---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Fri 07/25/08: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:58 AM - Re: Weight and Balance? (Dave Bigelow) 2. 01:16 PM - Re: Re: Just a rare good day in Ohio (gary aman) 3. 03:38 PM - Re: Generac test data..IE: Jimmys temps (Jimmy Young) 4. 05:04 PM - Need Flight Instruction (Sara Grassel) 5. 06:18 PM - Re: 2008 Father's Day Gathering at the Kolb Farm (WhiskeyVictor36@aol.com) 6. 06:39 PM - Re: Just a rare good day in Ohio (N111KX (Kip)) 7. 07:43 PM - Re: Generac test data..IE: Jimmys temps (Don G) ________________________________ Message 1 _____________________________________ Time: 10:58:55 AM PST US Subject: Kolb-List: Re: Weight and Balance? From: "Dave Bigelow" The 25% to 35% range for CG is pretty standard for conventional aircraft with tailfeathers rather than a flying wing or canard. If your CG falls within that range and you have a pitch trim problem, the solution is not to to change CG. You should add a trim tab to the elevator, a bungee or spring to the stick, or a more radical solution - change the angle of incidence of the tail. A CG aft of the recommended rear llimit is dangerous. The aircraft may feel and handle just great, but in certain situations like a deep stall or spin, may not be recoverable. There's nothing wrong with flying at or near the rear limit. Sailplane pilots do it all the time to optimize handling and reduce drag. If you do a good weight and balance with the aircraft in the proper pitch attitude with good accurate scales, and the CG is aft of the limit, you should add ballast to keep it within the llimit. This stuff is basic and is applicable to all conventional aircraft. Homer didn't design aircraft that beat the rules. If his planes don't exhibit dangerous flight charactoristics with the CG slightly behind the limit, that means he probably was being conservative when he published the limits. Somewhere back of his published limit is "never never" land, and you don't want to be the person who finds out exactly where that is unless you are conducting a flight test program with a drag chute, etc to be able to recover from a deep stall or flat spin. If Dennis Souder (did most of the flight testing at Old Kolb) is reading this thread, it would be good to get his input. -------- Dave Bigelow Kamuela, Hawaii FS2, HKS 700E Read this topic online here: http://forums.matronics.com/viewtopic.php?p=194919#194919 ________________________________ Message 2 _____________________________________ Time: 01:16:08 PM PST US From: gary aman Subject: Re: Kolb-List: Re: Just a rare good day in Ohio The week end will be garbage here ,so we took friday off and went to breakfast and then stopped for a cone on the way home.What follows two days of rain in Ohio? Monday. ----- Original Message ---- From: Dave Bigelow Sent: Friday, July 25, 2008 1:56:09 PM Subject: Kolb-List: Re: Weight and Balance? The 25% to 35% range for CG is pretty standard for conventional aircraft with tailfeathers rather than a flying wing or canard. If your CG falls within that range and you have a pitch trim problem, the solution is not to to change CG. You should add a trim tab to the elevator, a bungee or spring to the stick, or a more radical solution - change the angle of incidence of the tail. A CG aft of the recommended rear llimit is dangerous. The aircraft may feel and handle just great, but in certain situations like a deep stall or spin, may not be recoverable. There's nothing wrong with flying at or near the rear limit. Sailplane pilots do it all the time to optimize handling and reduce drag. If you do a good weight and balance with the aircraft in the proper pitch attitude with good accurate scales, and the CG is aft of the limit, you should add ballast to keep it within the llimit. This stuff is basic and is applicable to all conventional aircraft. Homer didn't design aircraft that beat the rules. If his planes don't exhibit dangerous flight charactoristics with the CG slightly behind the limit, that means he probably was being conservative when he published the limits. Somewhere back of his published limit is "never never" land, and you don't want to be the person who finds out exactly where that is unless you are conducting a flight test program with a drag chute, etc to be able to recover from a deep stall or flat spin. If Dennis Souder (did most of the flight testing at Old Kolb) is reading this thread, it would be good to get his input. -------- Dave Bigelow Kamuela, Hawaii FS2, HKS 700E Read this topic online here: http://forums.matronics.com/viewtopic.php?p=194919#194919 ________________________________ Message 3 _____________________________________ Time: 03:38:47 PM PST US From: Jimmy Young Subject: Kolb-List: Re: Generac test data..IE: Jimmys temps Don, Thanks for the tip, makes sense. I put some foil tape over the oil cooler and now have the oil hitting 215-220 at full throttle. Jimmy Y FS II Generac Houston TX ________________________________ Message 4 _____________________________________ Time: 05:04:32 PM PST US From: Sara Grassel Subject: Kolb-List: Need Flight Instruction Wanted: Instruction in flying a Kolb in Southern California. Please call at Martin Grassel at (818) 249-5573 or email at sgrassel@earthlink.net ________________________________ Message 5 _____________________________________ Time: 06:18:04 PM PST US From: WhiskeyVictor36@aol.com Subject: Re: Kolb-List: 2008 Father's Day Gathering at the Kolb Farm In a message dated 7/20/2008 10:26:17 A.M. Eastern Daylight Time, gtalexander@att.net writes: ....At the 2004 gathering at the Kolb farm, Bill told the group that when he was buying his kit from Kolb, someone said that he didn't look like a flyer. A builder maybe, but not a flyer. Looks can be deceiving. How many PIC hours do you have now, Bill? Hi George, That someone was Dave Starbuck when he was working at old Kolb. I had stopped in one day to look over the FireStar and he was the one that convinced me it was easy to build. I don't recall how much time passed, but on June 30, 1989 I stopped in again and purchased a kit from Homer. My pilot flight log shows 535 hours of total time. Of that, 492 hrs were in my Kolb and 43 hrs were in various other craft, mostly in a PA18 90hp Super Cub, which is what I trained and soloed in, but also flew a Taylorcraft BC12D, Cessna 140, J3 Cub, Cessna 150 and an Aeronca Champ. Started flying April 5, 1958 through Feb 1, 1967. Then a big gap of almost 27 years of no flying until I got the Kolb going. First flight in my Kolb was June 18, 1994. Never got a PVT license, but do have the USUA UL pilot license. Now aren't you sorry you asked? Bill Varnes Original Kolb FireStar Audubon NJ Do Not Archive **************Get fantasy football with free live scoring. Sign up for FanHouse Fantasy Football today. (http://www.fanhouse.com/fantasyaffair?ncid=aolspr00050000000020) ________________________________ Message 6 _____________________________________ Time: 06:39:50 PM PST US Subject: Kolb-List: Re: Just a rare good day in Ohio From: "N111KX (Kip)" Looks like fun. Can you just pull up to the diner there...? -------- Kip Firestar II, N111KX Waiex, N111YX Quickie 1, N111QX Atlanta Read this topic online here: http://forums.matronics.com/viewtopic.php?p=194994#194994 ________________________________ Message 7 _____________________________________ Time: 07:43:03 PM PST US Subject: Kolb-List: Re: Generac test data..IE: Jimmys temps From: "Don G" Perfect!..... -------- Don G. Central Illinois Kitfox IV Speedster Luscombe 8A Read this topic online here: http://forums.matronics.com/viewtopic.php?p=195007#195007 ------------------------------------------------------------------------------------- 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.