RunRyder RC
 4  Topic Subscribe
WATCH
 1 page 695 views
Scorpion Power Scorpion Power
HelicopterCentury Radikal G20-30 N640 Hawk Predator › hawk sport low performance
10-25-2004 12:59 AM  13 years agoPost 1
RICH.L

rrKey Veteran

east springfield​p.a.

My Posts: All  Forum  Topic

hey everyone,i have a strange problem with my hawk sport.
i used to run mavrikk pro c/f blades but due to a lack of funds and being close to winter i went with the woodies.
i can fly ok with the wood blades but i have very,very poor lift.
i have not changed any throttle or pitch curves.
i tried to do a roll and almost crashed,the engine does not over-rev nor does it bog out.
i tried adjusting the carb,different glow plug and it still runs the same.
it has great idle quality and if i pinch of the line to the carb it dies after 3 to 4 seconds.
this was the weekend i was going to go all out and try to hover inverted before winter hit.
could my os32 be dying after two years and 16 gallons?
if i run in idle up 2 at 1800 rpm and nail the throttle and collective it very slowly rises,but i hear no major bog or over-rev,any ideas?
rich

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2004 01:12 AM  13 years agoPost 2
Jgiang

rrVeteran

Raleigh, the city in​the park.... :)

My Posts: All  Forum  Topic

each blade will have different pitch. i would recheck the pitch again. i would recheck the picth everytime I bold on a different set of blade. Just my 2 cents.


It was in the air, but now it's on the ground. :)

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2004 01:57 AM  13 years agoPost 3
Ray Fernandez

rrElite Veteran

Guam (U.S.A.)

My Posts: All  Forum  Topic

collective it very slowly rises
How old are your batteries? Have you noticed any loss of power there? You mentioned that the collective is slow, so I am wondering about the life of your battieries.

Ray Fernandez - GUAM

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2004 02:18 AM  13 years agoPost 4
SteveH

rrProfessor

Texas

My Posts: All  Forum  Topic

Rich,

No blade change should give the results you are talking about.

Why did you change blades? Was it a result of a crash? Did you also disassemble the rotor head and possibly replace the feathering shaft?

If so, you may have installed the shaft washer wrong which will tend to lock the collective pitch when the rotor is at speed.

The government cannot give you anything without first taking it from someone else.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2004 03:14 AM  13 years agoPost 5
Gearhead

rrMaster

Vt

My Posts: All  Forum  Topic

a couple other things, the wood blades can be heavier or even lighter than the carbon blades, that could do it, or 1 of the woodies could have warped some if they sat around a while,,, but I'm more apt to believe you need to bump your curve.


Jim

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2004 01:03 PM  13 years agoPost 6
RICH.L

rrKey Veteran

east springfield​p.a.

My Posts: All  Forum  Topic

would i want less pitch on top end with woodies or more pitch?
i did crash with my c/f's and yes i did replace mainshaft,feather and flybar shafts.
i already pulled it apart and all washers are where they should be.
this problem has been bugging me for some time now,and yes it has all been after my recent crash.
the woodies were used that i got when i bought a bunch of used hawk parts.
originally i had the pitch wrong on one of the blades,i readjusted them and about two weeks ago i had it out and it was about the sane.
i can get it to climb to about 150 feet,but it just takes ay too much time.
and i have no climbout power so i am afraid to try anything.
when i tried to roll it took forever to get back upright.
rich

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2004 02:00 PM  13 years agoPost 7
SteveH

rrProfessor

Texas

My Posts: All  Forum  Topic

Rich,

Specifically, double check the washers that are under the nuts on the ends of the feathering shaft. The small washer goes on FIRST and then the large washer. If you reverse them, and it seems they should go that way, the performance will be just as you discribe because the outer bearings in the blade grips will be draging on the large washers, causing the collective pitch change and cyclic pitch to drag when the head is at speed.

The government cannot give you anything without first taking it from someone else.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-25-2004 10:11 PM  13 years agoPost 8
RICH.L

rrKey Veteran

east springfield​p.a.

My Posts: All  Forum  Topic

well i pulled the feathershaft again,all the washers are in the proper place(small one first then the larger one)
i didn't think that was the problem because i have replaced this shaft many times and always take special precaution to that part.
i checked my pitches in idle up 2(-10 -5 0 +5 nd +10)
i did find that i was not getting full throttle on my throttle servo,i was off by about and 1/8 to maybe 3/16 inch from full travel.
i used my epa to get that right.
i don't know why that would be off?
i will test it out and let you know if it helps.
rich

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2004 04:13 AM  13 years agoPost 9
Squid

rrNovice

Montana

My Posts: All  Forum  Topic

I know on my Hawk it climbs a lot faster with my carbons on than it does with my stock woodies. I thought at first it was just me, but even a friend of mine commented on that.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2004 05:17 PM  13 years agoPost 10
RICH.L

rrKey Veteran

east springfield​p.a.

My Posts: All  Forum  Topic

that could be,i haven't flown wood blades since january of this year.
i kind of forgot what they fly like.
not only that but back then i was just flying around,it wasn't until i got thec/f's that i started looping it and rolling it.
i really don't want to put any more money into the hawk as i am building a raven fifty.
i was told that it would be too hard to fly them both seeing that one is normal linkages and the other is ccpm.
is flying one with ccpm way different in flight?
rich

PM  EMAIL  GALLERY  Attn:RR  Quote
10-26-2004 05:47 PM  13 years agoPost 11
marked23

rrKey Veteran

Lynnwood, WA

My Posts: All  Forum  Topic

Wow, I have the opposite experience.

My woodies get better lift/pitch than my maverriks. I crashed my maverricks and have been flying woodies since... But I still wonder if I was doing something wrong with my picth curves... and have bought another set of the maverricks. So, I'll have to try them again.

Also, I was seeing that the carbon blades need a different thrttle curve. If I am set up for woodies, then switch to these carbon blades, I saw that my head speed was way to high. I needed to dial back my throttle. And then I didn't see the lift I expected.

-Mark

PM  EMAIL  Attn:RR  Quote
10-26-2004 06:07 PM  13 years agoPost 12
RICH.L

rrKey Veteran

east springfield​p.a.

My Posts: All  Forum  Topic

it was reccomended to me that i copy my hawk on my radio and set up one throttle curve for woodies and one for c/f's.
what part of the throtle curve do you change?
i like running in idle up 2 with -10 to +10 pitch,would you adjust 1/4 and 3/4 curves,seems to hover great, just slow on full pitch/collective.
rich

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 695 views
Scorpion Power Scorpion Power
HelicopterCentury Radikal G20-30 N640 Hawk Predator › hawk sport low performance
 Print TOPIC  Make Suggestion 

 4  Topic Subscribe

Sunday, November 19 - 1:26 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online