[Air Brush trouble]

The best ever thinner I was ever advised to use with acrylic in an airbrush was one drop of glycerine, and windowlene spray, not the purple cream, the blue spray, mixed to milky consistency. Try it guys.

The one drop by the way is a tiny drop from a pin.

[how do I get the best value from my sim]

Take that advice from the moderator Dave, concerning Dead Sticks

Also, do this practice when you get out to your flying field

[Just cant get it to fly right - advice please!]

For our next flight test, remove the EXPO as this may most certainly calm yopu down, the aeroplane does not know it is there.

Remove the EXPO.

Flat plate wings are fine and quite aerodynamically sound, so for our next flight, add some reflex.

This is achieved by setting manually by pushrod etc both ailerons up 1 mm.

Let me know how much calmer the model becomes.

[Engine size possible problem?]

Yes Ryan

Your Spitfire does appear to be over propped as it is labouring and you have to maintain your high throttle setting just to keep it airbourne.

Do try the 13 x 6. Also, is the motor run in? It can take a couple of hours to run in, and my test is the tick over, A tight motor will not tick over steadily below 3000 rpm. Run in, it will tick over between 2200 - 2400rpm

Your fuel? use no less than 10% nitro with synthetic fuel, and perhaps 15%, try both

On landing, do keep your model moving all the way to the ground, then cut the throttle. It is the idle motor setting, with the slow glide in that surprises some pilots with a Spitfire dropping a wing. But most scale models do that when landed too slowly.

Good Luck

[Which engine]

Posted by Peter Etherington 1 on 03/01/2016 18:43:11:

Just sent off for the David Boddington 60 inch Bleriot XI plans for 0.30 glow engines but I was thinking of putting a 4 stroke in it. Ive narrowed the field down to the APS 30 FS or the ASP 52 FS. Many years ago I seem to remember someone saying to me that when using 4 strokes go up in cc because they dont have the poke of a 2 stroke. Is this still the case? Would appreciate any information please. Just done some research and found that the PAW 29 which is on the plans weighs in at 300g and the ASP 30 FS weighs in at 275g and the ASP 52 FS is 455g. Many thanks, Peter

Edited By Peter Etherington 1 on 03/01/2016 18:59:12

Hi Pete,

The ASP 30 has flown similar models for me on both a 9 x 5 and 9 x 6 props, importantly using 10% Nitro mix. These small motors take about an hour to run in and to achieve the 9000 - 10000 revs claimed, as 8000 is more like it when new.

Also the tick over when new is far too high around 3000, you cannot land as it flys by you.

when run in, your motor should tick over around 2300 for landings

It does run adequately on straight fuel, but I have found with modern synthetic fuels with 10%, have all my 4 strokes running well.

As you discovered, the 4 strokes are bigger but well worth the modifications, simply moving the bulkhead back