Tanaka 26CC CONVERSION ON GAS/METHANOL

Here we have the Tanaka, stock, ignition conversion being tested with a selection of props and fuel mixes.

The normal prop for a 26cc, I'm told is an 18 X 6 but in this case, we are illustrating this engine swinging a 20 X 8 Zinger wood.

Top end is 5400 RPM and idle is a steady, 1700.

It was getting dark so the tach was bouncing around but finally settled down to give us readings.

Idle is all day with good transition. Cracking the throttle open produces a lean hesitation for a split second but the engine never stumbles and catches for a strong response.

Note that we are using a stock, RC engine carburetor. The original that came with this engine had both high and low needles that were non adjustable. This carb is from an OS .108 with the barrel just slightly larger than the Walbro that came with the engine.

The fuel on this run was a 50/50 mix of 91 octane gas and methanol. Oil was Klotz Benol (castor) at a mix of 30:1

Testing on several props reveals that the engine idles and transitions best on the blend rather than an all gas or all methanol mix.

The interesting thing is that the needle needs to be out 1/4 turn on gas and 1/2 turn on methanol. This is to be expected but the blend actually puts our needle back to the gas setting.

Duration : 0:0:51