Setting, adjusting "delta V" on our underwater flying machines can be daunting.
Why?
As a beginner it is almost impossible to tell if a certain set up is well trimmed or not.
One simply lacks the well tuned flying trim feeling.
And to make matters worse, if stupidly learning with straps (god forbid front and back) and they are not in the correct fore aft position, then even tiny changes of stab A o A will change where balanced foot weight stance should be.
But it can be very hard for a new pilot to strapless water start (worse in choppy H20) and then move both fore and aft foot placement as well as width to find what is a comfortable flying stance for you.
Once again why using a front foot hook only and mounted a couple cms forward of flying trim stance can REALLY aide a newbie to adjust by allowing it to help a lot with water start while allowing freedom of foot stance placement not to mention the crash SAFETY factor!
Cunundrum!
Also needs to be clearly pointed out that different wing profiles will give different up, down forces, therefore wings set at 0° with say
- clark y 9%.jpeg (4.56 KiB) Viewed 1092 times
as compaired to
will change your delta V a lot, board foot position, and then factor in the R wing, stab profile and A o A...
So although certain standard starting wing A o As can help for sure, they are just that, a starting point.
R H