@contacttower
Not at 100ft high!
As said before the best glide speed changes with flapsetting! With Flaps40 on a cessna you would need to fly slower for best glide in comparison to flaps up.
You would therefore need to lower the nose to increase speed.
You are talking about a situation when you are at 600ft in a cessna.
Now just think this 100ft in my cessna is about 1000ft in a jet.