CMB 67 Fast in turns, slow in straight, Aeromarine Challenger omra  
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All Forums >> RC Boats >> RC Boats General Discussion >> CMB 67 Fast in turns, slow in straight, Aeromarine Challenger omra Page: [1]

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CMB 67 Fast in turns, slow in straight, Aeromarine Chal... - 8/31/2008 12:00:40 PM   
peterpan778491


 

Posts: 2
Joined: 1/6/2008
From: Hertfordshire, UNITED KINGDOM
Status: offline 		CAN ANYONE HELP !

I have a deep vee with cmb 67 hydro racing, drive is semi submerged, boat speeds up in turns and slows down a lot on the sraight, the only way i can get the rpm up is to make a turn ! Does anybody have any ideas ?



< Message edited by peterpan778491 -- 8/31/2008 12:02:51 PM >
       Post #: 1

RE: CMB 67 Fast in turns, slow in straight, Aeromarine... - 8/31/2008 2:02:48 PM   
John Palica


 

Posts: 1228
Joined: 5/22/2003
From: Vernon, CT, USA
Status: offline 		Sounds like the ride attitude of your boat needs adjustment. Adjust your strut angle to raise the rear of the strut. That will tend to lift the bow of the boat and get it free of the water. I picture your boat "plowing" when going straight. Make the adjustments in small increments until the boat is running free. The prop may also be a factor. To much prop will load the engine on the straights. In the turns the boat leans and the prop is lifted towards the surface where it can unload, allowing the engine to speed up and increase the boat speed. If the trim adjustments don't work, try a smaller prop.

_____________________________

John

(in reply to peterpan778491)
       Post #: 2

RE: CMB 67 Fast in turns, slow in straight, Aeromarine ... - 9/2/2008 1:55:51 AM   
traynumber1


 

Posts: 3
Joined: 9/2/2008
From: New Strawn, KS, USA
Status: offline 		Props to big causeing it to fall of pipe in the strats. Go one size smaller.

(in reply to peterpan778491)
       Post #: 3

RE: CMB 67 Fast in turns, slow in straight, Aeromarine... - 9/2/2008 2:00:26 AM   
traynumber1


 

Posts: 3
Joined: 9/2/2008
From: New Strawn, KS, USA
Status: offline 		Prop is to big causeing it to fall off pipe when going down the stright. GO ONE SIZE SMALLER

(in reply to traynumber1)
       Post #: 4

RE: CMB 67 Fast in turns, slow in straight, Aeromarine... - 9/2/2008 5:07:23 AM   
misshydro



Posts: 2260
Joined: 8/1/2006
From: stmarys, OH, USA
Status: offline 		to big of a prop go smaller.

(in reply to traynumber1)
       Post #: 5

RE: CMB 67 Fast in turns, slow in straight, Aeromarine ... - 9/5/2008 2:53:31 AM   
peterpan778491


 

Posts: 2
Joined: 1/6/2008
From: Hertfordshire, UNITED KINGDOM
Status: offline 		Many thanks i have the size down and am going to give it a try at the weekend.

(in reply to peterpan778491)
       Post #: 6

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