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HomeAircraftHelicopterKyosho Caliber/Quest Neo-Caliber series › Taming the fast EP-700
02-07-2010 08:32 AM  8 years agoPost 1
tskg2

rrApprentice

Wellington, New Zealand

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Hi guys-

I am very pleased to be flying a second EP-700 as a demo unit. I flew the first one 18 months, then I on-sold it to a local guy.

I sure could use some help from you clever folks- I need to tame this thing down a touch. Either it is really fast- or I am slowing down a touch- I prefer the first one, of course.

Anyway- here are a couple areas that I'd like some assistance, please:

Headspeed- I need to get a tacho on it- but the RPM's are insane! I am running in Gov mode, and would like to wind the head speed back. Suggestions?

Swash plate- I am finding the swash plate to be super sensitive. I am not running digital (yes, I know- stone age stuff) and the thing is still really touchy. I am now at 30% expo- which is more then I usually run- just try to calm the thing down a bit. Ideas?

I don't think it's me- because I fly my Cal5 with the Hill electric conversion and a great looking Hughes 500 fuse- and the thing is as sweet and smooth as you'd want. So- I don't think it's all my dumb thumbs.

Thanks in advance- G2 in NZ

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02-08-2010 03:04 AM  8 years agoPost 2
Dwight

rrApprentice

West Chicago, IL

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If you are running a head speed in excess of 2000 you will likely experience aggressive stick inputs. The reason for this is the thrust bearings are not big enough to handle the excessive loading. If you run glow models at 2000 head speed they load down during maneuvers but with electric this is not the case. I also recommend running 550mm blades. 570mm has a greater likelyhood of this problem.

Dwight

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02-08-2010 05:09 AM  8 years agoPost 3
Kevinator9

rrApprentice

Palmerston North, New Zealand

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Hey George!

Give Dwights idea a shot.
Also you could try lowering the headspeed with the throttle curves (Flat Line?) and if that doesn't calm down your cyclic you could decrease the aileron and elevator throws in your radio (swash afr).

Just another input

Andrew

Andrew

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02-08-2010 08:33 AM  8 years agoPost 4
tskg2

rrApprentice

Wellington, New Zealand

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A- thanks for these thoughts.

To start with, with this second 700, I have just re-bound this machine into the previous heli's setup. So- all values, etc have been the same from the first one- since this one is supposedly the same.

Well, the beeps that sound when you first plug in the batteries is certainly different with this one. The head speed certainly seems faster- with the same throttle curve as last time.

I think I started with a value of maybe 55 on the throttle- I have already pulled it back to 50, with little effect. I can now check the RPMs with my tacho, so I will do that. I have no problem with winding the beast back to 30, and going up from there- but can anyone tell me the desired RPMS?

As for the swash values- I am already down from the +65, -65, +65 as reccomended by Kyosho- I am now trying to run this thing at 52.

The first machine was fairly OK at the same values I started this one with, and this machine supposedly has all the same gear and motor. I understand that once we get the head speed down to a normal level- that'll help the cyclic response. I'll put 550's on, and maybe try to get the RPM's around 1700 to start with. And will wait for more help for folks as to the correct RPMs from there.

Maybe the fact that the beast can go a million miles an hour is a good thing- I ain't complaining about that part. Just wanna dial it back for a normal guy like me- since I ain't you!

Best- G2

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02-09-2010 03:16 AM  8 years agoPost 5
Kevinator9

rrApprentice

Palmerston North, New Zealand

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Hmm so they are running the same gear as each other.
That might mean that the esc has been setup differently than the previous one. Could be the governor was/wasn't on the previous bird and now it is/isn't on?
Also the metal head will make it a lot more aggressive on the sticks than the previous model plastic head, you can go through the head though and change the input/output options if you wish to slow it down mechanically.

Andrew

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02-09-2010 06:17 AM  8 years agoPost 6
RAK402

rrElite Veteran

Alhambra, CA

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Mine tachs out at about 2150 on the head.

I have been trying to go the other direction (i.e. to speed it up).

I am running as much control throw on cyclic as I can get, KBDD paddles (which helped a great deal) and KBDD tail blades.

It is very smooth and precise, but not very aggressive (I usually fly Compass machines which are very aggressive in comparison).

Here is a partial video a friend of mine took-I am just nurgling around with it:

http://www.youtube.com/watch?v=Op7dtivLSYk

Team KBDD/Compass Team Manger/Experience RC/Team JR Americas/WR Field Rep

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02-09-2010 06:30 AM  8 years agoPost 7
tskg2

rrApprentice

Wellington, New Zealand

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RAK- thanks for this- plus the link to the vid. Your machine looks very good to me- well done. I know I can get this machine to do what I want- just confused to the differences between the 2 machines.

Actually- I think the other chap in this thread, Kelvinator, will be interested in what you can contribute to hopping up the 700. He is a much better flier than me, and also smarter, as you may have noticed.

He'll be looking to put a Cal5 boom and belt on the 700, with some slick 600mm mains- and then thrash the machine. Your advice about the paddles will be well received, I'm sure.

Kel- maybe the sexy metal head can account for some of the very quick response- you may be on the nose. I think I should have time to grab the machine tomorrow after work and see if I can get the machine to purr for me.

Thanks to all- G2

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02-09-2010 02:15 PM  8 years agoPost 8
RAK402

rrElite Veteran

Alhambra, CA

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tskg2,

Thank you for the kind words, sir.

Does you newer machine have the stock head (metal hub and yoke, plastic grips, plastic Bell/Hiller mixing arms mounted on the flybar) or the newer version with metal grips and the Bell/Hiller mixing levers mounted on the blade grip arms? (I was sort of unclear on this from the previous posts).

Like Kevinator, I should think the newer one would be more aggressive that the older one, just due to the mixing design. Probably also easier to get symmetrical collective pitch on the newer version.

I am also interested in stretching the machine to a 600 size-that should lower the disc loading and improve the performance somewhat (I would like to have a bit more power on mine).

Team KBDD/Compass Team Manger/Experience RC/Team JR Americas/WR Field Rep

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02-09-2010 05:06 PM  8 years agoPost 9
tskg2

rrApprentice

Wellington, New Zealand

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I'm one of the first folks in NZ to have the new metal head- and it seems to be very nice.

It may be a case of "pearls before swine", but I do want to get this heli running as good as possible for an old duffer like me. With everyones help- I think we'll get there soon.

As for stretching the heli- keep in touch with Kelvin (actual name is Andrew)- he's a good guy and I know he'll keep you in the loop.

Have a good day- G2

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02-14-2010 03:09 AM  8 years agoPost 10
tskg2

rrApprentice

Wellington, New Zealand

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Update- good news
With some great help from all you folks- this 700 is starting to be a bit more fun.

Granted- this afternoon the wind was a tad too high for the rest of the club- but I spooled the heli up with a greatly lowered throttle curve. It sounded much better, and then a mate arrived who had a proper tacho. He got the head speed for me- 1825! I can only imagine what the head speed was before I made the change- yikes!
Makes a huge improvement- the heli is not quite as screamy, thank goodness.

I managed a couple minutes of easy circuits in the howling gale, but I do think that the beast is tamed now. I'll look forward to some more settled weather, and then I'll get some serious flying done, I reckon.

Huge thanks to Kelvinator, Dwight, and RAK402- your help was super!

G2

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