RunRyder RC
 7  Topic Subscribe
WATCH
 1 page 2776 views
Scorpion Power Scorpion Power
HelicopterEngines Plugs Mufflers Fuel › OS 50 Hyper crank mod
10-21-2004 01:51 PM  13 years agoPost 1
marc8090

rrElite Veteran

Long Island, N.Y.

My Posts: All  Forum  Topic

For those of you running the OS 50 hyper, who has and has not done the crank mod of removing the webbing? I know it helped bearing life on the older engine. Any bearing problems yet with the new engine? Thanks guys!

PM  EMAIL  Attn:RR  Quote
10-21-2004 02:22 PM  13 years agoPost 2
rob10000

rrKey Veteran

Western​Massachusettes

My Posts: All  Forum  Topic

I've got the first gallon thru my Hyper. Unmodified and no issues yet.
I'll be a good test case 'cause I never run my engines dry, or use afterrun oil. In my defense, I store my gear in a low humidity environment, I use a castor/synthetic blend fuel, and none of my helicopters have the engine mounted with the crank vertical.
I do pull my engines at the end of the flying season, then inspect and pickle them.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-21-2004 04:09 PM  13 years agoPost 3
Darksider

rrKey Veteran

Derby United Kingdom

My Posts: All  Forum  Topic

i've modded my crank on my os 50 hyper, it's onto it's 3rd gallon now still going fine, i expect the bearings to last alot longer since i made this same mod to my os 50 sxh, and it made the bearings last alot longer.

Gareth

PM  EMAIL  GALLERY  Attn:RR  Quote
10-22-2004 01:57 PM  13 years agoPost 4
MSP765

rrApprentice

St. Marys, GA

My Posts: All  Forum  Topic

I have an OS 50 Hyper not even in the heli yet. What is this crankshaft mod you are talking about???

PM  EMAIL  Attn:RR  Quote
10-22-2004 02:27 PM  13 years agoPost 5
Garry-Boy

rrKey Veteran

Moscow, Russia

My Posts: All  Forum  Topic

Removing of the webbing...
here is the link:
http://runryder.com/helicopter/t74168p1/

Garry.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-22-2004 09:32 PM  13 years agoPost 6
mylee

rrVeteran

Rochester, UK

My Posts: All  Forum  Topic

I'm into my third gallon on my hyper with a modded crank. Running really sweet. Due to previous bearing problems with other engines, I stripped it down after approx 2 gallons. Just a small amount of surface rust on the bearing case, simply rubbed it off with my finger.

Just recently I've started adding 2% EDL oil to my 20% Wildcat fuel.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-23-2004 10:18 PM  13 years agoPost 7
marc8090

rrElite Veteran

Long Island, N.Y.

My Posts: All  Forum  Topic

Thanks for the answers guys. I guess I'll remove the webbing before I even install the Hyper. Seems like it can't hurt.

PM  EMAIL  Attn:RR  Quote
10-23-2004 10:34 PM  13 years agoPost 8
genovia

rrElite Veteran

N UR NECK OF DA​WOODS

My Posts: All  Forum  Topic

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2004 12:41 AM  13 years agoPost 9
docloc

rrApprentice

WI, Osceola

My Posts: All  Forum  Topic

Just a question on this mod. Isn't the crank balanced with the extra material that is removed ? I would think that removing materials would cause a vibration and shorten the life of the engine. Could the crank be mounted on a prop balancer and checked to see if is ?

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-24-2004 01:22 AM  13 years agoPost 10
tailrotordave

rrVeteran

Burbank, Ca

My Posts: All  Forum  Topic

Of course you can put it on a balancer, but it should seem obvious where the heavy spot is...........
cranks don't balance like props, fans, etc.
The webbing is very thin, almost like casting flash compared to the counterweighted end of the crank.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2004 01:30 AM  13 years agoPost 11
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

It's difficult in these small engines to create a crank counter balance that weighs too much when considering it offset weight of the piston and rod. Some mfg's have even been known to inset tungsten weight into the counter blance to increase its mass within the space constraints in the engine. If anything, taking out the web might improve the balance on the engine. I've yet to hear of anyone complain that the engine became less smooth post modification.

Ben Minor

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2004 09:37 AM  13 years agoPost 12
Darksider

rrKey Veteran

Derby United Kingdom

My Posts: All  Forum  Topic

if anything the engine vibrates less than it did before the mod for me, so i'd say it's likely better balanced for the rpm range i run it in, i've found that with both of the os 50's i've done the mod too.

Gareth

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2004 09:48 AM  13 years agoPost 13
Ashley

rrApprentice

London UK

My Posts: All  Forum  Topic

Got 11 gallons through my Stock Hyper and no bearing problems so far.

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
10-24-2004 12:06 PM  13 years agoPost 14
Garry-Boy

rrKey Veteran

Moscow, Russia

My Posts: All  Forum  Topic

My engine runs definitely smoother with that mod!

Garry.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-24-2004 01:44 PM  13 years agoPost 15
raptorheli2

rrElite Veteran

rip off britain and​no changing it

My Posts: All  Forum  Topic

sorry to go slightly off topic but are the hypers any better for fuel consumption or power over the old 50. i'm thinking about getting one but my 50 is going strong. if the hyper is more powerful (and i don't mean the 0.1 OS claim) when flying and the carb is better then i'll gt the hyper.

cheers


www.waterfoothelis.com

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-01-2004 09:00 AM  13 years agoPost 16
Jason WAI

rrVeteran

Hong Kong

My Posts: All  Forum  Topic

sorry to go slightly off topic but are the hypers any better for fuel consumption or power over the old 50. i'm thinking about getting one but my 50 is going strong. if the hyper is more powerful (and i don't mean the 0.1 OS claim) when flying and the carb is better then i'll gt the hyper.
I've tried it last Sat. It rocks ! Much better cooling than the standard OS50. Fuel Consumption is about the same , about 7 - 8 minutes a tank. The engine is still in the " run-in " process . About 1.75 turns main needle.

Appreciate to see the power improvement on this new engine, probably becuase of better cooling and larger carb.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 2776 views
Scorpion Power Scorpion Power
HelicopterEngines Plugs Mufflers Fuel › OS 50 Hyper crank mod
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Tuesday, November 21 - 11:21 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online