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Home✈️Aircraft🚁HelicopterCentury Radikal G20-30 N640 Hawk Predator › More Century Bashing Unfortunately
09-10-2006 05:52 PM  14 years ago
Syclic

rrApprentice

Northern Hemisphere Ont.

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I agree, treat the problem, not the symptom - do what is required to run cooler.

I just logged my 86th flight on mine with the same system and NO heat problems.

Be sure that you are not just tuning your main needle for a properly rich run, but that you are also tuning your HOVER/Idle screw for that also. I have more then enough power to even fly mild 3D with mine. SO either you are too rich or your throttle is not matched properly to your collective pitch.

I know of two others that I fly with occasionally with the same set up and they are also NOT having any heat issues.

P.S. Your excessive heat issue may be also caused by a damaged fan (missing a blade or two)...I would suggest that you check that.

Also maybe this should be listed under a different topic.

As I and others I know do not experience the excessive heat, we do not consider itb a "Century Bashing" issue. So I did not check this thread out to offer any advice until someone told me to.
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09-10-2006 05:58 PM  14 years ago
MikeInMobile

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Mobile, Alabama

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The only solution that worked with this exhaust setup was to bore an additional outlet into the muffler and weld a new LARGER nipple on. Once this modification was made, the muffler runs a lot cooler. The root issue is that the muffler is WAY too restrictive (a poor design)!
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09-10-2006 09:31 PM  14 years ago
DS 8717

rrProfessor

Here wishing i was somewhere else

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Gasoline engines will create more heat if you supply more gas,they are not like glow engines. Gas engines by nature run hotter than glow.DOUGYOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED
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09-10-2006 09:34 PM  14 years ago
SteveH

rrProfessor

Texas

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MR10X,

IF that were correct, it might be of concern if the engine in question was gas. It's glow. And, if you run a gas engine lean, the exhaust temp goes up, just like a glow.
The government cannot give you anything without first taking it from someone else.
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09-10-2006 09:48 PM  14 years ago
MikeInMobile

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Mobile, Alabama

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Gas engines run hotter because alcohol burns at a much lower temperature than gasoline. The problem is that the muffler gets hot, not the engine! The muffler temperature goes up because of the restriction to the exhaust flow. If the hot exhaust gasses cannot be expelled efficiently, the exhaust system will escillate in temperature.
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09-10-2006 11:28 PM  14 years ago
Ruger

rrNovice

Ellenwood Ga. USA

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heat problems
first off I did make a heat sheild . second of all maybe its supposed to get hot and melt things maybe Im over reacting right I should let it tear up stuff and crash then order new parts and do it again maybe Im missing the point.I beleive in preventing something before it happins thats why I am asking THE EXPERTS here
I know pictures are not to scale but my muffler is longer than the one pictured in the Century ad with the 47 it appears. also the fan is fine all blades intact and no restrictions.as for boring the muffler and installing a larger dia. outlet that is an option to get the gasses out easyier if I had the room I would wrap it with header insulation. It looks like I am going to have to make my own muffler I just thought a company that cared about its product would at least address the problem and they admit there are others with the same problem. I have had several people look at the set up and there is no problem there as a matter of fact heliheadcase set it up and it performs great,plenty of power hovers good no handling problems at all. Just the Heat.you are correct steve it is a glow and also you are correct about running it lean can someone give me the oal of their muffler and dia. just want to see if I might have a odd ball one.I'll keep trying till I get it .between all of us here I am sure it can be resolved one day I am going to make up an aluminum radio tray also that will prevent it from bending up and melting Thanks for the input guys
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09-12-2006 01:00 PM  14 years ago
SteveH

rrProfessor

Texas

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And this picture taken from your gallery, Ruger, shows the problem....an airplane engine without a heat sink head in your helicopter. This will definately run hot and cause the exhaust gas temperture to run hot.

The government cannot give you anything without first taking it from someone else.
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09-12-2006 01:08 PM  14 years ago
DS 8717

rrProfessor

Here wishing i was somewhere else

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And to really compound the problem,NO fan shroud. Even with a bigger head cooling will be very marginal.DOUGYOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED
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09-12-2006 01:25 PM  14 years ago
SteveH

rrProfessor

Texas

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MR10X,

Actually, the fan shroud is there. Granted, it's hard to see, as they don't come down too far. It's designed to direct the air onto a helicopter heatsink head, which of course, is bigger than an airplane head.
The government cannot give you anything without first taking it from someone else.
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09-12-2006 01:37 PM  14 years ago
beavis1

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New York state

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What Fuel
Not positive but
It also looks like there may be cool power airplane fuel in the tank.
That will add to the heat problem for sure !

