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HelicopterGasser Model RC HelicoptersOther › new gasser??
12-31-2009 02:12 AM  7 years agoPost 61
James Kovach

rrKey Veteran

canton, oh - US

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Raja,

I have to ask this as it seems to keep coming up. Are you saying that in your video, your fuel is not sloshing around at all?

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
Let'r Rip Tator Chip

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12-31-2009 02:22 AM  7 years agoPost 62
rbort

rrProfessor

Franklin, MA - USA

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No

my fuel does slosh around, but remember the heli is in flight and some fuel slosh is expected. In the case of rccarguy's fuel, its more like a washing machine effect, splashing on the ceiling.

As he said, we did do a bunch of fixes and it made it a whole lot better, but the fuel tank was still "angry". I did shoot 3 videos of that but not as good quality as I was trying to zoom in from a distance. I can't post them unless rccarguy wants me to and gives me permission. What I shot is his property so to speak, so rccarguy unless you want to share that stuff I won't to respect your privacy.

-=>Raja.

MA 1005 Hanson 280, 4129 flts
Spectra 27 3DMax, 3187 flts
Whiplash V1 Hanson 300, 1425 flts
Whiplash V2 Hanson 300, 185 flts

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12-31-2009 02:30 AM  7 years agoPost 63
James Kovach

rrKey Veteran

canton, oh - US

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SO let me make sure I am clear on this.

You guys did some fixes on rccarguys heli. It no longer is vibrating the tail fins, tail rod or booms supports. Yet the fuel is still sloshing around "angry" so he must still have an unbalanced engine? And that is the only thing that could cause the fuel to slosh around like that?

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
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12-31-2009 02:36 AM  7 years agoPost 64
rbort

rrProfessor

Franklin, MA - USA

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Yes

The engine is definately one thing that can cause the fuel to splash angry aroud the tank.

If you have an engine that is even worse, it can part fuel like Moses with water...

-=>Raja.

MA 1005 Hanson 280, 4129 flts
Spectra 27 3DMax, 3187 flts
Whiplash V1 Hanson 300, 1425 flts
Whiplash V2 Hanson 300, 185 flts

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12-31-2009 02:38 AM  7 years agoPost 65
windy62

rrApprentice

USA

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He asked,
And that is the only thing that could cause the fuel to slosh around like that?
I think the answer your looking for is NO, it's NOT the ONLY thing that can cause fuel sloshing.

windy62

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12-31-2009 02:40 AM  7 years agoPost 66
rbort

rrProfessor

Franklin, MA - USA

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Probably better answered than me

Though I did put "one" thing that can cause...

Same meaning through yours is better said!

-=>Raja.

MA 1005 Hanson 280, 4129 flts
Spectra 27 3DMax, 3187 flts
Whiplash V1 Hanson 300, 1425 flts
Whiplash V2 Hanson 300, 185 flts

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12-31-2009 02:42 AM  7 years agoPost 67
windy62

rrApprentice

USA

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I see, so "Yes" and "no" are the same answer???

You answered YES to his question, when you actually meant No?

windy62

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12-31-2009 02:48 AM  7 years agoPost 68
James Kovach

rrKey Veteran

canton, oh - US

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So if the engine is out of balance and causing the fuel to slosh around all "angry" like, there would be no other signs of the engine being out of balance at the same time? And engine out of balance can be seen in the fuel tank only and not show up anywhere else?

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
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12-31-2009 03:08 AM  7 years agoPost 69
rilandtg

rrNovice

Waldorf, MD USA

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I want more of this conversation. I don't know much about being a hot shot rc helicopter pilot but the one thing I might be good at is HOVERING!!!!! I want to see videos of your fuel tanks with 1/4 to 1/8 of a tank left in them. Get a close up of that!!!!

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12-31-2009 03:13 AM  7 years agoPost 70
Billme

rrElite Veteran

MS

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rccarguy

If you have the engine experience you say, then fine, most I deal with don't...I personally think it easy to stick a ring using it, especially when you go to change oil.. I have seen a lot of stuck rings from guys using that stuff and during the Blue Marble fiasco.

I was asking to make sure you guys are checking all the bases, and to share my experience with it, so you can watch for it, thats all...

The hub test is simple, just land, and if it smooths out at at operating rpm when you relieve the load while running, you may have a hub problem ...
If you can focus on the bolts on the tail while in a hover with your eyes you should be ok...

This is not attempt to discourage folks from modifying their engines. It a point to be made for those who may not want to do it.. To compare this engine with anything Zenoah has done before is totally off base. I sure would not recommend this on a 26. G20 is a very fine well built engine that still stumps me for the power it makes due to the low timing, and low compression...The more I study this engine , the more I find out, which some folks need to do as well, if they are interested..
Bill

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12-31-2009 03:14 AM  7 years agoPost 71
rbort

rrProfessor

Franklin, MA - USA

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Vibrations

As I said before, a vibrating engine can show up in the fins besides the tank. A good tell tale sign on the bigger gassers like my 1005 was the horizontal fin tips buzzing to disappear. Changing just the motor made them stop.

Anyway, enough for tonight. But you should PM Bill and ask him how to tune your motor. I'm too tired to go into that now, but you can do better than just to tune it for high speed.

-=>Raja.

