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11-15-2011, 08:21 PM
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Join Date: Apr 2011
Location: Linden, TN
Posts: 79
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Lower nose --- glide farther!
"When flying slower than L/Dmax, raising the nose will eventually lower the aircraft."
Dave's last statement needs to be burned into the brain of every pilot. In an approach at below the best glide speed, to glide farther you have to lower the nose. Totally non-intuitive!
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11-16-2011, 05:09 AM
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Join Date: Mar 2008
Location: Texas
Posts: 1,378
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Quote:
Originally Posted by AlanTN
Thanks, Larry. Do you have any idea what your RPM was? It is interesting that Peter used 3.8 gph and you only used 3.2 gph. It must be those rivets that you filled in! :-)
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Actually Alan...since Larry lives in corn country, he is allowed to use fuel without ethanol (go figure) while those of us that live in civilization are forced to burn corn "squeezins". There ya go!
Pete
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11-16-2011, 06:24 AM
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Join Date: Feb 2005
Location: Chesterfield, Missouri
Posts: 4,514
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Quote:
Originally Posted by Geico266
I went flying tonight and set the throttle to 97 mph. Knots are for ships.
Fuel burn was 3.2 gph.
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Hip-hip-hooray, finally someone did it and the question is answered. 
__________________
RV-12 Build Helper
RV-7A...Sold #70374
The RV-8...Sold #83261
I'm in, dues paid 2019 This place is worth it!
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11-16-2011, 07:36 AM
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Join Date: Apr 2008
Location: Riley TWP MI
Posts: 3,070
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Quote:
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Actually Alan...since Larry lives in corn country, he is allowed to use fuel without ethanol (go figure) while those of us that live in civilization are forced to burn corn "squeezins". There ya go!
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Some builders have been known to drink corn "squeezins" 
Joe Gores
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11-16-2011, 07:47 AM
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Join Date: Jun 2007
Location: Perth, Scotland
Posts: 494
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600
So 19.8 galls divided by 3.2 multiplied by 97 mph gives 600 statute miles as the absolute range.
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11-16-2011, 12:21 PM
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Join Date: Apr 2011
Location: Linden, TN
Posts: 79
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Here in Tennessee we can also got non-ethanol gasoline. One source I have says that E10 has 97% of the energy that gasoline has. So that would only account for about 0.1 gallon per hour difference.
Actually if Larry burns 3.2 gallons per hour at 97 mph indicated, that would be about 112 mph TAS at 7500. So 3.2 gallons will get you about 693 miles.
What is your secret, Larry?
Last edited by AlanTN : 11-16-2011 at 12:27 PM.
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11-16-2011, 12:46 PM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by Mich48041
Some builders have been known to drink corn "squeezins" 
Joe Gores
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And the problem is ????

__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
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11-16-2011, 12:48 PM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by gblwy
So 19.8 galls divided by 3.2 multiplied by 97 mph gives 600 statute miles as the absolute range.
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Wait a minute. If you climb while flying (according to your calculations) you could get an extra 20-40 miles of glide at 13 to 1! My weak attempt at humor is meant to say you better calculate a fuel reserve. 
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
Last edited by Geico266 : 11-16-2011 at 12:51 PM.
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11-16-2011, 12:49 PM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by AlanTN
Here in Tennessee we can also got non-ethanol gasoline. One source I have says that E10 has 97% of the energy that gasoline has. So that would only account for about 0.1 gallon per hour difference.
Actually if Larry burns 3.2 gallons per hour at 97 mph indicated, that would be about 112 mph TAS at 7500. So 3.2 gallons will get you about 693 miles.
What is your secret, Larry?
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Tail winds. 
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
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11-16-2011, 12:54 PM
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Join Date: Feb 2005
Location: Huskerland, USA
Posts: 5,862
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Quote:
Originally Posted by AlanTN
Thanks, Larry. Do you have any idea what your RPM was? It is interesting that Peter used 3.8 gph and you only used 3.2 gph. It must be those rivets that you filled in! :-)
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RPM was 4260. I took a picture of it.
I would lean toward the 3.8 actually. I just sent my Dynon in and they may have recalibrate my K factor. I think it is fairly close, but I am not 100% sure until I do some verifying.
I would like to think it was superior flying skills. 
__________________
RV-7 : In the hangar
RV-10 : In the hangar
RV-12 : Built and sold
RV-44 : 4 place helicopter on order.
Last edited by Geico266 : 11-16-2011 at 12:56 PM.
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