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Radio - Servo - Gyro - Gov - Batt > Radio question

Sceadu1
Senior Heliman
Location: Rochester,Minnesota

Can someone please tell me why it is so important to have a radio with 5 pitch and throttle curves. I have a Airtronics RD6000 Sport which only has 3 pitch and throttle curves but I've been looking into upgrading to a RD6000 super or a Hitec Eclipse 7. But before I do I would like to know if I really need it , is it worth the extra money I'll be spending?
I'am at a point where I'am starting into foward flight and would like to move into 3D s when I'am ready. So lets here your advice. Thanks

Jerry

04-30-2002 Over year old.

Remy
Senior Heliman
Location: Washington, D.C. - MHA Member

3 v.s. 5 points curve

Think about it this way : when you have to set up your curve for pitch and throttle, with 3 points, you can only set the bottom-stick, mid-stick and full-stick points. With 5 points, you have much more control over your curve, setting bottom, 1/4 stick, mid-stick, 3/4 stick and full-stick. If you don't use a governor, and/or have an engine with only 2 mixure needles (typically 30 size engine), then 5 points is not too much to setup your heli properly.

The setup you can do with only 3 points will be very limited. In a perfect work, 3 points would be fine. However matching the amount of throttle needed in any given situation with the amount of pitch in order to get good performance of your engine (without overloading the engine, or underloading it) can become really tricky, if not impossible. In real world will give you more flexibility.

Hope this helps,

Remy

Remy

04-30-2002 Over year old.

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arcpilot
Heliman
Location: So. Cal.

13 Point Curves

My Futaba 9ZHW has 13 point curves... Worth every cent I paid for the radio.

05-01-2002 Over year old.

Tday
Key Veteran
Location: Needham, MA

To amplify a bit on the point Remy made. With three points on pitch for 3D--you set, say -9, 0, +9. So far so good. You want to hover at 3/4 stick either way, say. Your throttle curve is 100, something, 100. The something (midstick) needs to be set so that you hover at 3/4--and that probably means it's about 25% on a Rap30 to get hover at mid-stick. Fine...but the problem is that the 25% is not really enough power at 0 pitch. When flying around, you'll find the engine would sag in the middle, while being fine above and below. If you then fix the 0 pitch point, you'll race at 3/4 stick in some situations...on it goes. With a governor, no problems, really...and the GV-1 doesn't require a separate channel beyond the throttle channel to work fine--so all's well with a governor.

Tom

05-01-2002 Over year old.

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Sceadu1
Senior Heliman
Location: Rochester,Minnesota

Radio question

Thanks for the quick reply's . So your saying that if I get a govenor I don't need to upgrade my radio? Whats a govenor sell for? What brand
to look for. Thanks again , Jerry

05-01-2002 Over year old.

Remy
Senior Heliman
Location: Washington, D.C. - MHA Member

I would upgarde the radio myself rather than getting a governor. But that's personal preference. A governor will control the engine RPM for you, and help keep it constant no matter the load you put to the engine. In that case, since the governor really takes care of the engine, your throttle curve is not as critical.

Remy

05-01-2002 Over year old.

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Tday
Key Veteran
Location: Needham, MA

Let me be Remy's tag team partner here again. A Futaba GV-1 sells for around $155 and I happen to like them no matter what the radio. It will fix the throttle curve issue, and as a result, the XP652 (I don't have the 662) works great. It does have limits still though which you might find annoying as you grow. 1) It doesn't have expo on the left stick, for example. 2) The governor needs to be controlled by the throttle stick--not by using the idle-up switch is another. From a practical standpoint the only issue I run up against with this set-up is that the governor overrides the throttle hold switch it seems (maybe I've not figured it all out on that one.) 3) There isn't a switch to control the gyro--switching between hh and normal mode. Is this a big deal? Not really if you just fly in hh, which most do. But some like to take off in normal, do ff in normal, and most everything else in hh.

So--there are limits. What's it worth? Personal preference, $ you want to commit to a radio (versus other heli things of course), and your flying will tell.
Tom

05-01-2002 Over year old.

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concept1
Key Veteran
Location: Youngstown, OH

Jerry,
you need to decide on what you want to do, if you are flying figure 8's inverted you probably "NEED" 5 pt curve. if you are just having fun doing loops, rolls, piro's and such, you don't "NEED" 5pts sure it may be nice, but you could also spend the money on fuel or something else. I fly 2 concept SRX's both on 3 pt curves, it took about 2wks of flying and adjusting AND modifying, but my pitch/ throttle curve is pretty dang good and I'd be better off getting the wife a new clothes washer than a new radio. but thats me. most of the guys around me really push for the new gear, but I let a guy fly mine and he decided it was ok.
just ask 2 questions of yourself
1> just what is it you don't like about your heli now
2> have you spent the time to test the problem ( made adjustments etc>)
. answer that and you will know when your ready

If you are just now into FFF, wait a bit for the radio, thats my advice
If you have the extra cash its better to be safe than sorry,but a good 3pt radio will still do pretty good.

05-06-2002 Over year old.

Sceadu1
Senior Heliman
Location: Rochester,Minnesota

Radio question

Concept1

What I would really like to do is fly 3D when I get good enough. I love watching those guys tear up the sky. I know of no other heli pilots around here so what i've seen of 3D is from video's I've downloaded from Runryder. I'd love to see it in person but all the fun flys are always so far away from where I live. i just bought a Hitec Eclipse 7 Helicopter radio and it should be here Thursday so I quess I'll have the five point curves know. Thanks for responding to my post and good luck flying.

Jerry

05-07-2002 Over year old.

JEFF_SE
Heliman
Location: Pittsburgh PA

Hmm 652

Tday: I have not had a 652 for a while, but if I remember correctly you CAN control the gyro with a switch. I generally set the guys up by:

Goto System mode (press both buttons and power up)
Find the Gear selector channel something like F E A (F =Flight mode, E elevator Dual rate switch or A= Aileron Dual Rate switch) Default is F. If your a beginner you can leave it there since you probably will not need an idle up setting as much as a swap on dual rates, if your Not a beginner than move to the E or A switch since you WILL want to control the gyro without changing flight modes.

I aslo seem to remember that the 652 does have expo ( the 622 didnt). My biggest complaint with the 652 was the 3 point curves. Got a 9Z now and do not miss the 622,652 8103's.

JEFF_SE

05-07-2002 Over year old.

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