CFK Blade Lift

[Electric4fun]

Hello Everyone!

I have both the 960 and the 1060mm CF blades. With the 960 I have a higher head speed, but can only get about 3 feet of elevation in a hover. With the 1060mm blades I have a lower head speed around 1400rpm, but can climb to any elevation desired.

I have worked with my pitch and throttle curves for the 960mm blades to try and correct this but with no luck.

Can anyone give me some ideas why this is?

I like the 960, because they are more responsive to my input control. Not that I have bad control with the 1060mm blades.

I am using a BB 22turn Kyosho Magnetic Mayhem with a 12T Pinion.

Any Ideas how I can change my vertically challenged ECO 8 with the 960mm blades?

Thanks for your thoughts,
Warren

[Richard Fry]

Warren,

How may cells are you using?
Is your MM the 'Reversed' style?
What is your pitch at top end?

I have been using the MMR for months now on 10 x Sanyo 3000 cells, and recently got similar results on 8 x Sanyo 2400 cells. I have only ever used the 'stock' 10t pinion - I do carry the 13t with me, but have never got around to trying it.

I use the 960 blades (have done since I got them back in January) and only very seldom change to the 'stock' woodies. I have no problem with power / height at all, the power curve on my 3810 radio with 'Idle up 1' selected is 100% at all points - this gives me plenty of cyclic response and power to throw in the pitch when I really need it.

If you want to see this set-up flying, go to www.tmfc.org.uk (http://www.tmfc.org.uk) and click on the 'Photo Album', then 'Helicopters', and click on the 'thumbnail' of the ECO. You can then download a video of my machine flying.

This is the same ECO which set the British record for Electric Helicopter Duration last month with 13 minutes 38 seconds (out of 5 attempts over two days varying the head speed / pitch setting this was the best we could do with this set-up).

Hope this is helpful to you

Richard

[Electric4fun]

Thanks for your reply Richard!

I am using an MMR. I am also using an 8 cell Sanyo 1900 pack. I have a 10cell Sanyo 1900 pack. I think what I need to try is put the 10T pinion in it and give it a go. I have been thinking about it and think that will do the trick. One becasue with the 10cell b-pack my MMR gets a little hot.

I am also using a Jetti 500 which works really well and does not get hot. My top end pitch is +10/+11. I have my hover Throttle set at about 70%. I guess that would be the same as your Idle-1. I have a Futaba 6HXS. At hover stick I have about +6 deg. of Pitch. Like you I have replaced the Bushing is the MMR to BB.

This last week I took the 960GFK off and put on my 1060GFK's with a 12T Pinion and get about 1400RPM head speed and the heli will go out of sight if I let it. I think either way I need to give the 10T Pinion a try I might even get longer flight times. The one time I check flight times was just after I got it together with the woodies on and got 8+ min. out of it.

I also use a 8-cell 1250 pack that does good, jut because I loose alot of the weight. I am still a baby Heli Pilot and am getting comfortable with a hover and am starting to transition into flying around the yard.

By the way nice video of the ECO and nice Flying. Well I have the Performance motor on the way to me and look forward to seeing it perform. I want to put it up against the MMR and see if it is really worth the $100US that I paid for it. Hmmmmmmm?

Thanks again for your thoughts if you have any additional please share.

Happy Flying My Good Fellow,
Warren

[joe]

I also have an eco8 with the mm motor and 960 blades
I use the 10 tooth pinion and 12 sanyo 1300kr cells
flights are about 6 minutes of hovering.
The motor dose not get hot on this setup.
I have used two packs in a row with this setup.
I also could not get it off the ground with less than nine cells even with a 14 tooth.
it even outperforms my now deciesed aveox 1406 2y and 8 2400 cells that bit the big one this summer.
Just good cheap fun.
hope this helps Crazy Joe

[Electric4fun]

Thanks Joe....

Right now I am flying the 1060mm GFK blades and a 12T pinion is working well. When I go back to trying the 960mm blades I will switch out the 12T pinion for the 10T pinion.

With the set-up I have now I am getting about 8min. of hover time out of either a 10cell 1900mah or an 8cell 1900mah. I also have an 8 cell 1250mah cell and am getting aporx 6min flying time.

The MMR is the way to go in my opinon. Easy to use, to modify and cheap fun as you say..

Lets Fly,
Warren