View Full Version : tall tail
does it matter it when you make a tall tail. does the hs have to be center of the prop or can it be hi or low of center by say + or - 2" or 3 " inches matter??? thanks ben
03-06-2005, 08:32 PM
I would think it would be okay not centered but would be best if in the center. Why?
03-07-2005, 12:19 PM
My HS is not exactly centered and I get very stable flying.
I say, as long as the prop wash goes easily through, it's not important to have it exactly in the middle of the spinner.
Even low HS will give even results as long as it's large enough to be efficient.
Have a look how mine is...
ron when i built my tail i had a 62 inch prop im going to a 68 in prop i have to raise the motor to do it hence the tail problem either the hs will be 3inches off center or i must block up the tail , charlie thanks for the reply
jeeezzzzes no one else has any ideas on this???
03-09-2005, 04:29 AM
Ben it won't matter, The Horiz mounted on the keel-to the top of the tall tail should be fine,
I sure wouldn't make spacers to raise the bottom mount, I would imagine if you are within 12" either way from the center of the prop, you wouldn't notice any difference.
03-10-2005, 01:09 AM
Mine was 4" above centre.
Now in the centre. Absolutely no noticeable difference
03-10-2005, 01:35 AM
The only thing I could think of if it wasn't centered would be that you wont get full 'counter torque effect'.
Above would be better if anything coz of the cleaner airflow, but I dout you'd notice any difference.
Mine on the RAF is bout 3" below, but it's still very effective.
03-11-2005, 09:53 AM
The HS helps to eliminate the torque roll effect. It will do this best if it's centered. If centered, it will do its anti-torque job WITHOUT adding a yawing tendency. If it's not centered, it will still help counter the roll, but then it will contribute to a yawing tendency, just as a non-centered Bensen rudder would. The yaw effect will likely be small but should be checked for with some careful feet-off testing.
IOW, center it if you can.
wow thanks everyone for the help now i have something to think and ponder about
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