RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 666 views POST REPLY
HelicopterCentury Radikal G20-30 N640 Hawk Predator › Itttt's aliiiivvve! It flyyyyys!!
05-09-2005 02:11 AM  12 years agoPost 1
gamegeek

rrApprentice

Richmond, Kentucky

My Posts: All  Forum  Topic

Thanks to many people here, I got my Predator in the air today. It still needs some tweaking but I figured it was close enough for a little hovering.

The only slight problem I had was the heli all of a sudden jumped into the air a few feet. When I would land it, I would slowly bring it down and it would suddenly drop to the ground. The other thing it did was I was doing a climbout at about 3/4 throttle. It suddenly seemed to bog and start dropping. It was fine when it was hovering. Is it just not broken in enough to have the power to climb?

The only thing I can figure is that it was the Revlock with gator. I haven't set it up yet but from the instructions I sounded like I could disable it by pressing the set button before starting it. I'm probably wrong on that.

From the instructions of the Revlock, can you only have two rpms set? A&B? So if you want to be able to turn it off, you can only have one rpm set? I'm sure I've got this wrong somehow.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-09-2005 05:28 PM  12 years agoPost 2
jackheli

rrProfessor

Vancouver - Canada

My Posts: All  Forum  Topic

Do not turn the governor on when you are breaking an engine in.

Go with your transmitter curves so you will have better control and understanding of what is going on.

This is also true if you are setting needles or top and bottom max pitch. The governor will mask the results of your settings and could do some unexpected things when trying to maintain constant RPM on a less than ideal system.

Were you flipping the idle-up switch when the heli jumped?

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-09-2005 05:46 PM  12 years agoPost 3
Darksyde

rrApprentice

Chur, Switzerland.

My Posts: All  Forum  Topic

True Jack, and to add to what you said... Using a governor when the engine is break-in rich will cause your throttle to 'hunt' and you will never be able to lock in a steady rpm. As Jack suggested only use your governor after an engine is broken in and the mixture has been leaned out to the final operating mixture. If you heli is jumping into the air upon landing, I would suspect that you have different pitch curves in your modes perhaps. For myself I find having the pitch curves identical in all my modes including hold is best, you will never be surprised when switching modes.

Karl.

Go Bling or Go Home!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
05-09-2005 10:43 PM  12 years agoPost 4
gamegeek

rrApprentice

Richmond, Kentucky

My Posts: All  Forum  Topic

I have my pitch curves the same right now. -4 to +10. I didn't switch between modes anyway.

I wasn't wanting to use the governor, I just had it installed and was trying to make sure it was off. I think it might have actually been working somehow.

James has mentioned using a governor to "sing" the headspeed you want (1800) by turning it on for a second and then you can adjust your throttle curve. So, using the governor instead of a tach.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-09-2005 11:52 PM  12 years agoPost 5
Darksyde

rrApprentice

Chur, Switzerland.

My Posts: All  Forum  Topic

again that will only work if your mixture is perfectly tuned in. If your too rich your governor won't be able to lock in on an rpm. You should always try and set up your heli without a governor in all flight modes first. Only when your heli is broken in and the carb is dialed in to the proper post break in settings, should you think about a governor. If your heli is set up to fly well without a governor, then if anything ever happens to the governor you'll still be able to fly and land....

Karl.

Go Bling or Go Home!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
05-10-2005 03:39 AM  12 years agoPost 6
gamegeek

rrApprentice

Richmond, Kentucky

My Posts: All  Forum  Topic

Well, I finally figured out how to get the gov. setup where I could turn it off and on.

I go out to the field and get ready to start. My pull-start breaks! My airplane starter won't turn the motor over.

Anyone have the same experience? I wonder if Zenoah will replace the broken part?

PM  EMAIL  GALLERY  Attn:RR  Quote
05-10-2005 04:27 AM  12 years agoPost 7
AGRAV8

rrProfessor

Mosquito Coast......Houston Texas

My Posts: All  Forum  Topic

I know what to do.......

I ordered some METAL pull rings from BHHANSON.com and that solves the problem with broken pull start rings. PERIOD.

Put them in all 3 pull start setups for my Predators. I would call Bruce tomorrow and get me one sent out.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-10-2005 12:39 PM  12 years agoPost 8
gamegeek

rrApprentice

Richmond, Kentucky

My Posts: All  Forum  Topic

Perfect James!!! I'll have one ordered today!

Just wondering if I have my governor set right. To find out what engine rpm you need you multiply your gear ratio and the headspeed you want right? So mine is 88/13 which I think is 6.7. 6.7*1800 headspeed equals 12,200 rpm. Right?

I'm also noticing that my swash doesn't move equally sometimes. I think it's fine when moving the collective but if I hold an input (like full elevator), it will change a little bit as I move the collective up and down. I remember reading about this but I can't find the post.

Thanks,

PM  EMAIL  GALLERY  Attn:RR  Quote
05-10-2005 04:39 PM  12 years agoPost 9
TWOWHEELTOM

rrApprentice

Yelm, WA

My Posts: All  Forum  Topic

If you are using ccpm, DO NOT level your swash plate with sub trims, turn on the heli, make sure your pitch curves are straight (0-50-100) put the controller at 50% then go though and correct the control rod lengths to make everything square and at 90 degrees. An easy way to tell is to have your blade pitch at 0 degrees at half stick, with no pitch adjustments or sub trim. If you try to use sub trim, it will mess up the ccpm and make certain corners of your swash change level through the travel. Dont ask me how I know this.....you might even be looking for my old post.... Good luck!

PM  EMAIL  Attn:RR  Quote
05-10-2005 05:54 PM  12 years agoPost 10
jackheli

rrProfessor

Vancouver - Canada

My Posts: All  Forum  Topic

You can use up to 40% subtrim if your atv's are at 100%. To level the swash on the corners apply up to 5% atv on one side of the travel only, in order to level the swash at the ends.

You may want to take a look at:

http://www.runryder.com/helicopter/t49753p1/

and

http://www.runryder.com/helicopter/t45511p1/

If you are using metal horns or other types of single arm horns it is impossible to avoid subtrim.

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 666 views POST REPLY
HelicopterCentury Radikal G20-30 N640 Hawk Predator › Itttt's aliiiivvve! It flyyyyys!!
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Tuesday, January 23 - 8:02 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online