[agirard7a]

I had read in an earlier post that a 9a
pilot had done some glide testing with a shut down
engine. Apparently the glide speed with
the least amount of decent per min. Was 70 mph
at a sink rate of 400 feet per min.

Am I correct in calculating: 70/60min. =
1.166 miles per min x 5,280 ft/mile=6160 ft per min
divided by 400 ft/min = 15.4 ??

Is 15.4 to 1 glide ratio correct or in a safe ball park
for a 9a? Seems pretty high? Obviously many factors
are involved ie. Weight, altitude, pressure, etc.

Seems that by default 10/1 ratio as in C172. Seems to be used.

Does anyone have an accurate glide ratio for a 9a,
Say at max weight?

 

[Mike S]

Apparently the glide speed with
the least amount of decent per min. was 70 mph
at a sink rate of 400 feet per min.

Lowest sink rate per minute is not always the best way to look at it.

Lowest altitude lost for a given forward distance gained is pretty important.

This is one of those things glider pilots learn

 

[rv9av8tr]

For best glide in the -9A I use around 80mph.

 

[alpinelakespilot2000]

See the Cafe Foundation's report on the 9a. It's values are likely a lot more accurate than most of us can come up with. http://cafefoundation.org/v2/pdf_cafe_apr/rv-9a.pdf

 

[Sunriver Ken]

Denied Access

I tried the link to CAFE but was denied access. I wonder how it new me? Site manager must have been the pilot in the C-172 I passed last weekend. Poor sport.

 

[N941WR]

I tried the link to CAFE but was denied access. I wonder how it new me? Site manager must have been the pilot in the C-172 I passed last weekend. Poor sport.

Try this link and scroll down to the RV-9A.

 

[agirard7a]

thanks

Thank you for the replies.

The Cafe report was excellent!

 

[John R. Graham]

Heh. No RV-7 report.

- John