I'm playing around with a 15-size combat plane (J&C Hobbies Fun Bat).

Most fly this bird with a Magnum XL 15 on a 7x4 prop.

I'm running with an OS CV 15-A and an 8x4 prop.

Anyone out there doing something similar and could you give me an idea of an optimum prop size for this combination.

We all run 7x4 MAS props on the Mag and OS CV-A engines in A class around here. The Megatech is also a powerful engine in the .15 class, also with the 7x4.

I run the OS-.15CVA with only the MAS 7x4 prop. The 8x4 bigs it down too much. Put on the 7x4 and it comes alive with a vengeance.

Bill Davis
Manassas VA

i have a ssc plane with a 15 la engine running a master airscrew 8x4 prop making 17,400 rpm, and its relatively fast,
haha i like your avatar montague LMAO!

i have a ssc plane with a 15 la engine running a master airscrew 8x4 prop making 17,400 rpm, and its relatively fast,
haha i like your avatar montague LMAO! sorry for the repost

MAS makes 8 x 3's for SSC...try one

Well, I changed out the 8x4 for a 7x6 -- night and day difference.

In the past, to maintain the same speed level as the other pilots I was finding my fuel economy keeping me farely close to the 5-minute combat flight -- finished several heats at deadstick.

I clocked a test flight with the 7x6 prop, maintaining a much higher airspeed, and got 7.5 minutes off of the same 2oz tank that I used to barely get 6 minutes. At full throttle, most of the other planes flying Magnum XL .15s and OS LA .15s could not keep up with my 15 CV-A -- finally, this is what I invested $110.00 for.

Great looking Bat Jim.....I guess I need to get mine out and finish it soon.
Thanks Tiny Tim

Where do you find Funbat plans.....looks interesting.

Kevin

Do a search under JC Funbat.....they have a web site and to be honest they are pretty cheap for the fun......Try one out and I know you will like it. I have seen a few fly and had to have one. Just my 2 cents Tiny Tim

[] Careful what you wish for! Either the people you fly with will also get CVA's and your back even again or they will not be willing to pay the 200 or 300$ they need to for new engines and quit. Hard to fly combat by yourself! []

Exactly the reason SSC was created.

Actually, for every 1 minute of combat flying I do with this bird, I fly over 30 minutes sports flying with it. If I never flew another combat flight I would still be enjoying this airplane.

In actuality, my current combat experience/expertise is not even close to being able to take real advantage of this plane/engine combination. Combat to me, and the other pilots I fly against, is still 100% LUCK!!!!

http://www.jchobbies.com/catalog/power1.htm

J&C Hobbies JC00308 Fun-Bat .15 Combat ARF $26.95

They also have 6-pack specials, Magnum XL .15 bundle specials, and accessory packs (all pushrods and 2oz fuel tank).

NOTE: They have suspended their production on this airplane but still have a good stock supply. Who knows, if enough interest is generated they may restart their production.

BTW, I have no formal relationship with J&C Hobbies. I'm just one of their many happy customers. They are actually over 110 miles from my home and are my vendor of choice for WildCat Xtra Premium 15% fuel -- I and others in my club make several trips each year from West Virginia to Pittsburg to buy fuel by the case.

WOW! Good to see you again Jim! This is RED. I was just checking into getting a funbat and wanted to see what others had to say and there you were! Found a good flying field here in Jacksonville, FL. Say hi to all the guys for me.

Red