The Shipyard ( Dry Dock ): Builds & Questions > Hovercraft
1/12 SRN6
Klunk:
hi tom...........i have a couple of hovercraft. We found out a couple years ago that you can play on the ice on the lake with them, but DO NOT STOP! the skirt freezes to the ice very quickly meaning it has to rescued somehow! other than that enjoy learning turn and skid sideways alot. On my fusion 400 i set her up so she turns in her own length, makes for a good show with the public
Subculture:
No experience with hovercraft, but plenty with aero props. Have you balanced the props. If not I would, because that can eliminate a lot of vibration.
Sub driver:
Hi Tom.
Thought it was that sort of size...i would be careful withit thats a lot of load for an 1800 kv...
If you read the reviews of that motor they all use two bladed props up to 8" diameter....more blades and size does not mean more thrust...its all about efficiency of the motor and it being able to spin up to its max rpm about 80% ( you can never get 100% efficiency).
I was also going to mention balancing the prop and also it appears to be an ic prop big boss on it...you will gwt more thrust and running time with an electric prop...
Regars sub.
TomHugill:
Hey sub,
Here's the prop I'm using:
http://www.apcprop.com/product_p/lp409060.htm
I'm struggling to find a smaller 4 bladed one, if you've any ideas though they would be appreciated.
I didn't realise there was a difference between electric and ic props.
Andy I've ordered a prop balancer, I've never done it before so wish me luck!
Sub driver:
Hi Tom.
Yep there is a huge diff in ic and electric props the blade is a different shape and a smaller thinner boss the ic ones are that thick to allow for the thump of the explosion in th cylinder where the shock is transmitted through..
An electric motor has to overrcome the inertia of that big boss to start spinning up the prop..
You can get a 6x3 four bladed prop. from Gliders made by Graupner..or flying models in Leeds for info they are left handers (pusher props ) but just reverse two of the brushless motor connections to reverse it.
Also APC and Gemfan do electric props they have an E nxt to the size ebossed on them..if i can i will post a pic of an electric prop nxt to an ic one and you can see the difference its very noticable.
A 7x5 electric two bladed prop is very powerful on a 2200 kv motor on 11.1 volts
Regards Sub.
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