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  #11  
Old 07-21-2013, 08:48 AM
HeliCooper HeliCooper is offline
 
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Good to see you John.
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  #12  
Old 07-21-2013, 03:42 PM
Rupester Rupester is offline
 
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Quote:
Originally Posted by Finley Atherton View Post
From my experience and from performance figures others have posted a 160 hp 9A with a Hartzell prop will burn about 6 to 6.5 g/h LOP at 150 kts (173 mph) at around 8,000 ft.
Running 40F LOP, my 160hp 9A with 3 blade Catto shows almost exactly the same numbers. FWIW.
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  #13  
Old 07-21-2013, 06:13 PM
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N941WR N941WR is offline
 
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Check with Lycoming, since it is one of their engines. Their site lists 11.1 GPH at 65% power. I can only imagine what 75% power will be.

The -9 is a well known item and Van's is known for listing real numbers for their aircraft.
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  #14  
Old 07-21-2013, 08:10 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
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Quote:
Originally Posted by HeliCooper View Post
Hello everyone,
I am looking into the 14 and 9 for a xc IFR machine and was wondering if anyone had any idea how much more the 14 will burn then the 9 at the same cruise speed. Assuming both are standard injected Lycomings.
At the same speed, they will be awfully close, with the -14 probably burning slightly more (perhaps 1 gph) due to differences in fuselage cross section and span loading.
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  #15  
Old 07-22-2013, 06:29 AM
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propsync propsync is offline
 
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If it helps, my 76 Cardinal RG with lycoming IO360 200hp engine burns

8000' std temp 22"/2300 65% 9.3gph
8000' std temp 22"/2400 69% 9.9gph
8000' std temp 22"/2500 72% 10.4gph
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  #16  
Old 07-23-2013, 08:26 AM
Tom Martin Tom Martin is offline
 
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Location: Ontario, Canada
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[quote]Originally Posted by Finley Atherton
From my experience and from performance figures others have posted a 160 hp 9A with a Hartzell prop will burn about 6 to 6.5 g/h LOP at 150 kts (173 mph) at around 8,000 ft.
/QUOTE]

I noted this number and took it as a bit of a challege

This morning I took my EVO rocket, (280 to 300HP?) up to 8000'PA to see what I could do at 150knots TAS.
It took a while to slow down but with the autopilot on level flight I was at

2000rpm, 14.5"MP burning 6.1 gph

It takes a certain amount of energy to push and aircraft through the air at 150 knots. Most RVs and rockets share a very similar profile, thus these results were not unexpected and I am sure that the RV14 will be about the same.
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