---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Fri 08/05/11: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:02 AM - Re: Re: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) (Lynn Matteson) ________________________________ Message 1 _____________________________________ Time: 04:02:54 AM PST US From: Lynn Matteson Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) Speaking of "finer control".....I almost forgot to suggest that you make some sort of mechanical device...I made a bellcrank....to increase the effective length that the throttle control has to move to make the throttle slide of the TBI move the 40 mm or so that it moves from idle to wide open. With the suction acting on the back side of the throttle slide, there is a good amount of pressure required to make the throttle initially move. Plus there is the fact that 40 mm of 1:1 mechanical action is a rather coarse way to try to get fine rpm increments. My bellcrank turns this 40 mm of movement (of the throttle slide) into about 3" of throttle control movement. That makes the incremental rpm gains easier to "finesse". Of course, I also use a vernier throttle for the fine touch, but the mechanical advantage is better with a longer throw gained from either using a bellcrank at the TBI, or a quadrant control in the cockpit. Lynn Matteson Kitfox IV Speedster, taildragger Jabiru 2200, #2062 Prince prop 64 x 30, P-tip Electroair direct-fire ignition system Rotec TBI-40 injection (sleeved to 36mm) Status: flying with "Ramcharger" intake manifold...1152 hrs (since 3-27-2006) On Aug 3, 2011, at 7:06 PM, Don Honabach wrote: > > (snip) > For what it's worth, while I appreciate the automatic nature of the > Bing Carb, I'm really looking forward to the finer control on the > Rotec TBI. > > Thanks! > Don ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message jabiruengine-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/JabiruEngine-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/jabiruengine-list Browse Digests http://www.matronics.com/digest/jabiruengine-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.