RunRyder RC
 4  Topic Subscribe
WATCH
 1 page 581 views POST REPLY
HelicopterThunder TigerOther › Raptor 50V2 1st engine start
12-09-2004 12:19 AM  13 years agoPost 1
ACE21

rrApprentice

Las Vegas, Nevada

My Posts: All  Forum  Topic

Just finished building a Raptor 50 V2..and was just testing engine....Engine was running good so I added more power to get the mains spooled up pretty good and the nose started turning toward me(which I think is normal)..Question is, As I started to bring the power back the heli started wobbling pretty hard from left to right..like bouncing back and forth between the skids...Is this normal when main's are slowing down?..I didnt reduce power fast either just very gradually....Any input would be appreciated...Thanks....AJ

PM  EMAIL  Attn:RR  Quote
12-09-2004 12:20 AM  13 years agoPost 2
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

My Posts: All  Forum  Topic

On a hard surface? Normal

PM  EMAIL  Attn:RR  Quote
12-09-2004 12:22 AM  13 years agoPost 3
ACE21

rrApprentice

Las Vegas, Nevada

My Posts: All  Forum  Topic

On the street in front of house....

PM  EMAIL  Attn:RR  Quote
12-09-2004 12:22 AM  13 years agoPost 4
blockatvalpo

rrKey Veteran

Reston, VA

My Posts: All  Forum  Topic

Put the heli in grass and do the same thing, it won't vibrate as much. You still get a tad. If you are doing this on grass already, check the balance of your blades.

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 12:27 AM  13 years agoPost 5
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

My Posts: All  Forum  Topic

Also, grass or hard, more so on hard, if you dink around slowly putting in/taking out throttle/collective, helis are more prone to the wobbles. When you do start lifting off, just set it down, and pull the throttle back. Don't slowly ease it back.

PM  EMAIL  Attn:RR  Quote
12-09-2004 12:39 AM  13 years agoPost 6
Lozzyho

rrApprentice

Tropical Ayrshire, Scotland

My Posts: All  Forum  Topic

The nose should not turn unless:

a) You have a heading-hold gyro and you turned it around after you switched it on (i.e. it's trying to face where it was facing when you switched it on)
b) You don't have a heading-hold gyro and it's not set up right or
c) The gyro is mounted upside-down (only if it turned FAST)

Either way, until you can trust it, put on a training undercarriage. Saves money, believe me!


If your wings are travelling faster than your fuselage, you're in a helicopter, therefore unsafe

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 12:49 AM  13 years agoPost 7
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

My Posts: All  Forum  Topic

The nose may turn as the head is spooling up, because the tail isn't up to speed yet, and the hard surface has no traction. ACE, do fly from grass if you can.

PM  EMAIL  Attn:RR  Quote
12-09-2004 12:59 AM  13 years agoPost 8
Lozzyho

rrApprentice

Tropical Ayrshire, Scotland

My Posts: All  Forum  Topic

Fair enough, good point. Let the head get enough speed before floating the model.


If your wings are travelling faster than your fuselage, you're in a helicopter, therefore unsafe

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 01:03 AM  13 years agoPost 9
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

My Posts: All  Forum  Topic

And the traction of grass will help a lot. Lozzy, a heli on floats (on water) is real funny until the tail comes up to speed.

PM  EMAIL  Attn:RR  Quote
12-09-2004 01:05 AM  13 years agoPost 10
Lozzyho

rrApprentice

Tropical Ayrshire, Scotland

My Posts: All  Forum  Topic

LOL. I take your point. I wanna try that some time.


If your wings are travelling faster than your fuselage, you're in a helicopter, therefore unsafe

PM  EMAIL  GALLERY  Attn:RR  Quote
12-09-2004 01:56 AM  13 years agoPost 11
ACE21

rrApprentice

Las Vegas, Nevada

My Posts: All  Forum  Topic

Thanks for the inputs guys...WIll give it a try on the grass next week....Im glad we have grass thats not covered by snow...lol

PM  EMAIL  Attn:RR  Quote
12-09-2004 06:51 PM  13 years agoPost 12
Ringding

rrApprentice

Austria

My Posts: All  Forum  Topic

Also on a new head the ball links are still stiff so it vibrates more than normal. My R50 was a scaring look during its first spool up . It shook that much that the left skid swayed all the way to where the right one was when standing still, and the other way round.

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 581 views POST REPLY
HelicopterThunder TigerOther › Raptor 50V2 1st engine start
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Tuesday, January 23 - 10:18 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online