RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 947 views POST REPLY
11-07-2004 01:41 AM  13 years agoPost 1
metalman

rrApprentice

ada, okla.

My Posts: All  Forum  Topic

Learned something about my OS 37 in my Caliber 30 today. I have run this engine only a gallon or so, but had very poor luck tuning it. If I left the idle screw set to factory adjustment, the needle would have to be closed down to less than 1 turn open to get airborne (actually about 3/4 open). This spooked me about maybe roasting my new motor when whatever was causing the overrich condition went away, if it ever happened too. I leaned the idle out so I could richen the main but the transion was poor and so was the top end power.
Anyway, I was sitting at the bench, looking at the thing when I remembered I had to make a new hole in the canopy to reach the needle( I use a full canopy). It finally dawned on me that the needle is about 10mm lower in the airframe than the TT39 that it replaced. I disconnected the Uniflow system that had straightened out the TT39 tuning problems and just hooked up the stock system. WOW!! This thing has got some piss and vinegar for power! I backed the throttle curve down to 80 % at max to keep from overspeeding the head(9 1/2 degrees pitch).
Do any of you guys know if there is a longer boom and belt available for the Cal 30? Maybe 575 or 600 blades would be about right for this engine.
Jim

PM  EMAIL  Attn:RR  Quote
11-07-2004 02:13 AM  13 years agoPost 2
HAT

rrApprentice

OC California

My Posts: All  Forum  Topic

Jim

Trim corp carries upgrade for caliber; boom, belt and engine mount.

Here's the link http://www.ishiimokei.com

Sponsored by: American Express

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 02:37 AM  13 years agoPost 3
TMoore

rrMaster

Cookeville, TN

My Posts: All  Forum  Topic

The Uniflow isn't needed for the 37 and you should be fine with 550's on the mains. What headspeed are you running upstairs at full throttle?

TM

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-07-2004 02:40 AM  13 years agoPost 4
metalman

rrApprentice

ada, okla.

My Posts: All  Forum  Topic

Cal 30 upgrade
HAT--- Thanks for the reply---- but I can't get anything in the posted site. I can get into the site, but can't find any Cal parts.
Jim

PM  EMAIL  Attn:RR  Quote
11-07-2004 02:43 AM  13 years agoPost 5
metalman

rrApprentice

ada, okla.

My Posts: All  Forum  Topic

TM--- I was alone today, so no way to tach the head, but I ran 1800-1850 with the TT39, and the OS is spinning it a lot faster than that.
Jim

PM  EMAIL  Attn:RR  Quote
11-07-2004 02:51 AM  13 years agoPost 6
TMoore

rrMaster

Cookeville, TN

My Posts: All  Forum  Topic

We typically run the Cal with the 37 at 2000 upstairs wide open. 1850 in the hover sounds right. I had a TT39 in mine and it ran great up until I got the 37, in fact the TT was running fine when I pulled it out. I have 5 gallons through the 37 and it runs great, like a mini C-Spec.

You could put a long boom on it but it will run the 550's fine.

TM

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-07-2004 03:53 AM  13 years agoPost 7
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

Depending on nitro and exhaust, the 37 supports over 10 degrees of pitch in the 1900-1950 rpm range with 550's. I've seen no indication that a good set of 550 blades won't adequately harness the engine's power, i.e. no unexpected overspeeding, overheating, or excessive pitchiness in FFF from high pitch angles at WOT in FFF.

Ben Minor

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 04:30 AM  13 years agoPost 8
HAT

rrApprentice

OC California

My Posts: All  Forum  Topic

Jim

Here's another link:

http://www.updaterc.com

Under search, type: caliber conversion
Hope this help.

Sponsored by: American Express

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 12:27 PM  13 years agoPost 9
Rcer22

rrVeteran

Somewhere In The Adirondack Mountains

My Posts: All  Forum  Topic

OS 37 on the Raptor 30 V2
My self and a friend drove out to Penn yesterday with the idea of buying a couple of 37s for our Raptors. When we got there the guy in the store told us of problems with the main gear striping and loosing teeth. He also said the motor would overspeed. Anybody had any problems like this to tell of?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-07-2004 03:11 PM  13 years agoPost 10
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

I've never, ever heard of that kind of problem. I presume it is an isolated incident, and it is certainly not a reason to avoid putting a 37 in your model.

Ben Minor

PM  EMAIL  GALLERY  Attn:RR  Quote
11-07-2004 03:37 PM  13 years agoPost 11
TMoore

rrMaster

Cookeville, TN

My Posts: All  Forum  Topic

Utter nonsense. There are two Rap 30's flying here in Cookeville with 37's and TT mufflers and they run fine.

TM

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-07-2004 07:59 PM  13 years agoPost 12
hoverking

rrKey Veteran

Tennessee

My Posts: All  Forum  Topic

i would guess poor maint. practices o.s.37's running in almost everthing at our field with not one problem

my 2 cents

PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2004 02:20 AM  13 years agoPost 13
metalman

rrApprentice

ada, okla.

My Posts: All  Forum  Topic

Cal 30 and OS 37
TT and Dr. Ben---- I was able to tach the head today and with 10 1/2 degrees of pitch ( Vario gauge ), SAB 550 symmetrical blades, SB 5 Hatori muffler, 15% power Master fuel, 65 degree air temp, engine was holding 1950 head speed. After a slow start with this engine, I've become well satisfied with it. Thanks for everyones input.
Jim

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 947 views POST REPLY
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Saturday, June 23 - 2:00 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online