MA 1005 Hanson 280, 4129 flts
Spectra 27 3DMax, 3187 flts
Whiplash V1 Hanson 300, 1425 flts
Whiplash V2 Hanson 300, 185 flts

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12-31-2009 04:21 AM  7 years agoPost 72
Billme

rrElite Veteran

MS

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Raja, you going to let him borrow your muffler to do it? hehehe

you think I would let you get away with this?

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12-31-2009 04:47 AM  7 years agoPost 73
Billme

rrElite Veteran

MS

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Think long and hard on this one Raja

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12-31-2009 11:18 AM  7 years agoPost 74
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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Just a year ago, every manufacture turn their nose up at this engine, because they said it was to heavy, and no power..Remember that Chris Bergen, and Carey Shurley?
it is heavy.

I had absolutely no influence on whether or not MA produced a smaller gasoline model for the G20, they have invested in R&D where they thought it made the most sense for them.

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12-31-2009 12:52 PM  7 years agoPost 75
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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It sometimes pays to remember

That there are a lot of experienced helicopter owners out there that have a wealth of experience and success doing things their own way,they may for instance show up as a new member and not be a known name,but might have donkeys years of succesfull ownership but never get involved in these forums.I dont know sparx but it sounds like he has his own views and his own way of doing things for his applications.I dont see why people should be put to a "test", if its about who has the biggest boots thats a different matter.If an engine is tuned for your own style so be it.It goes without saying that not everyone here is green as far as engines go.

Team- unbiased opinion.K.I.S.S principle upheld here

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12-31-2009 02:53 PM  7 years agoPost 76
pgkevet

rrKey Veteran

Wales

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if its about who has the biggest boots thats a different matter
UK size 14

pgk

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12-31-2009 03:10 PM  7 years agoPost 77
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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pgkevet

is it true what they say about men with big hands and feet.

Team- unbiased opinion.K.I.S.S principle upheld here

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12-31-2009 03:49 PM  7 years agoPost 78
rbort

rrProfessor

Franklin, MA - USA

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What are you trying to say Bill?

The Zimmerman muffler is better than the Century one?

Well I'll tell you the Century muffler ran very nice for me in my Spectra and sounded really good, my only beef with it was that it leaked every so often and that bothered me having to wipe black oil spit around the exhaust area. There is a guy here with a Spectra-g that flies at my local field, and he's got the Century as I helped him setup his machine like mine. Edson will come to the field and say "Here Captain, fly it" and give me flights off his Spectra when he's here. It flies very well, granted, I set it up, and I tell him you go practice now with it. But I feel like he likes to see me fly it and what it can do, rather than do lazy figure 8's with it because he's still learning.

Anyway as you well know the zimmerman doesn't leak like that, at least for me I know some people are successful with the Century's, but I know you've also said leaks are intolerable and you must seal them so maybe you're acknowledging that the Century mufflers leak after a while as well.

In any case if anyone wants to get a zimmerman muffler they know where to get it, I've said before. I'm not parting with mine!!

Instead of this funny talk and calling it a foolish contest, what would really be productive Bill is if you would shoot some videos of your Radikal with the stock motor that you have, and also with your 2nd Radikal with the Hanson modified motor that I hand delivered to you in IRCHA. I know you said that the Hanson was smoother than the stock, but it will do good to show it here for people to see actual data as you got both machines there ready to go, and other Century pilots would be really interested to see what you can show.

Then everyone can choose for themselves what to fly, it really doesn't make any difference to me and you.

-=>Raja.

MA 1005 Hanson 280, 4129 flts
Spectra 27 3DMax, 3187 flts
Whiplash V1 Hanson 300, 1425 flts
Whiplash V2 Hanson 300, 185 flts

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12-31-2009 04:45 PM  7 years agoPost 79
James Kovach

rrKey Veteran

canton, oh - US

My Posts: All  Forum  Topic

I think what Bill is trying to tell you is, you know that Zimmerman muffler is tuned differently and is better off in the low and mid range whereas the Century pipe is tuned for Top End. And again, you cannot have your cake and eat it to. You either get great low end and an OK top end, or you get an OK low end and a great Top End.

What Bill is asking is, are you going to make it so this would be "all things being equal". Meaning, you wanna send me your pipe so I can have the same Tuning Range as you?

If not, this test would be inconclusive and irrelevant.

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
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12-31-2009 06:07 PM  7 years agoPost 80
imnxtc

rrVeteran

BC.Canada

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I have been following this "neener-neener-neener" thread for the relative entertainment value, for a couple of days now. Thank you all for I can always use some entertainment.

Don't get me wrong, there is a good bit of substance to be had earlier until it all became a bit "neener".

To cut through the crap, here is the summary of this thread for me:

1 - Vibrations can be caused by many different things, but sometimes one may tend to focus on the engine, when it may well be something else.

Sorta like talking of the foibles in one's neighbor's woman, so that we forget those in ours.

2 - All helis, or engines, (or wimmin' have some warts, we all seem to be more forgiving of those that are found in the brand we choose to fly, and to be much harsher on those found on others.

3 - Some helis (or woman) are great for the way one person likes to fly (???), while another may seem better for the type of flying his buddy likes to do.

4 - As we get older & more experienced in helis (wimin) we can more appreciate the value of them all.

So HAPPY NEW YEAR everyone, and may 2010 see more happy helis in the air.

And maybe it is time for the one who started this thread to close it.

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