I programmed a 7:1 glide ratio in the ForeFlight profile for 4SP. Yesterday, I got a wild hair and decided to see how close I could get.
I figured at 5 miles out and 3,500' agl, I should be able to make the numbers with a couple hundred feet to spare. So, at the end of a 2 hour fun flight, on a beautiful day, with landings at a couple of small airstrips out away from the hustle and bustle, the obligatory series of loops and rolls over my favorite hay field, and the approach end of a 2,700' X 40' runway calling to me, I pulled the throttle back and slowed to 80mph. I actually had about 800' to spare, and had to slip a bit to lose the extra altitude. But, I managed to put it exactly on the numbers, no problem.
I figure without a windmilling prop, I wouldn't have any altitude to spare. But, at least I know that "glide distance" ring on Foreflight is somewhat accurate. And, the "wing-tip" rule-of-thumb is on the conservative side. But, not by a whole lot. So, there ya go!...
I figured at 5 miles out and 3,500' agl, I should be able to make the numbers with a couple hundred feet to spare. So, at the end of a 2 hour fun flight, on a beautiful day, with landings at a couple of small airstrips out away from the hustle and bustle, the obligatory series of loops and rolls over my favorite hay field, and the approach end of a 2,700' X 40' runway calling to me, I pulled the throttle back and slowed to 80mph. I actually had about 800' to spare, and had to slip a bit to lose the extra altitude. But, I managed to put it exactly on the numbers, no problem.
I figure without a windmilling prop, I wouldn't have any altitude to spare. But, at least I know that "glide distance" ring on Foreflight is somewhat accurate. And, the "wing-tip" rule-of-thumb is on the conservative side. But, not by a whole lot. So, there ya go!...