Cheap carb balancing kit.
Firstly, I believe the Europa club has a Skydrive carb balancer which can be
loaned out. Its a more sophisticated version of what I am about to describe.
If you prefer to make your own see below.
I made mine from a pair of Gunsons car tuning gauges (think they are called
Hi Gauge) purchased from Halfords (about 15 each from memory). You need a
restrictor to iron out the oscillations for which I used a couple of fish
tank air regulators (50p each probably) and a length of instrument tubing
(PVC)
Remove the balance tube between the inlet manifolds and connect a guage to
each one. Its a good idea to fit a balance pipe between the guages to check
that they are reading the same initially, but must be removed or shut off
when balancing the carbs.
If anyone would like a photo, email me at carl@flyers.freeserve.co.uk
----- Original Message -----
From: "Roger Anderson" <randerson@skewstacks.freeserve.co.uk>
Subject: Re: Europa-List: Carb balancing - Differential presure gauage ?
> <randerson@skewstacks.freeserve.co.uk>
>
>
> ----- Original Message -----
> From: "Paul McAllister" <paul.mcallister@qia.net>
>> I was wondering if this could be done with a single gauge that has a
> center zero and maybe 5 ~ 10 psi either side. I haven't tired to locate
> such a gauge but I shouldn't think it would be too hard to find one.
>
> Paul,
> I balance my carbs from time to time using a home made water manometer.
> It comprises a length of tubing (that was originally supplied for the
> instruments) into which I put about a metre of water. I disconnect the
> balance tube between the manifolds and connect the tube between the open
> ends. I attach the tube to a solid support alongside the aircraft and
> visible from the cockpit such that there is at least a metre of empty
> tube
> each side above the water level. I then run the engine and adjust the
> cable
> lengths to achieve the best compromise of balance throughout the range.
> If the imbalance is such that the water gets sucked/blown out you get a
> puff of steam from the exhaust and have to start again - possibly with a
> longer tube!
> It is interesting to note that rapid movements of the throttle always
> cause an initial imbalance but that this rapidly subsides - a good reason
> for being gentle with the throttle.
> Roger (G-BXTD)
>
>
>
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