---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Wed 04/17/13: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:12 AM - Re: mounting hinges/Email Mechanics ;-) (Thom Riddle) 2. 04:28 AM - Re: Re: mounting hinges/Email Mechanics ;-) (John Hauck) 3. 04:58 AM - Re: Re: mounting hinges/Email Mechanics ;-) (John Hauck) 4. 11:47 AM - Re: Re: mounting hinges/Email Mechanics ;-) (Charlie England) 5. 12:13 PM - Re: Re: mounting hinges/Email Mechanics ;-) (John Hauck) 6. 12:34 PM - Re: Re: mounting hinges/Email Mechanics ;-) (Charlie E) 7. 06:34 PM - Re: Re: mounting hinges/Email Mechanics ;-) (John Hauck) ________________________________ Message 1 _____________________________________ Time: 04:12:12 AM PST US Subject: Kolb-List: Re: mounting hinges/Email Mechanics ;-) From: "Thom Riddle" .... Surprisingly, I burned 5.0 gph at 5,200 rpm at 10,000 feet. At low altitudes and 5,200 rpm, fuel burn is 5.5 gph. .... Should not be a surprise because at 10,000 feet 5200 rpm makes less power than at 4,000 feet due to less dense air. Less power means less fuel consumption. Don't mean to split hairs, just asking: Did you really mean you flew at 10,000 feet east bound against west bound IFR traffic, or perhaps you meant 9,500'? -------- Thom Riddle Buffalo, NY (9G0) Kolb Slingshot SS-021 no engine FOR SALE Diamond Katana DA20-A1 Rotax 912 F3 Don't worry about old age... it doesn't last very long. - Anonymous Read this topic online here: http://forums.matronics.com/viewtopic.php?p=398787#398787 ________________________________ Message 2 _____________________________________ Time: 04:28:09 AM PST US From: "John Hauck" Subject: RE: Kolb-List: Re: mounting hinges/Email Mechanics ;-) Nice. What was your IAS? Richard P/Kolbers: Averaged about 75 to 80. john h mkIII Titus, Alabama ________________________________ Message 3 _____________________________________ Time: 04:58:23 AM PST US From: "John Hauck" Subject: RE: Kolb-List: Re: mounting hinges/Email Mechanics ;-) Should not be a surprise because at 10,000 feet 5200 rpm makes less power than at 4,000 feet due to less dense air. Less power means less fuel consumption. Thom Riddle Thom R/Kolbers: Yes, I was surprised. Up until this flight my 912ULS burned 5.5 gph at 5,200 rpm no matter what altitude I flew. When I refueled at Cross City, FL, after 4.0 hours, it took 20.1 gals. Hope it will keep on doing that. john h mkIII Titus, Alabama ________________________________ Message 4 _____________________________________ Time: 11:47:02 AM PST US From: Charlie England Subject: Re: Kolb-List: Re: mounting hinges/Email Mechanics ;-) On 04/17/2013 06:58 AM, John Hauck wrote: > > > > Should not be a surprise because at 10,000 feet 5200 rpm makes less power > than at 4,000 feet due to less dense air. Less power means less fuel > consumption. > > Thom Riddle > > > > Thom R/Kolbers: > > Yes, I was surprised. Up until this flight my 912ULS burned 5.5 gph at 5,200 > rpm no matter what altitude I flew. > > When I refueled at Cross City, FL, after 4.0 hours, it took 20.1 gals. Hope > it will keep on doing that. > > john h > mkIII > Titus, Alabama > Does your 912 have a method to manually lean the mixture? If not, you could probably do even better at altitude if you added that. As I'm sure you know (but other, UL-only participants might not), not only do you make less power up there, but the drag is quite a bit less, too, meaning significantly lower power is required for the same speed. Charlie ________________________________ Message 5 _____________________________________ Time: 12:13:25 PM PST US From: "John Hauck" Subject: RE: Kolb-List: Re: mounting hinges/Email Mechanics ;-) Does your 912 have a method to manually lean the mixture? Charlie 912 Bing carbs are altitude and temperature compensating. john h mkIII Titus, Alabama ________________________________ Message 6 _____________________________________ Time: 12:34:15 PM PST US Subject: Re: Kolb-List: Re: mounting hinges/Email Mechanics ;-) From: Charlie E Yes, but it's doubtful they can manage the extra leaning that's possible at lower power settings. Sent from my iPhone On Apr 17, 2013, at 2:13 PM, "John Hauck" wrote: > > > > Does your 912 have a method to manually lean the mixture? Charlie > > > > > 912 Bing carbs are altitude and temperature compensating. > > john h > mkIII > Titus, Alabama > > > > > > ________________________________ Message 7 _____________________________________ Time: 06:34:01 PM PST US From: "John Hauck" Subject: RE: Kolb-List: Re: mounting hinges/Email Mechanics ;-) Yes, but it's doubtful they can manage the extra leaning that's possible at lower power settings. Charlie E/Kolbers: The Bings lean as much as I want them too. The 912 is still climbing at 14,500 feet. John Williamson was still climbing at 15,000 feet. Midrange is tuned right next to too lean on the 80 and 100 horse 912. I experienced a too lean condition on my first flight to Alaska in 1994, but did not have the experience with the engine, was brand new when I departed Alabama, to properly diagnose what was going on. A few months after returning from Alaska, when the weather cooled in Alabama, I discovered the problem, raised the fuel needles a notch, and cured my problem. Would have saved me a bunch of grief in Alaska if I could have figured it out. The guys at ROTAX couldn't figure it out either. john h mkIII Titus, Alabama ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message kolb-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Kolb-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/kolb-list Browse Digests http://www.matronics.com/digest/kolb-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.