GX200 Eggmotor. Mk2 Flight, High Marnham

This was the first test flight since the revised Eggmotor frame fabrication and with the new, larger 36x10 Xoar propeller. Other modifications include larger pulse pump fed fuel tank, remote choke control and 'over-shoulder' starting capability.

Brian 'Turbo' Tunnard kindly captured the event at a secret Cloud Hoppers site about a month ago.

Wind was zero to 7-8mph and light thermic. Launch appeared relatively easy after the left wing tip popped back out and I climbed at a reasonable rate (for an Egg) until I seemed to climb no more??? I made the decision to abort a circuit and land in the next field. Could well have been rotor off the nearby trees causing me to fly through sinking air perhaps? I guess more thrust would have got me through it ;o)

Onwards and hopefully upwards......

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[weirwolfarroo]

Not sure if it was dodgy or not, I might have just been unlucky - or lucky it wasn't in the air... The solo prop is a pretty good match for the wooden one you have, so it will be asking a lot, but don't eggmotors theoretically have a similar hp to solo 210's, though obviously very different animals being fourstroke and so on?

[lookupparagliding]

@weirwolfarroo Current power is similar to solo but not sure where the peak power rpm is. Defo worth a shot though Tom.

[weirwolfarroo]

I'm going to try out my full size solo 210 prop directly on the shaft- a move precipitated by the disintegration of my 34" Born prop under power this evening! No idea why it split but it probably means I'll have to start bugging Xoar for a prop- what were the magic words you used to get them to let you order one?

[lookupparagliding]

@weirwolfarroo Hello, Did you have a prop plate fitted to evenly distribute the bolt loading over the prop hub section? A while ago someone fitted a large prop to a gx200 prototype and used only washers, it dramatically failed (I've pictures somewhere). If not I can send you one in the post, it's the same as I use. There are two 36x10 Xoar props on ebay at the moment (plus hubs) with 3 days left to run. Buy-it-now £120 or start bidding at £50. Hope this helps, Rob. p.s. sorry to hear about prop.

[weirwolfarroo]

@weirwolfarroo It split alongone of its blades, rather than in the middle, - the middle is nicely protected with one of your patented prop plates already! I'll have a look at the Xoar props right now...

If the big prop works I'll post the results.

[lookupparagliding]

@weirwolfarroo Hi Tom, I forgot I'd sent you a plate :o) Seems weird to split like that, do you suspect dodgy manufacture? What diameter and pitch is the Solo prop? Good luck if you bid on the Xoar props. Rob.

[lookupparagliding]

@weirwolfarroo Hiya Tom, I bet if I'd have turned left away from the trees instead of gingerly heading for the 2nd field then I would have climbed out ok :o)

Although 3 and 4 blades are probably more efficient, the drop in rpm and consequently the resulting lack of power would be too great to overcome I think.

I've still got the milled head and/or bored/larger carburettor options to try before I start pulling more hair out ;o)

Cheers,

Rob.

How's your Egg doing matey?

[weirwolfarroo]

It sounds as if the motor has more to give - do you think a three bladed prop might work, or why not try the old prop and the new one both together?