Text Box: Text Box: Iron Bay Model Company
P.O. Box 6383 
Wheeling, WV 26003
304-232-7511 Ph/Fax
service@ironbaymodelcompany.com


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Fuel Regulator

The Iron Bay Fuel Regulator is the ideal solution to many fuel delivery problems.  It is a diaphragm based on-demand regulator.  Simply put, when your carburetor draws fuel, it opens and allows fuel to flow.  The more your carburetor demands, the more it opens. 

 

Actual size is approximately 1” x 1” x 1” tall

The Regulator prevents flooding in installations where the tank is higher than the engine, and it insures consistent fuel flow in installations where the tank lower or a long distance away from the engine. 

 

With a typical model airplane engine that uses muffler pressure, the volume of fuel entering the carburetor varies constantly due to the changing muffler pressure, g-forces, and position of the fuel tank in relation to the carburetor during flight.   

 

With the regulator, all of these variables that cause inconsistent operation are eliminated.  Of course your needle valve still meters the amount of fuel going into the carburetor, but the regulator provides a constant flow based upon demand (vacuum created in the carburetor venturi).

 

Fuel is provided to the regulator through either muffler pressure, crankcase pressure or even an electric pump.  The amount of pressure can vary substantially with no affect on the performance of the regulator.   

 

 

The regulator works perfectly with most model aircraft engines.  We have tried it on engines as small as .10 cu.in. up to 4.5 cu.in., and have had success with both 2-strokes and 4-strokes. 

 

Although they are few, there are some engines that are not compatible with the fuel regulator.  These engines typically have very large-bore carburetors that do not create enough vacuum in the carburetor venturi to pull the diaphragm sufficiently to open the valve.  Subsequently these engines starve for fuel and run too lean.    

 

On virtually all engines you will notice that your needle valve must be opened up further than normal because it is now operating under a vacuum principle.  The fuel going through the needle valve assembly is being pulled through under vacuum instead of being pushed through by muffler pressure.  

The location of the fuel tank is insignificant.  It can be 6 inches from the engine, or 6 feet.  The only important factor is that you provide enough pressure to the regulator.  Muffler pressure is adequate for most installations, but on longer fuel line runs, crankcase pressure may be needed.  The photo below depicts one possible location to tap your engine crankcase for pressure.  Some engines already come with a tap installed, and others have a reinforced boss to drill into.  Consult your engine manufacture for their recommendations prior to addition of the tap.

The one-way check valve provided captures the positive pressure pulses from the engine and forces the fuel from the tank into the Regulator.  On high rpm engines like the ducted fan engine shown above it is not unusual for the fuel tank to swell from the pressure.  As such the fuel tank should be wrapped with fiberglass tape (typically 1” wide) and epoxied into place.   

The external components of the regulator are made from anodized aluminum, brass, and steel for durability and longevity.  Also included are two plastic fuel line tees, a brass pressure tap, and a check valve.

 

Medium fuel tubing can be used and will fit over the large central input fitting on the regulator.   

 

The Fuel Regulator P/N 6131000, sells for $43.95 plus $8 for domestic S&H.  Or add $25 for international S&H.  We accept Visa, Mastercard or PayPal. 

 

You can email your order to us at  service@ironbaymodelcompany.com 

We accept Paypal, Visa, MC

The Fuel Regulator is warranted for defects in material and workmanship for a period of 90 days.  The warranty is void if the regulator valve element has been tampered with or removed.