ELTIGRE Since I posted early in this thread I don,t wish to be misunderstood, Please do include me in your list of my fellow purveyors of "BULL" Its amazing to me that so many of my successful aircraft dating back to the mid fifties encompassing a Controlline and RC with a little freeflight thrown in for seasoning were in reality just bull and could not have worked. Pity my memory must be fading.

By the way just as Jim Thomerson indicated (this gentleman knows of what he speaks) Few Ukie stunt flyers ever needed to invert for starting.

Its really simple; in any straight suction or suction/muffler pressure system the key most important factor is the Tank/spray bar height relationship for a successful operation. Now I would agree that with throttled engines there are two types of carburators that can be problamatical with an inverted installation and there is no mystery to it at all; Engines that use a rotating directional spraybar for midrange leaning or any carb that uses a simple bleeder for mid range. The reason is simple these type of systems are not as effective at leaning the midrange area and therefore are a little tougher to get right.

Here are a couple of my most recent additions that have never had a flame out or throttling problems in many flights. Well except with some deliberate ones by short tanking the twin. The single is a Magnum four Stroke and That twin by the way which has TT .46's were installed new after a few runs in stands and they transition just as well as any other of my TT's mostly sideway mount in my pylon ships. I only rarely will use an upright mount because like it or not that orientation offers the least uniform fuel delivery from full to an empty tank of all simply because of the difficulty in attaining the optimum tank/spraybar relationship in many airplanes with that configuration.


So Please, Please include me in your "BULL" list.

John