Selecting the position for your throttle quadrant lever assembly is more of a "fit" to your needs and one you should feel comfortable with when flying. First of all, the quadrant can be positioned on either the left or right side of the fuselage, whichever you feel you would be more comfortable with. Sit in the front seat with cushions, bend your elbow so your hand is forward. This should be where you will want to rivet the throttle quadrant lever assembly to the top side rail. The rear quadrant lever assembly position will be dictated by the length of the quadrant lever attaching cable, which is much thicker and stronger than the quadrant cables that run back to the carburetors.

In the photo above, the builder placed the throttle quadrant levers too far aft for easy and comfortable handling. As stated above, you should place the levers where you will be comfortable with them when flying.

As stated above, the sleeved lever to lever quadrant interconnecting rod is much thicker and stronger than the throttle cables that run back to the carburetors. You will need to feed one end of this rod through the front quadrant lever cable - secure fitting and tighten the setscrew down onto the rod. For safety reasons bend the tip of the rod down a little to help keep the rod in place when in use. This will help prevent any possible slippage.

NOTE: The builder will be removing the quadrant lever assemblies after fitting all of the cables. You will note the builder used aluminum rivets to hold the lever assembly in place during fitting of the cables. These rivets will be removed and replaced with stainless steel rivets when the lever assemblies are permanently installed. This will be after the covering and painting of the fuselage is completed.

Although this photo on the left is a bit blurry, you can still see how the cables are connected to the rear throttle quadrant lever. You will be attaching the two throttle cables which will run back to the two carburetors on your Rotax 503 engine.

Use Clecos during the fitting process, replace the aluminum rivits with stainless steel rivets when the throttle cable fitting has been finished and ready for permanent mounting.

The best location for the enricher lever is wherever it would be most comfortable for you to reach, but will not come in conflict with the flaperon crank handle. The lever assembly can be permanently riveted with stainless steel rivets at this point in construction.

Like the throttle cables, you will want to mount the enricher cables with Clecos first while fitting them to the carburetors.

In this step, you will not actually be connecting the cables to the carburetors, but instead just fitting the cables to their proper locations at the carburetors. The important thing here is to adjust the cable lengths for the amount of cable needed to properly reach the carburetors with any excess cable being kept inside the fuselage.

You will permanently attach the cables to the carburetors during the final engine mounting stage of building your Challenger.

You may now permanently secure all the cables with stainless steel rivets. The engine can also now be removed to continue with your building process.

With Aero Controls' throttle quadrants, the enricher quadrant is included as part of the assembly; see below. This makes the quadrant package a little more user friendly during start-up and flying. Custom quadrants are available from Bob at Aero Controls. Complete, detailed installation instructions come with the custom throttle quadrants.