Sometimes it can be a challenge finding something new and interesting to do while flying. Since I was taking another co-worker for a flight, I obviously couldn’t do anything too interesting, like using my GPS to measure the plane’s glide performance at different airspeeds.
Since a sightseeing flight was in order, and my passenger was new in town, I thought a big circle around Kitchener, Waterloo, Guelph, and Cambridge might be fun. Rather than plan this flight as a series of straight legs approximating a circle, I decided I’d try flying it by just maintaining a constant distance from the airport (using the GPS distance-to-waypoint readout).
We started with a straight out departure from runway 32 for 10 miles followed by a 90 degree right turn. At that point I tried to keep the distance pegged at 10 miles. There are two basic approaches to achieving this.
One approach involves just flying straight for a while. If the distance increases, turn right. If it decreases, turn left. (Reverse these if you’re flying counter-clockwise).
A more sophisticated way requires some additional information, namely the bearing to the airport and the current ground track. If you always keep the ground track 90 degrees more than the bearing, you’ll fly a clockwise circle. You can still drift off the circle due to accumulated error, so you still need to watch the distance reading too.
I tried the second way first, except I made the mistake of trying to use the VOR (our airport has a VOR beacon on the field). I either forgot, or never knew, that the VOR doesn’t work when the beacon is directly to the right or left. It constantly switches between TO and FROM, with the NAV flag bouncing in and out of view. Now I know, and a practical experience like this one will ensure that I remember.
I completed the flight using the first method, and of course, I cross checked against the chart the whole time too (the VOR rose on the chart is approximately 10 miles in radius). After about 3/4 of a circle, I called the tower, and turned back towards the center to return to the field, followed by an uneventful landing.
Date: 2007-Apr-24
Aircraft: C-GCVY, DA20-A1
Passenger: Sarah S.
Route: CYKF - Local Area - CYKF
Flight Time: 1.1h
Takeoffs and Landings: 1