?   http://godolloairport.hu/calc/strc_eng/index.htm   ?

 ?   https://spencergoesflying.net/hosted/static_thrust/   ?

http://web.archive.org/web/20201112000918/http://godolloairport.hu/calc/strc_eng/index.htm

https://www.poweredparagliders.com.au/Calculators/Static_Thrust_Calculator.htm