RunRyder RC
 2  Topic Subscribe
WATCH
 1 page 486 views POST REPLY
HelicopterAntiques or Out of Business › Cricket Blade Pitch
01-14-2011 05:00 AM  7 years agoPost 1
ch-47c

rrElite Veteran

san jose, ca

My Posts: All  Forum  Topic

I am almost finished with my Cricket restoration. Just fuel tank, T/R linkage, and main blade pitch adjusted.

Somewhere I've read don't use a conventional blade pitch gauge, because it will give a false reading as opposed to the fabricated wire gauge in the GMP Bulletins. Is there any truth to this or is it a bunch of hooey? Also, what rpms are you guys running?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2011 05:52 PM  7 years agoPost 2
Wozza_au

rrNovice

Adelaide South Australia

My Posts: All  Forum  Topic

Hi
Nope thats correct a normal pitch gauge will give you a false reading due to the flat bottom blades.That said it can still be used to check both blades are the same and to be fair its a bit of trial and error anyway.
RPM from memory is around 1600 rpm but that was for the rebel which has larger blades.
Wozza

I see dead pixels

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2011 08:19 PM  7 years agoPost 3
ch-47c

rrElite Veteran

san jose, ca

My Posts: All  Forum  Topic

Okay, that's what I figured. Would you add 4 degrees to what you have as a base datum to start, then twist the grips/metal plates with 2 Cresent wrenches to get the desired rpm. That's what I did many years ago, but couldn't afford a pitch gauge or tach.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-15-2011 02:19 AM  7 years agoPost 4
Wozza_au

rrNovice

Adelaide South Australia

My Posts: All  Forum  Topic

Hi
use your standard pitch gauge(Im assuming you have one )
set it to about 5 deg...
It really depends on your motor,pipe nitro content and throttle curve but aim for light on skids just coming off the ground at between 1/4 to 1/2 throttle
if she bobs her head,to much pitch,if not getting airborne till between 1/2 to 3/4 throttle, to little pitch...due to all the different combos its really a trial and error thing...also remember to keep an eye on engine temps.
Wozza

I see dead pixels

PM  EMAIL  GALLERY  Attn:RR  Quote
01-15-2011 04:17 AM  7 years agoPost 5
ch-47c

rrElite Veteran

san jose, ca

My Posts: All  Forum  Topic

Yea I have 4, now that I have good job Got all that down. It's been 25+ years since I tweaked a Cricket. I remember adjusting blade pitch with wrenches and not links.

Thanks All!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 486 views POST REPLY
HelicopterAntiques or Out of Business › Cricket Blade Pitch
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Sunday, January 21 - 8:29 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online