Commander-List Digest Archive

Sat 07/16/11


Total Messages Posted: 3



Today's Message Index:
----------------------
 
     1. 08:53 PM - Re: Re: Considering a 500S.... (William J Hamilton)
     2. 09:06 PM - Re: Re: Considering a 500S.... (cybersuperstore)
     3. 09:27 PM - Re: Considering a 500S.... (stratobee)
 
 
 


Message 1


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    Time: 08:53:52 PM PST US
    From: "William J Hamilton" <wjrhamilton@optusnet.com.au>
    Subject: Re: Considering a 500S....
    Adam, Have a good look into your performance figures and engine/prop. numbers and try low RPM and "high boost", it will make quite an improvement. Better still, fit GAMIjectors and a decent CHT/EGT system and run lean of peak, really save some fuel for the same TAS. Cheers, Bill Hamilton From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Moe Mills Sent: Friday, July 15, 2011 10:48 AM Subject: RE: Commander-List: Re: Considering a 500S.... Hi Adam, Very interesting. Just goes to show that you have to more or less square the power (and fuel burn) to increase the speed of basically the same airframe. Last week end I flew to Mena, AR from Farmington, NM. It appears that you get about 4.8 NM per gallon, whereas, I get only about 3.3 NM per gallon, crusing at about 180 Kts. About 40% difference in fuel burn to get there. The best price I could find was in Borger, TX, $ 5.22 per gallon, literally next to the Phillips Refinery. Hope you make it to Michigan with your bird. Best regards, Moe > Subject: Commander-List: Re: Considering a 500S.... > From: adam@adamfrisch.com > Date: Fri, 1 Jul 2011 12:49:30 -0700 > To: commander-list@matronics.com > > > Moe, I've just finished a 17hr tour of the north west - my first real flying on my own - so have some fresh numbers. My fuel burn was around 29gph when I stayed low, but can be forced down to 23-25gph up high. It's a little tricky to gage as the tanks transfer fuel and most FBO guys don't have the time to spend 15 minutes refuelling them. It's easier when you can do it yourself, but even I sometimes had to give up on those last gallons. > > The above numbers are at 20-22" and 2500-2600 rpm, so pretty throttled back. She showed around 135-140kts here, so not bad considering. I know Bonanzas that burn that much! The posh FBO's always charge an arm and a leg, but I found Avgas for around $5.20/gal on this trip and according to my little Foreflight software, there were out-of-the-way strips with prices as low as $4.70. I'll try to hit those next time. > > Also, as a friend once put it - any airplane will be cheaper than a coke habit! :D > > -------- > Adam > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=344618#344618 > > > > >====================== &g=================== > > >


    Message 2


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    Time: 09:06:53 PM PST US
    From: "cybersuperstore" <nico@cybersuperstore.com>
    Subject: Re: Considering a 500S....
    Low RPM and high boost makes good (common) sense, too. An internal combustion engine is nothing more than an air pump. The higher the RPM the more air it pumps. The air is loaded with a certain percentage of fuel and the more air one pumps the more fuel goes with it. Lower the RPM and the amount of fuel carried through the engine is also reduced. Increase the manifold pressure and the resident fuel is burned more effectively yielding energy comparable to the higher RPM settings. Perhaps too simple. _____ From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of William J Hamilton Sent: Saturday, July 16, 2011 8:51 PM Subject: RE: Commander-List: Re: Considering a 500S.... Adam, Have a good look into your performance figures and engine/prop. numbers and try low RPM and "high boost", it will make quite an improvement. Better still, fit GAMIjectors and a decent CHT/EGT system and run lean of peak, really save some fuel for the same TAS. Cheers, Bill Hamilton From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Moe Mills Sent: Friday, July 15, 2011 10:48 AM Subject: RE: Commander-List: Re: Considering a 500S.... Hi Adam, Very interesting. Just goes to show that you have to more or less square the power (and fuel burn) to increase the speed of basically the same airframe. Last week end I flew to Mena, AR from Farmington, NM. It appears that you get about 4.8 NM per gallon, whereas, I get only about 3.3 NM per gallon, crusing at about 180 Kts. About 40% difference in fuel burn to get there. The best price I could find was in Borger, TX, $ 5.22 per gallon, literally next to the Phillips Refinery. Hope you make it to Michigan with your bird. Best regards, Moe > Subject: Commander-List: Re: Considering a 500S.... > From: adam@adamfrisch.com > Date: Fri, 1 Jul 2011 12:49:30 -0700 > To: commander-list@matronics.com > > > Moe, I've just finished a 17hr tour of the north west - my first real flying on my own - so have some fresh numbers. My fuel burn was around 29gph when I stayed low, but can be forced down to 23-25gph up high. It's a little tricky to gage as the tanks transfer fuel and most FBO guys don't have the time to spend 15 minutes refuelling them. It's easier when you can do it yourself, but even I sometimes had to give up on those last gallons. > > The above numbers are at 20-22" and 2500-2600 rpm, so pretty throttled back. She showed around 135-140kts here, so not bad considering. I know Bonanzas that burn that much! The posh FBO's always charge an arm and a leg, but I found Avgas for around $5.20/gal on this trip and according to my little Foreflight software, there were out-of-the-way strips with prices as low as $4.70. I'll try to hit those next time. > > Also, as a friend once put it - any airplane will be cheaper than a coke habit! :D > > -------- > Adam > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=344618#344618 > > > > >====================== &g=================== > > > http://www.matronics.com/Navigator?Commander-List http://forums.matronics.com http://www.matronics.com/contribution


    Message 3


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    Time: 09:27:49 PM PST US
    Subject: Re: Considering a 500S....
    From: "stratobee" <adam@adamfrisch.com>
    Hi. I can't lower the RPM any more as 2500rpm is as low as the green arc goes. But I could run her at higher MP. Would would the benefits be? -------- Adam Read this topic online here: http://forums.matronics.com/viewtopic.php?p=346739#346739




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