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utcminusfour said..YellowHelmet said..
Maybe it would be an idea to find out a formula, algorithm with all the necessary input and output data.
If not possible by formula, then by neural network, some AI.
Maybe some savant mathematical member can do this.
Input :
- Weight.
- Volume of the board, maybe also width.
- Size of the sail (camber or not).
- Span and surface of the front foil = aspect ratio (maybe thickness and volume).
- Maybe size of the stabilizer.
- Take off wind speed.
- Pumping : no - lazy - active
- Resulting cruising speed.
- Salt / fresh water (salinity)
- Other ?
All with sliders, all dynamically interacting, selecting what input(s) are to be changed for what output(s), for example asking for a take off wind speed of 10 knots by changing span / surface of the front foil for a given board size and fixed sail, or asking for the sail size for a fixed board and foil.
An app would be nice.
I think in commercial airliners there is a stall alarm when the steering wheel starts to shake. If this can be calculated for air foils, such should be possible for water foils.
This should also be possible for wingfoil and even windsurfing, but for windsurfing the window of possible changes by sail and board size to start planing is much more narrow than for foiling.
Dreaming about a wishbone with stall alarm that wakes me up when it's time to start pumping.
I think he's got a good point here. Why shouldn't we have a velocity prediction program for the entire package right? I mean there weren't even barely computers around and sailboat racing had every variable calculated in one place. Or even better how about a simulator! I've got some energy for that for sure. I don't have all the knowledge or data required, it's gotta be a community grassroots open source approach. Just planting that seed.
Maybe if we ask it nicely Boeing or Airbus could help us.
AI : Yes, payload weight is taken into account for airplane stick shaker activation. Stick shakers are triggered by the stall protection system, which calculates the critical Angle of Attack (AOA) based on total aircraft weight, including payload, fuel, and center of gravity, alongside airspeed and flap configuration.
Key details regarding payload and stick shakers:
Weight & Stall Speed: A higher payload increases the stall speed of the aircraft. As weight increases, a higher angle of attack (and thus higher lift) is required to maintain flight, meaning the stall warning (stick shaker) will activate at a higher airspeed compared to a lighter, less-loaded aircraft.
System Inputs: The stall protection system uses sensors (AOA vanes) to calculate margins, but the flight control computer constantly accounts for current gross weight to accurately predict when the aircraft is near a stall.
Safety Purpose: The system is designed to provide a "wake up" warning to the crew when the aircraft is approaching a critical angle of attack, typically 10-15 knots above the actual stall speed, regardless of how heavily the aircraft is loaded.
