Dave Butler wrote:
John Clonts wrote:

snip

Later I thought that maybe the tower didn't realize I was IFR when he
cleared me for takeoff, and that fouled something up with departure.

snip

This is an interesting thread. I'm based at a class C, RDU,
Raleigh-Durham, NC, and I've never had that happen, and I've never
informed tower that I was IFR. Never heard anyone else do it either.


It's not necessary at a class C or B tower, those facilities are the IFR
facility for releasing departures. It is a nice thing to do at class d
towers as they have to get a release from the IFR facility.