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09-12-2006 02:47 PM  14 years ago
DS 8717

rrProfessor

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The shroud should cover the whole head,not just blow a little air at it.Pretty piss poor shroud,it amazes me how little effort some manufactureres attempt to keep an engine cool. Look at the Vigor and Vibe shroud,thats how it's done.DOUGYOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED
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09-12-2006 03:11 PM  14 years ago
SteveH

rrProfessor

Texas

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MR10X,

The small Century helis have a very efficient fan and works excellent with a helicopter engine...never is a problem. There's several schools of thought on this issue, and one is if you put the entire head in the schroud, it will actually impeed the flow of air. I've seen it happen on the old Concept 30's trying to use an engine that had a very big heat sink head...couldn't keep it cool at all. Normally that heli had a more than adequate cooling system. I have several small Century helis with engines all the way from OS 32's all the way up to OS Hyper 50's and none of them have any cooling problems. However, all are helicopter engines running helicopter fuel, and I frequently fly in 100+ temperature. I think your "piss poor" statement is uncalled for and obviously made with no information. Looking in your gallery, I can't see that you even own a Century heli...have you ever?
The government cannot give you anything without first taking it from someone else.
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09-12-2006 04:04 PM  14 years ago
DS 8717

rrProfessor

Here wishing i was somewhere else

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The attempt at a cooling should is very poor at the heli i'm looking at,i own a heli with the same poor attempt at cooling,an EVO 50.the only way to keep it cool is to run the engine too rich,which hurts power. Real air cooled engines in real aircraft use close fitting sheet metal to direct the cooling air over the cylinders and heads,porsche also does this with their air cooled engines. A sloppy fitting fan shround is inadaquate no matter what you say. A great fan is useless unless it can blow the air over the head to cool it,the fan shroud in that picture is a joke. I dont own a century for a good reason,and i'm not beyond bashing a helicopter i own either if it's needd. Your right there are several schools of thought on cooling but if you look at where it counts (in full scale aviation)you will see extensive duct work to direct air over the head and cylinders,DOUGYOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED
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09-12-2006 04:21 PM  14 years ago
SteveH

rrProfessor

Texas

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Doug,

I will not argue this with you any more on line, I will just say I've lost count of the number of small Century heli's I've owned and flown in the six years I've been flying them, and none of them have had overheating problems. What can you tell us about your experience with the Century heli's cooling system?
The government cannot give you anything without first taking it from someone else.
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09-12-2006 04:30 PM  14 years ago
Al Austria

rrElite Veteran

Sacramento, CA - USA

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Doug man,

My EMPIRICAL experience, as well as many others, reveal that the cooling system on the Century 30/50 machines is more than adequate. Remember, theory and reality are two very different things. It's foolish to assert that a design is inadequate unless you had experience with it, don't you think?
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09-12-2006 07:10 PM  14 years ago
Sea King

rrApprentice

England UK

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Got to agree I've never had a cooling problem on any of my Century Heli's either and yes I do run some in Fuselages as well LOL
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09-12-2006 07:18 PM  14 years ago
Gearhead

rrMaster

Vt

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""The attempt at a cooling should is very poor at the heli i'm looking at""

""the fan shroud in that picture is a joke""

Doug,, Doug, Doug, Doug Doug,,, you really should do some research before bashing something you know nothing about,,,,

what YOU DON'T know,,,
1) and you cant see in the photo, is the lower bottom of the shroud that SEAL'S around the bottom of the fan and shroud~ directing more air to the cylinder head than ANY other 30,50 heli on the market !! (see link below)

2) and you can't see just how large the fan really is,,

3) in 5 years I have been on RR this is the first over heating complaint that I can remember reading of on a Century 30 or 50,,

4) and if you look close, you can see the guy has the wrong motor in his heli !!,, or wouldn't you know ?

5) and there has been a few guys putting YS 61 motors in their Century 50's, withOUT having cooling problems,,

so with that I would have to say, that you really have KNOW idea just how efficient Century's 30"s and 50's really are at cooling,,Geezzz !! !!

http://www.heli-world.com/detail.aspx?ID=5419

buzz buzz buzz
Jim
Buzz Buzz Buzz
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09-12-2006 08:11 PM  14 years ago
DS 8717

rrProfessor

Here wishing i was somewhere else

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You need to do the research,start with looking at the cooling system on the Aurora,vibe,and the Synergy. The cooling shroud on the heli in the picture is pretty much worthless.DOUGYOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED
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09-12-2006 08:35 PM  14 years ago
flybarless

rrKey Veteran

Torrington, CT

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Hmmmmm Doug, seems like you have a lot of cooling issues.
I run a couple of Hawks and an Evo 50 with no cooling issues at all.

And since you feel the need to compare to the Synergy, My Evo was flown and tuned by Todd B. and after 4 consecutive tanks, we had no overheating issues or lack of power issues.
Just remember -- if the world didn't suck, we would fall off.
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09-12-2006 08:36 PM  14 years ago
Al Austria

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Sacramento, CA - USA

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The cooling shroud on the heli in the picture is pretty much worthless.DOUG
That's the most retarded thing I've heard in a while. My engine runs nice and cool with allot of power, so how do you figure?
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