Robert Welford

My first visit to Buckminister too - I was very impressed. A very enjoyable day - thanks to Ron for organising it.

Whether john's comment was made in jest, or not, his comment is correct in the sense that correcting for adverse yaw when in sustained inverted flight requires the opposite rudder input. For an aircraft that exhibits adverse yaw a roll to the right from upright flight requires input of right rudder. From sustained inverted flight a roll to the right requires left rudder to counter adverse yaw. Ask any pilot of full-size aircraft - an aerobatic pilot would be better. Thus, the effect of setting up differential aileron will cause the opposite desired effect when flying inverted when the wing section is producing lift in the opposite sense. So using aileron differential clearly works for countering adverse yaw for aircraft that do not sustain inverted flight - gliders, scale aircraft. However, for aerobatic aircraft we (me included) tune the aileron throws with different aileron throws up vs down - aileron differential. Why? An axial roll is achieved when the roll axis passes through/along the fuselage - if not the aircraft wobbles around the pure roll axis. It is possible that tuning up vs down aileron movement (differential) on an aerobatic aircraft shifts the roll axis up or down so the roll axis more closely intersects the centre of mass. This matches my observations.

Thomas, I will seek out the instructions in the next few days - ok?

Back to the original question: I would never use a Y-lead for ailerons. Separate channel functions allows you to finely tune the throws on each aileron - essential for tuning any aircraft capable of aerobatics. Simple to do with Multiplex and Jeti. The other advantage is redundancy. The ailerons are independent and will allow some control if one servo circuit goes AWOL.

I have an unbuilt Flair Yak 55M kit in the loft with plan and instructions included. If you need further info. I could dig them out.

There should be a pipe(s) coming out of the back plate. 049 Babe Bee.pdf

Thank you for the advice about the YS 63S plug issue. I will inspect for debris inside engine.

Yes I also bought OS parts including Type F glow plugs from RC Japan a few months ago.

I have run Laser engines and YS engines for years using OS Type F glow plugs and find the plugs last for ever. However, I've been running a new YS 63S and it's been blowing Type F plugs on a regular basis. I thought it might be related to starting the engine inverted so I inverted the model for starting so the engine was upright. It appears to have made no difference. The engine is running perfectly with normal revs/power/throttle response. I don't believe it's running lean. I'm out of ideas, so wondered whether any of you might be able to help. Regards, Robert

The link states: Please note:- This is for NITRO powered vehicles only. Any reason for this statement?

Is anyone waiting for a Laser engine(s) to be delivered via MSL?

I also use bolts and Nylocs.

Everyone: thank you all for your suggestions. Regards, Robert

I read somewhere someone suggested snipping the fins off a Laser engine to get this type of remote plug to fit. That would make me weep 😂

Interesting: I've got a set of these, but use them for bending fuel tank pipework! BTW I use OS plugs as well.