New prop for cub

[stryker08]

Hey guys, I just wanted to tell you guys about a fun mod I did on my cub. I have upgraded to a park 480 and did all the common mods for the cub but I was bored and had a spare 3 blade prop for my corsair laying around. I had to machine a spacer because the corsair prop has a bigger hole than the master airscrew i was using. I flew it yesterday and MAN what a difference it made. The cub with a 1500 lipo with go vertical as high as you dare to take it. I flew 22 minutes on one battery by going as high as I could and the just gliding large circles with the motor at very low rpm. The cub at wide open throttle is much faster than the Corsair. It also on take off rolls about 3 feet and its in the air. I coudlnt believe the difference it made.

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[stryker08]

here is a side view of the ole cub

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[Silverback]

what size prop is that?

Is that paint or covering on the fuselage? Looks good, I like the racer's tape details ;-)

[scubajohnny37]

cool thanks for the info!

[hawkeye20]

looking good one question I have how do you like the corsair I been thinking on getting one.

[ml8853]

Interested in how you did this. I've been wanting to put a 3 blade on it since I got it with the 480.

[jb cub]

Is this a 480 factory brushed motor or a 480 bushless. I like the look , is it still ok at low speed scale flying? Sorry new to this and for now slow is safer for me. lol

[flydiver]

You folks need to be careful with statement like the one started this thread. The term 'park 480' is only semi-useful. FAR FAR more important is WHAT EXACT 'park 480' (brand, model) AND KV. There are a LOT of park 480 motors and they will take different props. You could use anything from a 6x3 to a 12x8 on a motor with that size designation.
HURC does a GREAT job with specifying props to go with motors. Here's a number of '480'. Check the different ones, look at the weight, KV, and amp rating. Then notice the props he recommends for the different motors and the different plane applications. As you see, it can vary a lot.
www.headsuphobby.com/480-15-Class_c254.htm

Electric motors are constant speed devices. They function best with a narrow range of props. Too small > not much thrust. Too big > overload and burn out the motor (or ESC). People do it ALL the time. Over propping motors is one of the most common errors in the sport, trying to think you can get more power with only a prop change. It is just not that simple.

3-blade props may look cool but are actually less efficient than 2-blade. Each blade is creating turbulence for the following blade Yes, FOR THE SAME SIZE, you may get more power, as you have more blades working. But in general if you switch from 2-blade to 3 blade you should go down a size or you are pushing the motor if it was propped correctly previously. 3 and 4 blades are primarily used to get appropriate power from planes lacking ground clearance since they SHOULD be shorter.

As you get into the sport you'll here again and again....and yet again, 'get a Wattmeter' [http://www.rcgroups.com/forums/showthread.php?t=311574]. It's a device you hook up to the battery to see how hard the power plant is pulling. You can see exactly what changing the prop does. Without one you are working in the dark unless you stay specifically with recommendations from folks who KNOW what they are doing. That's just one thing that makes HURC so valuable.