33 AM   
us1hydro


 

Posts: 63
Joined: 1/5/2003
From: Rose Hill, KS,
Status: offline 		I'm thinking about putting twin RCV 60's on an F&F tigercat I just aquired. The wingspan is aprox 72" and the weight, minus engines & radio is about 8lbs. I understand that the RCV engines have special prop requirements and I'm wondering what 3 blade props would work well on this application. Where can I get them? Would the same props work on a Wing MFG P-38? How about 3 blade props for twin 90's on a Wing MFG B-25? I got a RCV90 and these appear to be very well made engines with great potential for scale models with their ability to fit inside the cowl!

< Message edited by hobbsy -- 2/14/2004 8:32:35 AM >

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He who dies with the most toys WINS!
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RE: Props - 2/16/2004 8:47:36 AM   
RCV Engines


 

Posts: 509
Joined: 4/11/2002
From: WimborneDorset, UNITED KINGDOM
Status: offline 		Thanks for your query and your comments.

Firstly with regard to the Tigercat - the RCV60SP engine has a 2:1 reduction gearing, therefore the speed at the prop is half of the engine speed. You therefore need much larger propellers than conventional engines. We recommend the use of a 13.4x13.5 propeller (or similar). You can get this actual size from www.apcprop.com. Obviously you will need to check that you have enough clearance for these propellers. Without having specific experience with these models we cannot give you definitive advise however a couple of 60SPs should have the power to pull the Tigercat.

Assuming clearance on the P-38 was okay, you could also use this size prop for this application. Another RCV user has put a couple of 58CD's in a P-38 if you are interested, see www.rcvengines.com/gallery_58cd_p38.htm

With regard to the B-25, one of our customers has actually put a couple of 90SP engines in his plane and it looks fantastic. He has cut down 15.75x13 3-bladed APC props to 15x13 and you can view this plane on www.rcvengines.com/gallery_90sp_b25.htm

I hope this information helps
If you have any more questions, please don't hesitate to contact me.

Best regards
Laurenne


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Technical Support
RCV Engines - UK

(in reply to us1hydro)
       Post #: 2

RE: Props - 2/17/2004 8:42:28 PM   
us1hydro


 

Posts: 63
Joined: 1/5/2003
From: Rose Hill, KS,
Status: offline 		Thanks for the response, any way to contact the B-25 builder? I'd like to find out how he made those props! They look GREAT! I have a 90SP in my hands now and a 60SP on the way. Props are a real problem though. Have you considered asking one of the prop manufacturers to make props for your engines? Since the primary use of these engines will be with scale planes it would be nice to have props available that mimic the look of the "real thing". The APC's are good props but lack the "look" of the Hamilton Standard!

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He who dies with the most toys WINS!

(in reply to RCV Engines)
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RE: Props - 2/19/2004 1:14:53 PM   
RCV Engines


 

Posts: 509
Joined: 4/11/2002
From: WimborneDorset, UNITED KINGDOM
Status: offline 		Hi

With regard to contacting the B-25 builder, we do not give out email addresses. However if you want to write an email for him, I can forward it on - use my email address laurenne@rcvengines.com

With regard to propellers, I understand the problems. APC do a good range of propellers, however all the ones that are suitable for our SP series engines are schimitar shape, which is not always what you want for scale. I did approach Master Airscrew at one point, however nothing ever came of this.
Other manufacturers which may be of use are graupner, bolly and (for wooden propellers) zinger.

I hope this helps.
Best regards
Laurenne


_____________________________

Technical Support
RCV Engines - UK

(in reply to us1hydro)
       Post #: 4

RE: Props - 9/26/2007 4:20:35 AM   
Aluminum Overcast


 

Posts: 77
Joined: 9/12/2007
From: Waterford, MI, USA
Status: offline 		I have a really beautiful four blade scale outline prop for my KMP Spitfire made by solo props. They will make any size or shape prop for your application and hold the blades with a hub which you can dial in your desired pitch. not exactly inexpensive but very scale and adjustable for peak rpm.

(in reply to RCV Engines)
       Post #: 5

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