Also, I forgot to mention, if you're testing out the Lofte/Norden type bombsights there's a trick to them. Don't try to track your target forever. They aren't designed for that. Only track your target about 3 or 4 degrees at the most. For instance, if you find the bombs release around 35 degrees at a given altitude, manually move the bombsight angle no farther than 38 or 39 degrees. As your sight moves over the target, enter it into auto mode and let it do its job. If you don't try to track your target forever, they're just as accurate as the OKPB-1 sights.
You can also "tweak" it a bit before you enter into auto mode. If the actual TAS is 2 or 3 kph HIGHER than what you entered as the bombsight velocity, you can move the bombsight altitude DOWN 10 or 20 meters in elevation for fine adjustment. The reverse is also true.
Note: The Betty uses this type of bombsight and its velocity factor is .046.
Bombs away!
