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HelicopterHIROBOOther › evo 50 3D curves
08-12-2007 04:38 AM  10 years agoPost 1
menace

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Sydney, Australia

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i have a sceadu EVO 50 with stock engine, muffler (upgrade soon),
9255's, 401 w/9254, G3 Rx GV-1.
Carbontech 600 mains and tails

i cant get the GV-1 setup till i get someone who can help with 14MZ setup so i am running curves(need a giude for dummies tutorial)

therefore my current thr crv is
Idle1 100,87.5,72,49.5,47.7,49.2,72,87.5,100

Idle2 100,95,87.5,72.5,60,72.5,87.5,95,100

is my idle2 curve be enough for attempting 3D and holding the HS up ?

any help is greatly appreciated.

!boo!

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08-12-2007 05:02 AM  10 years agoPost 2
DarkSideSimba

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Alaska

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Curves look fine to me. Every heli will be a touch different when it comes to curves. Like my Evo50's are all diff in the curves but only usually 1 to 2 points diff in either direction. As for 3D.. Its up to you, you will never kno till you try. I would start with constant rolls/flips. This will move you through your entire throttle ans pitch curves. Then readjust if you need to. Dont kno its the easiest way I can think of. What I do. Then agains I dont run no govner..

DSS

Evolution.. Times Have Changed.. Has Your Heli??? Sceadu Evo.. Tomorrows Heli.. Todays Evolution

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08-12-2007 05:06 AM  10 years agoPost 3
menace

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Sydney, Australia

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cheers DarkSideSimba,

i just wanted to check that i'm not going to overspeed the motor
and the Idle2 is a NEW curve i have done, but havent flown yet

Cheers again,

!boo!

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08-13-2007 08:30 AM  10 years agoPost 4
racingstripe

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Sacramento, CA

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menace,
i have a sceadu EVO 50 with stock engine,
What do you mean by "stock engine"?
100,95,87.5,72.5,60,72.5,87.5,95,100
This is way, way too high. Even your idle 1 is too high.

How long is your flight time on just the main tank? Should be in the neighborhood of 11~13 minutes. 9 minutes (or less) is indicative of the mixture being too rich.
[edit] This assumes 30% nitro fuel. 15% nitro should go about another minute.

I would start out with something like:

78, 54, 46, 42, 38, 42, 46, 54, 78

Also, I'm sure the 14MZ has a pre-packaged mix for cyclic to throttle mixing. You'll want to enable it, start out at about 16 to 20% on the mix rate.

Hope this helps.

andy-

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08-13-2007 05:56 PM  10 years agoPost 5
DarkSideSimba

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Alaska

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Waaaa. Those numbers dont even make abit of sense.

Why 78, 54, 46, 42, 38, 42, 46, 54, 78??

At full pitch +,- you want max power. What your telling him to do is at 3/4 stick run just below half carb opening??? At full throttle you want the carb wide open in either + or - extremes.

menace you can run what you want but those numbers I would not run myself. No I dont have a 14mz but I cant see that radio being any different on curves like racin suggest. No racin I am not knocking you just dont see your logic in this. Please explain...

DSS

Evolution.. Times Have Changed.. Has Your Heli??? Sceadu Evo.. Tomorrows Heli.. Todays Evolution

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08-13-2007 06:15 PM  10 years agoPost 6
racingstripe

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Sacramento, CA

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DSS,

I overspeed at 100% throttle with +/-10 of pitch coupled with an OS50 Hyper.

Anybody running more than 11 degrees and using all that pitch is beyond flying on curves.

The point is you only need as much throttle that's needed to maintain your target rotor RPM at whatever your full pitch setting is. Menace did not indicate his pitch settings nor what his desired target RPM is.

If his desired RPM is 2100+ then my suggested values will be too low.

andy-

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08-13-2007 06:37 PM  10 years agoPost 7
DarkSideSimba

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Alaska

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Ahhh understood now. I believe his motor is just a plain jane OS50 none hyper. Thanks for that bit of info. On my 50s and 30's I have always ran 100 in both directions. I have never noticed my head ever over speeding. But though I do run my motor super rich. Buying a multi gov to stick in my Zero G here tomorrow. In all my helis it will be the 1st gov I have ever ran. Hopefully I will like it and start adding govs to all my helis. But Radio curves work rather fine for me as of now.

