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Hand Crank Pulley System

1 I can't figure out how to open my airplane Schweiss bifold with a crank. Where do I crank it at? Do you sell cranks? I have the door but no crank and the power was out the other day. Please advise. Email or call me on cell. thanks, Dave

2 I have a 42 foot strap lift Schweiss door. Explain the cost and installation of a hand crank emergency door open option, along with upgrading to the automatic latch strap system. Thanks Paul Dubrow.

3 I have a 42 foot strap lift Schweiss door. Explain the cost and installation of a hand crank emergency door open option, along with upgrading to the automatic latch strap system.