RunRyder RC
 2  Topic Subscribe
WATCH
 1 page 830 views POST REPLY
Scorpion Power Scorpion Power
12-18-2003 05:45 PM  13 years agoPost 1
Dsim

rrNovice

Singapore

My Posts: All  Forum  Topic

Hi, i am new to CP. Just build up my Hornet II and was testing out the servos and radio setup. I am using the Airtronics RD6000. It was set to CCPM.

When i was testing the radio setup, the servos seems to move in the right direction, but when i throttle up or down, do not see any change in pitch, which i thought there should be. Please advise whether i am setting up my tx correctly... if the pitch does not change and headspeed still remain constant when throttling, how to take off??

Puzzled..

PM  EMAIL  Attn:RR  Quote
12-18-2003 06:21 PM  13 years agoPost 2
Eddi E. aus G.

rrApprentice

Gerlingen. Germany.

My Posts: All  Forum  Topic

Throttle doesn't need to affect pitch.

Pitch should affect throttle unless you have a governor or an esc with gov.

If there's no gov you'll probably want to program a throttle curve which is meant to keep rpm steady when you put load on the motor by applying pitch.

Did you fly FP before? Then your tx might be set to control throttle as primary function. In the CP world, the tx controls pitch and throttle together where pitch is the primary function. I'd say your tx is not set up for (e)CCPM correctly ...

Born to fly. Forced to work.

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
12-19-2003 12:24 AM  13 years agoPost 3
Dsim

rrNovice

Singapore

My Posts: All  Forum  Topic

I'm pretty sure that i have set the tx to CCPM. I have also input the throttle curve 0 63 71 89 100 and pitch curve 45 48 50 57 63. Any problem with this settings?
Thanks..

PM  EMAIL  Attn:RR  Quote
12-19-2003 06:24 AM  13 years agoPost 4
Eddi E. aus G.

rrApprentice

Gerlingen. Germany.

My Posts: All  Forum  Topic

There we have it. Your pitch curve is almost flat ... the possible range is from 0 (most negative pitch, say -2° to -4° for starters) to 100 (most positive pitch, say +9° for starters) with about 4-5° at the hovering point.

The curve around your hovering point (let's say around mid-stick for the beginning) allows for only 9 % of pitch change (48 to 57) and overall for 18 % of it's way.

The pitch curve for normal flying should be quite linear 0 ... 100 with the mid point adjusted so hovering is possible at mid stick (but within the mechanical limits of the head).

The throttle curve may be right, depending on your motor-esc-batt combination.

Born to fly. Forced to work.

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
12-19-2003 07:09 AM  13 years agoPost 5
Dsim

rrNovice

Singapore

My Posts: All  Forum  Topic

i am sorry, but could you explain to me what does the pitch curve, eg. 45 equate to pitch angle? 45 is referring to percentage i guess, but somehow i cannot understand the relationship to pitch angle.. please bear with me, i am still learning

PM  EMAIL  Attn:RR  Quote
12-19-2003 12:00 PM  13 years agoPost 6
Eddi E. aus G.

rrApprentice

Gerlingen. Germany.

My Posts: All  Forum  Topic

Well ... for example:

0 ... 25 ... 50 ... 75 ... 100 (whatever unit of stick position or servo travel)
or
(-)100 ... 0 ... (+)100 (on different transmitters the units may vary)

-9° ... -4° ... 0° ... 4° ... 9° (of AOA (angle of attack) of the blades)

Only thing is that you might want to set the negative pitch only to say -4° for starters, or even 0°, since a common newbie's reaction is to slam pitch down when in panic ... which will probably kill your heli with -9° and hovering some feet above ground.

Then you would have 4-5° (hovering AOA) at mid-stick (50 whatevers of stick position).

If you go aerobatic, you change your setup to have full pitch in both directions for normal AND inverted flight.

Born to fly. Forced to work.

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
WATCH
 1 page 830 views POST REPLY
Scorpion Power Scorpion Power
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Monday, October 23 - 12:32 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online