My new
EXTREMEAlloy 127mm Ramtec fan will produce 22lb thrust on 14 cells, fan weight is 1080 grams all up with motor cover ready to install. May be an option to consider, the fan is $499.00 complete with motor ready to install. It runs an HET 800-73 series inrunner, extremely powerful and very efficient. I saw 21lb thrust with old 5000mah packs, 145A, with new larger capacity battery setup 22lb+ will be easy.