Engine - Reservoirs

This blog cover the mounting of the oil reservoir for the supercharger and engine.

Overview
After searching there are no details on a stand alone mounting bracket for the Rotax 912 oil reservoir so this meant there were no ideas to use but after some thought using weight as the guiding principle a simple U bracket with band clamp was developed.

Installation Oil Tank
The bracket was fabricated from 25 x 3 commercial aluminium flat bar with bands created with two [2] x 100 mm OD worm drive clamps. The clamps chosen were purchased at a local auto store featuring a long length of un-perforated area. To prepare the bands one had the worm drive cut off with the other cut at the start of the perforations, finally both bands overall length were trimmed to start at the fold placing the worm drive about the center of the assembly

Both bands were drilled to place a two [2] x 1/8'' pop rivet at 10 mm from the fold line and the end of the bracket with the holes matched drilled through the bracket. All holes for the lower mount were drilled to suit M4 screws in the bracket with both holes placed at the edge of the clamp and at the edge of the fold.

Note: These locations selected for the rivet and screws in the void created by the interface with the oil tank. 

Both brackets were alodined then bands riveted to both bracket ensuring that they closed up before riveting.

Oil tank moved to other side to avoid fouling sensor on supercharger
Note relocated to the starboard side

The Adell clamps were fitted to the engine mount then the lower mount fixed to the engine mount via the clamps. With this bracket in position, the tank was now installed the band tightened, next the top side was wired to the engine mount. 

With the lower Adell clamps fitted the upper one was slipped into position and its mounting point marked onto the upper bracket. The bracket was removed and the hole was drilled and tapped M4 and a screw fitted with thread locker.

The assembly was reinstalled and all points tightened.

Note: Ensure there is space for the engine mount rubber to pass the clamp for the oil reservoir

Instillation Supercharger Oil Reservoir
Two spreaders were fabricated to use the factory mounting points using 25 x 3 aluminium bar with 20 mm extension past the tank mounting to accommodate the Adell clamps. The lower bracket uses two [2] Adell clamps  with the upper one scalloped to clear the reservoir inlet. The bars were fixed using S/S M5 x 10 cap head screws with the Adell clamps fixed with M4 screws.

Relocated to the port side

Comment
All the mounting holes would be tapped for ease of installation if doing it again. After a trial installation with a dummy engine and cowls both reservoirs were swapped to opposite sides with the oil reservoirs on the starboard side and the supercharger reservoir on the port side.

Another job finished..!

Update
A trail check using a dummy engine proved that all the parts with fit as intended. This engine will be used to manufacturer all the necessary brackets etc for the final installation of the converted engine.

Trial install - note final location of oil tank [crank, pistons are removed] 
This engine was removed and was found to be close to failure.  I was flying behind this few hours before my L2 noted the issue after flying the aircraft back to its base
over the Blue Mountains....!

It will all fit....!