Co-Pilot Throttle

This blog cover the installation of the rear throttle

Overview
A basic throttle was installed for the co-pilot for emergencies and demonstrations. This will be backed up with a removable basic panel to be cover later.

The factory now supplies a throttle for installation but there was one in the toolbox so that was selected for installation. 

Factory throttle option

Note: Remember his aircraft was one of the first kits and there has been a significant reconfiguring and upgrading of the whole aircraft and kits including this one. 

Installation
A mounting plate was fabricated from a piece of 0.020'' x 2024-T3 attached to the two stiffeners located on the port side using six [5] M3 rivet nuts and screws. Next the throttle was disassembled and unwanted material removed especially from the rear plate. Then five [5] M5 rivet nuts were installed into the mounting plate with one [1] installed in the backing plate to act as a friction lock.

Co-Pilots Throttle Quadrant
Note: handle mounted in wrong pivot

With all the mountings prepared the throttle was assembled using the five [5] mounting points. 

To connect the rear throttle to the front throttle a 7/32'' bowden cable was used combined with wire lock collet to provide attachment for the clevis. With the wire lock secured at the rear throttle end, a clevis was fitted and secured to the throttle arm with a cotter pin.

Finally the arm was maneuvered onto the pivot point and secured using a M5 bolt and adjusted to a light drag.

Cable Route
A route for the bowden cable had to be selected as it had been decided to not install a rear throttle to save weight and the complexity but again on the last factory visit I yielded to Franco recommendations.

Clamp

A single 7/32'' was drilled through the roll cage attachment on the point located where the middle bolt is on the opposite side. The cable was run across the face of the backing plate for the map pocket and through the bulkhead behind the pilot's throttle.

Collars

To retain the cable at the roll cage penetration two [2] DuBro 7/32'' collars were installed on either side of the penetration at the roll cage with a bowden cable clamp fitted at the bulkhead at the rear of the pilot's throttle consul. 



At the bulkhead behind the pilots quadrant a 0.040'' 2024-T3 bracket was fabricated and the collar clamp fitted. 

The collet nut was located on the inside face and the collet external face was treated with Loctite No-Sieze at installation there a bear to separate after tightening.

The steel nut was replaced with a AN-4 bulkhead nut and modified to fit as shown - why - its lighter and it was there in the bin. 

At installation the star washer supplied with the collet was replaced with a flat washer and thread lock applied.

Co-Pilot Quadrant

Comment
Tested and operated smoothly and it's one job finished with the biggest task beign mating the rear throttle quadrant with a 50 mm throw to the front having a 65 mm throw which matches the actuator lever on the Bing carburetor.

All the hardware used work as advertised by the suppliers.