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HelicopterEngines Plugs Mufflers Fuel › OS Hyper 50 NOT failing
01-23-2007 09:05 AM  10 years agoPost 41
Rui_JC

rrVeteran

Portugal

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How about Klotz oil ?

I heard that is very good.

This is the one i've been addding in my fuel.

.

Keep it up...literally

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01-23-2007 01:07 PM  10 years agoPost 42
supertigre

rrApprentice

Castle Rock, Colorado

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Wasp, I never said that castor ws the cure-all, only that people who run some castor seem to have less problems.

Still Tryin, Yes, your muffler will get hot. I have quite a few engines that ran castor blends and remained shiny and clean. It all depends on how the engine is used and whether you get burned residue on the outer parts.

Paul Mcintosh
Owner-CRCustom.com - custom vinyl lettering, banners, signs

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01-23-2007 01:08 PM  10 years agoPost 43
supertigre

rrApprentice

Castle Rock, Colorado

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Rui,

Some Klotz oils have castor in them. Overall, Klotz makes some very good oils.

Paul Mcintosh
Owner-CRCustom.com - custom vinyl lettering, banners, signs

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01-23-2007 01:13 PM  10 years agoPost 44
Climax

rrVeteran

West London, United Kingdom

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My Hyper is about 2 years old, flies at the weekend and most summer evenings.

So far no bearing problems, although I am planning to replace the it as part of my routine maintenance schedule some time soon before the summer.

I run it on 30% Coolpower (low viscosity oil) and use a Zimmerman muffler (Mild 3D, Raptor 50SE running a 2000RPM head speed). I would estimate that the engine has burnt over 30 gallons.

After my last flight I burn out any remain fuel, and then while the engine is still hot I turn the crank clockwise just into compression. This closes up the exhaust and carb ports preventing any moisture from getting in - well that's the theory anyway.

It's quite possible I've been lucky with my engine...

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01-24-2007 03:46 AM  10 years agoPost 45
helinutz2

rrApprentice

Medicine Hat, AB Canada

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20 Gallons Coolpower 15%. Absolutely no issues......yet.

Rave 90 ENV / Radikal E640 / Rush 750 / Trex 600N
Team No WhinerS, Team Renegade R/C Heliflyers

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02-16-2007 06:42 AM  10 years agoPost 46
Mputu

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Killeen, TX

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Does anyone knows how to get the rear bearing out? need some help, any input will be appreciated.

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02-16-2007 07:15 AM  10 years agoPost 47
BigBobby

rrApprentice

Yass NSW Australia

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Take everything out up to and including the crankshaft so that all thats left is the crankcase and bearings. Preheat the oven to 160 deg C and stick the crankcase in there. Leave for 10 minutes and then remove and bang the case on to a phone book so the bearing is ejected out. It may take a few cycles of heat and bang but works.

A few helis, this and that

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02-16-2007 07:30 AM  10 years agoPost 48
nivlek

rrProfessor

Norfolk England

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My 50 has done two seasons flying on its original bearings . It started life as an OS50SXH , then had a Bellwood Head for a month , then the Hyper head last season along with an OS70 carb . It has been run on Supaglo straight and (mostly) Supaglow 10% . This fuel contains 16% synthetic and 4% castor .

At the end of the day , it gets dark .

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02-16-2007 12:11 PM  10 years agoPost 49
firefox

rrApprentice

Thailand

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My Hyper is developing a sound from the motor again. I'm guessing the bearings, since it's a similar sound to when they failed before. It was less than 1 gallon before the original bearings failed. It's been a little over a gallon more after I replaced the bearings (yeah, I don't fly much, but usually at least a couple times a week). Using the same fuel I used with no problems on my TT50 for around 8 gallons.

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02-16-2007 01:19 PM  10 years agoPost 50
Rui_JC

rrVeteran

Portugal

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Hi guys,

After all these posts i can almost conclued safely that the bearing issue of the hypers appears mostly in cases where:

1- using fuels with 30% nitro
2- flying the engine with the needle tight demanding power and RPM
3- burning the fuel inside the engine at the end of the day

I guess that most flying 3D ( meaning high RPM and/or high nitro ) will have bearing issues sooner !

please let me know of your ideas about this...

.

Keep it up...literally

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02-16-2007 03:47 PM  10 years agoPost 51
JR4EVER

rrApprentice

Norway

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Hi! me and my flying buddies have 8 os hypers,one of them have run over 40gallons of fuel in the past two years,changed the bearing one time and using 1850rpm headspeed. we had problems then vi started too use 30% nitro,then vi changed back to 15% no broblems at all.

We have our own fuelbrand here in norway: JERO COMPETITION 15/15 ,But two of them using coolpower15.

Less nitro longer engine life

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02-18-2007 05:45 AM  10 years agoPost 52
firefox

rrApprentice

Thailand

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Then I'm probably not in that criteria, since I:
1. Use 15% Cosmo heli standard fuel
2. Was just running in the heli, fairly rich and only warm, not hot
3. Usually leaving some fuel in the subtank at the end of the day

I also do only mild flying since I'm not a big fan of 3D.

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02-18-2007 09:34 AM  10 years agoPost 53
bdtrauma

rrNovice

Redding, CA

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bearings

I have the hyper50 with mavrik pipe using CoolPower 30% and after probably 12ish gallons I heard a rattle and just rebuild engine changing bearings etc... rear bearing does feel rough when I spin it. maybe time to switch to 15%...? kudos to RC Heli's recent rebuild article... was very easy to follow for a newbie.

Bert

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02-22-2007 08:37 PM  10 years agoPost 54
arceye

rrVeteran

UK

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Quote
I think the humour in my previuos post was missed maybe.

Bob,

Some folks , specially here on RR , can be pretty "thick".....

Can you please share your setup with us ? Fuel, exhaust system, etc ?? What is your procedure after flying ?? Run it dry, leave it be ??

Thanx
Bobs set up is most likely build heli, fuel it up and test fly it ( hover it around for a bit )then leave it for a year while he goes off round the world to many displays and events not fogetting the paragliding he does, then come back to it a year later and say " damn these bearings have lasted a long time "

Only joking Bob

Andy


Kasama Head :(
The Blingiest DOWNGRADE a Raptor can have

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02-22-2007 09:33 PM  10 years agoPost 55
Tyler

rrElite Veteran

Chicagoland area

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No failures

I ran a non-hyper OS 50 and and OS 70sz-h for about 70 gallons each with no problems. I finally pulled them when the rings wore out and decided the bearings sounded a little rough. I used 30% coolpower and various large volume mufflers.

Stupid OS engines!! I never get a chance to try something new because they won't break down!!

Tyler

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HelicopterEngines Plugs Mufflers Fuel › OS Hyper 50 NOT failing
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