Typhoon Belt drive models include a heavy duty spring helot tensions to reduce bounce at sterile and provide uniform loading to increase the life of the belt and maintain high efficiency. ©0.10" SP CFM/ Slze|Ph Spud CFM Drive| Prop 24" [1]1 | 44311 13,5 VNS305850 (30" 684! £2.2 VNS36D 7.748! 14.1 VNS365 8085 512.6 | Belt [4-Gov VNS3651 36" 1] 1 |43,3717 £1.8 | Bert [4-Iv VNS4251 1 |14,334: 138 | Belt [3-Iv VNS4252 4271 2 |14,157; 186 | Belt [3-Iv 4,545 87 VNS505 507 1| 1 | 48,275 6.