---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Thu 09/03/15: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:08 AM - Angle of engine (Theodore Cowan) 2. 07:55 AM - Re: Angle of engine (John Hauck) 3. 09:49 AM - Re: Aileron Gap Seals (Shadow94) 4. 11:08 AM - Re: Re: Aileron Gap Seals (John Hauck) ________________________________ Message 1 _____________________________________ Time: 03:08:41 AM PST US From: Theodore Cowan Subject: Kolb-List: Angle of engine To explain my comment on raising the rear of the engine on slingshots I offer this: They changed the angle of attack on the slingshot from the norm of 12 degrees AOA to 9 degrees. As you added speed to the kolbs the tail kept climbing up until it was almost tipping over in the air. It creates its own drag. You could change a few things and still never keep it level. However, the kolb is designed to stay level in flight throughout the speed cycle. Somehow they missed the fact the engine mounts were not in the proper line with the fuse. You MUST raise the rear of the engine to keep the prop more aligned to the flightline of the aircraft or the motor actually pushes the craft over onto its nose - in flight and on the ground. The slingshot is the only one to have this extreme problem. Without modification the engine looks as if it is falling backwards and the thrust pushes the craft over. I suppose there will be a doubting Thomas out there. The drag induced by this setup is extreme. I reversed the lord mounts so the rear were up and the front mounts were down and added a 3/8 inch shim (kolb supplied) on top of the mount in the rear. Spent many hours with my 582 and then again with the 912 correcting this flaw in the design of the SS. There is no bungie in the world that will straighten your flight as the cure I just mentioned. Trust me on this. I would be happy to discuss this off line with anyone. Email me and i will call you. If you have never flown a slingshot you will not understand this. The 'New kolb company' knew this. The short tail boom really makes it stand out. I almost never have to change el trim in flight up to 95 mph. Faster requires a little effort on the stick. Hope this helps anyone out there with a slingshot they are fighting with for trim. Ted cowan slingshot 900hrs 912ul zoom zoom By the way, 85 to 95 is normal cruse for this combination at abt 3.4 gph!!! Sent from my iPhone ________________________________ Message 2 _____________________________________ Time: 07:55:06 AM PST US From: "John Hauck" Subject: RE: Kolb-List: Angle of engine I didn't understand what you meant by "heavy stick". Thanks for the info. john h mkIII Wenatchee, WA -----Original Message----- From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of Theodore Cowan Sent: Thursday, September 03, 2015 3:08 AM Subject: Kolb-List: Angle of engine To explain my comment on raising the rear of the engine on slingshots I offer this: They changed the angle of attack on the slingshot from the norm of 12 degrees AOA to 9 degrees. As you added speed to the kolbs the tail kept climbing up until it was almost tipping over in the air. It creates its own drag. You could change a few things and still never keep it level. However, the kolb is designed to stay level in flight throughout the speed cycle. Somehow they missed the fact the engine mounts were not in the proper line with the fuse. You MUST raise the rear of the engine to keep the prop more aligned to the flightline of the aircraft or the motor actually pushes the craft over onto its nose - in flight and on the ground. The slingshot is the only one to have this extreme problem. Without modification the engine looks as if it is falling backwards and the thrust pushes the craft over. I suppose there will be a doubting Thomas out there. The drag induced by this se! tup is extreme. I reversed the lord mounts so the rear were up and the front mounts were down and added a 3/8 inch shim (kolb supplied) on top of the mount in the rear. Spent many hours with my 582 and then again with the 912 correcting this flaw in the design of the SS. There is no bungie in the world that will straighten your flight as the cure I just mentioned. Trust me on this. I would be happy to discuss this off line with anyone. Email me and i will call you. If you have never flown a slingshot you will not understand this. The 'New kolb company' knew this. The short tail boom really makes it stand out. I almost never have to change el trim in flight up to 95 mph. Faster requires a little effort on the stick. Hope this helps anyone out there with a slingshot they are fighting with for trim. Ted cowan slingshot 900hrs 912ul zoom zoom By the way, 85 to 95 is normal cruse for this combination at abt 3.4 gph!!! Sent from my iPhone = Photoshare, and much much more: = = = ________________________________ Message 3 _____________________________________ Time: 09:49:23 AM PST US Subject: Kolb-List: Re: Aileron Gap Seals From: "Shadow94" Richard, Thanks for the photos. I appears that the gap seals are attached to the bottom of both the wing and the aileron with a bit of slack to account for aileron movement. I assume the are constructed out of the same covering as the wing and aileron. thanks again for the input. -------- Mark Twinstar MKII Great Bend, PA Read this topic online here: http://forums.matronics.com/viewtopic.php?p=446739#446739 ________________________________ Message 4 _____________________________________ Time: 11:08:49 AM PST US From: "John Hauck" Subject: RE: Kolb-List: Re: Aileron Gap Seals Realize the post was addressed to Richard only. Hope it will be permissible to share a response. Unless I am badly mistaken, 3" finishing tape is used for the gap seals. The original Kolb Aircraft construction manuals have some very good information (tricks of the trade) for installing and finishing gap seals. I'm not at home or I would attach those instructions to this post. john h mkIII Wenatchee, WA -----Original Message----- From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of Shadow94 Sent: Thursday, September 03, 2015 9:49 AM Subject: Kolb-List: Re: Aileron Gap Seals Richard, Thanks for the photos. I appears that the gap seals are attached to the bottom of both the wing and the aileron with a bit of slack to account for aileron movement. I assume the are constructed out of the same covering as the wing and aileron. thanks again for the input. -------- Mark Twinstar MKII Great Bend, PA Read this topic online here: http://forums.matronics.com/viewtopic.php?p=446739#446739 = Photoshare, and much much more: = = = ------------------------------------------------------------------------------------- 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.