Marty Davis
Well-Known Member
- Joined
- Sep 25, 2004
- Messages
- 2,445
We had a great discussion about the sponson offset on outriggers last year and I would like to offer some new information.
I have usually offset all of my riggers sponsons to the left (left side further from the tub than the right). On my .21 boat I use 1/2" offset.
I brought out an old 67 boat that had run very well in the past and started running it some. I took it to Charleston with good results.
Thing about this boat is that the sponsons are offset to the right by a little over 1/2".
The boat has ZERO torque into the course and runs totally neutral. AND the sponson spacing is fairly narrow. Wonder what effect making the spacing very wide, very narrow has on this torque effect.
I am not at all convinced that sponson offset is necessary to reduce the torque effect. I believe that the torque effect is because the turn fin, the prop sharpening, or some other thing is incorrect or not optimized.
Would be interested in John Finch and others response to these findings. John had most convinced that the offset was necessary. I am not at all sure that is the case. Give me some more information that will convince me.... Guess that the amount of variables in our hobby are so massive, that it is many times difficult to isolate the effect of one item and its contribution.
Marty Davis
I have usually offset all of my riggers sponsons to the left (left side further from the tub than the right). On my .21 boat I use 1/2" offset.
I brought out an old 67 boat that had run very well in the past and started running it some. I took it to Charleston with good results.
Thing about this boat is that the sponsons are offset to the right by a little over 1/2".
The boat has ZERO torque into the course and runs totally neutral. AND the sponson spacing is fairly narrow. Wonder what effect making the spacing very wide, very narrow has on this torque effect.
I am not at all convinced that sponson offset is necessary to reduce the torque effect. I believe that the torque effect is because the turn fin, the prop sharpening, or some other thing is incorrect or not optimized.
Would be interested in John Finch and others response to these findings. John had most convinced that the offset was necessary. I am not at all sure that is the case. Give me some more information that will convince me.... Guess that the amount of variables in our hobby are so massive, that it is many times difficult to isolate the effect of one item and its contribution.
Marty Davis
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