Some DAR's require that you have a valve and can reach
it with your seat belt on. I assume an electric one, as Ed mentioned
would also do. JohnD
The control valve could be outside the cockpit and operated by a dash
mounted pointer with a long aluminum tube shaft through the firewall to the
valve.
LYnn E. Hanover
Properly implemented (that's always the rub) this remote mechanical
scheme can work. An example of how not to do it was in John
Denver's plane (built by someone else). It was a main factor in getting
him killed.
The in / out of cockpit fuel plumbing is an age-old argument but
personally I like as much of the fuel system in the cockpit as
possible. A leak there causes an unpleasant smell. A leak
under the cowl is very likely an in-flight fire.
The right choice? All depends on how it's implemented.
Tracy