David Megginson <[EMAIL PROTECTED]> said: > Jim Wilson writes: > > > What information that I am aware of would indicate an "RMI". > > Correct me if I'm wrong but these RMI units had a dial/card/rose > > attached to a gyro and thus operated like the gyro compass on the > > hsi. The large arrow was ADF and the small arrow pointed toward a > > VOR transmitter. But my understanding is VOR is post-WWII. Of > > course it is possible that the D/K series was fitted post WWII with > > these, but I have yet to find a picture of a cockpit not refitted > > with modern G/A that doesn't have this instrument. > > A double ADF indicator would make a fair bit of sense -- with > primitive equipment and no navigator, the pilot workload would be > fairly high, and two needles would help a lot for triangulating a > position (especially if the pilot would otherwise have to reach behind > the seat to change frequencies).
One thing I forgot to mention was that none of the pictures shows any sign of an index or tick mark on the bezel which would also suggest that the card is fixed. Perhaps the pilot is left to make the calculation, but there is that knob. So one theory is that maybe the big arrow is manually turned to the current heading (?). The radio is behind the seats, but I believe the tuner is either way down on the console panel behind the stick, or maybe in some cases on the right side wall. One I've seen only tunes to two frequencies, and one of those is voice, but could I supposed double as beacon. Note that what is currently modeled as a mag compass is really a DG (I need to fix that) and it is right next to the ADF at 4 o'clock (possibly for the convenience). Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
