I'd be glad to here of your opinions on the Eleo, in answer to your question I would suggest that the blades are very slightly out of balance / tracking and when you spool up or down before reaching the correct headspeed. The heli will wobble then it once it passes through then stops, unless your tracking is miles out and then that's a different story .

It'll be something slightly out of balance or a bent main shaft or the shaft that runs through the head.

If you have a stock plastic head examine it very carefully they can sometimes be off true from the factrory.

Hi Alan,

Are you using the stock wooden blades that came with the eolo kit?

If you are they are notorious for having balance and weight problems. To sort them out, follow these steps;

Take both blades and one at a time tie a piece of thin string (strong cotton is best if you have any) about 12 inches long, one blade on each end of the string. Now put the string with the blades on the ends on some sort of supported pivot like a boom support (something round allowing the string to move easily over it) Hang the whole lot up so the blades are allowed to dangle down freely.

What we are looking for here is if one of the blades is heavier than the other one it will drop further causing the lighter bladed to be pulled upwards.

Of course if you have some accurate kitchen scales you could just weigh both blades on them instead

Now that we have identified if one blade is heavier than the other we need to balance them such that both blades weigh the same. You can do this by either modifying the original lead weight inside the blade or by adding tracking tape, making sure the piece wraps right round the blade.

So now we have the blades weighing the same, is that it? well no, not quite, now we need to see where abouts on the blade the extra weight if any is needed, needs to be.

Ideally we need something like a Quick UK blade balancer, or make something up to be able to bolt both blades one on each end of something straight, flat and strong, this then needs to be balanced carefully across something so the blades at each end are allowed to rise and fall freely, so that they counter balance each other.

This will tell us if the weight on each blade is in the right place, for example if the weight is too far out towards the tip on one of the blades it will drop, causing the opposite blade to be stuck up in the air.

If this is the case and one blade is up in the air and the other one isnt, we need to get them the same. So having previously found that both blades now weigh the same we know that it must be that the weight on one is too far out towards the tip.

As blade performance is better with the weight closer in to the root, we need to concentrate on the low blade. If by chance this is the one we added the extra tracking tape to, thats great, all we need to do is take it off and move it closer in to the root a little bit at a time until both blades counter balance each other exactly.

If on the other hand the low blade is the one without the extra weight we put on it earlier, we now need to take the extra weight off the opposite blade and move it out towards the tip a little at a time until they counter balance each other exactly.

Now we have a set of perfectly balanced blades, the only thing left to do is try them on the eolo

I hope this helps.

Cheers,

Pete.