DSS

Evolution.. Times Have Changed.. Has Your Heli??? Sceadu Evo.. Tomorrows Heli.. Todays Evolution

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08-13-2007 09:34 PM  10 years agoPost 8
Auto

rrApprentice

New Zealand

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hi Menace,

I get overspeeding with a OS50hyper and tuned pipe and have my top end throttle back to about 85 with a rich mixture, the main issue is not the power at the top end, but the power at the mid stick which is as low as 34. To check for over speeding, just do a full power climb out and then unload the disk, if your sucking to much fuel it will over speed. You can do an inverted climb out to get your lower side curve set up.

To raise the V endpoints back to the 100% you will need to increase your availabe pitch since curves are all about setting the throttle to match the pitch at any given point, but if you have to much you need to throw more pitch at it.

I have not flown with a stock 50 so you may not experience the too much power syndrome.

My mid point so so low that coming out of a loop at mid stick was not really a option as the motor was not able to pull through the G's very well at 34%. I probably need to lean the mix a bit to get faster response at the lower rpm range.

good luck

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08-13-2007 11:28 PM  10 years agoPost 9
DarkSideSimba

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Alaska

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To check for over speeding, just do a full power climb out and then unload the disk, if your sucking to much fuel it will over speed. You can do an inverted climb out to get your lower side curve set up.

Can you explain this abit more. All in all what am I looking for in over speeding? The rest of it I understand. Thanks much..

DSS

Evolution.. Times Have Changed.. Has Your Heli??? Sceadu Evo.. Tomorrows Heli.. Todays Evolution

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08-14-2007 02:26 AM  10 years agoPost 10
Auto

rrApprentice

New Zealand

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You want to know what over speeding is?

Its the high revving you get when you have a heap of engine rpm and no load on disk. like if you have 80-100% power at 0 pitch, a similar occurance happens if you were to do a full power climb out and then zap into a bit of 0 or negative pitch ie unload the blades and then some.

If your engine sounds like its labouring slightly on the way up then chances are it is burning the amount of fuel its getting pumped in, if its not then it will still have fuel to burn at the top when you unload the blades..

I run about 1800 head speed, an over speed could push that to 2000 easy.

Is that what you needed to know?

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08-14-2007 02:32 AM  10 years agoPost 11
racingstripe

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Sacramento, CA

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It's been a long time since I flew a 50SX-H (with 40e carb)... Even with that engine, I'd say you're still prone to making more power than you need, though not to the degree you get with the hyper.

I know all of you know this, but one thing a governor does is compensate for cyclic input. As you rock over the right stick you're loading up the motor more and more.
Given that, since we're talking about t-curves, what if you set your collective pitch to 12.5 degrees because that's how much pitch you need to keep 1950 RPM at full tilt... What happens when you apply a cyclic input coupled with a full collective pitch input?

What I find that works is a compromise of some of the collective pitch... say 10.5 degrees max. Lower your t-curve points and enable cyclic to throttle mixing. The end result may be full throttle after all... Only that is is obtained with full collective pitch plus full cyclic input.

To adjust the mid-point, I do a series of ascents/descents, up to about 75~100' at varying climb rates, then transition to a descent anywhere from +2 to -2 degrees and listen carefully. You'll want to maintain your target RPM during a mild descent. I also listen for "cracking" which indicates the low end being too lean.

andy-

Proofread carefully to see if you any words out.

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08-14-2007 04:51 AM  10 years agoPost 12
DarkSideSimba

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Alaska

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Thanks for the info guys, so enstead of gov would you recomend a RevMax or similar?

DSS

Evolution.. Times Have Changed.. Has Your Heli??? Sceadu Evo.. Tomorrows Heli.. Todays Evolution

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08-14-2007 05:18 AM  10 years agoPost 13
Auto

rrApprentice

New Zealand

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Throttle Jockey Pro. easy to install, easy to program, easy to use.

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08-14-2007 05:38 AM  10 years agoPost 14
Fit

rrApprentice

Temasek

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Revmax for me. 100% throttle curves in Idle Up 2 and dial down the headspeed that you want. Voila! Easy as pie..

I suffer from overspeed very easily and the Revmax takes care of that. Now can concentrate on the flying and not worry about overspeeding.

Hornet X3D : GY401, 9CHP, AXI, MS116+____Evo 50, 50SXH

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08-14-2007 11:23 AM  10 years agoPost 15
menace

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Sydney, Australia

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when i check the GV-1 (which i dunno how to setup) it reads 'RPM 2080'
and i have the stock OS 50 which comes in the sceadu kit, with the 60L carby

pitch is +-10 in Idle1 and +-11 in Idle2

!boo!

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