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1. 04:02 AM - Re: Re: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) (Lynn Matteson)
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| Subject: | Re: 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:
> <don.honabach@pcperfect.com>
>
(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
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