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HomeVendor Promoted Content › TRM VX231RS , Radikal 30
10-18-2010 03:51 AM  8 years agoPost 21
windy62

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USA

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My ONLY affiliation is with Century as a Field Rep.
Finally the truth comes out...

windy62

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10-18-2010 04:00 AM  8 years agoPost 22
Eury

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Dover NH

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He never hid it. I remember him announcing it on Inside Heli months ago.

Nick Crego

Citizen #0168

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10-18-2010 12:53 PM  8 years agoPost 23
KopterKat

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New Jersey

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Can't say that I agree with that assessment KopterKat. A Gasser can be no different than a Nitro provided you take your time. Rush into a Nitro heli and you can have the same issues you would with a Gasser. The obvious difference, there are more "resources" for you to pull from when it comes to Nitros as just about everyone will be able to find someone locally to help them out.
Helicopter assembly and airframe setup are the same, but that's where it ends. The bottom line is this. Do what you want, buy what you want, and the enjoy in the hobby. Remember every resource isn't credible. There's more than 4 ways to do everything,and be very patient.


FlipMode Squad

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10-18-2010 03:04 PM  8 years agoPost 24
Dr. Fibinotchi

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Sioux Falls SD

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well done.
Promoting gassers should be the valid argument. Most that fly helis in general will not use the last droplets of power all of the time. Most cannot appreciate the diffrences in engines either.

If we are honost a more vetranized person would agree it takes more attention and more effort to get it flying right and everything happy. Its certainly possible, but a new guy a 50 class nitro is so easy in comparison and would give him quantum leaps in his learning curve to get a handle on how evertyhing works. Agree..Instead of 40 ways to do things there is much less.

-C

If you want others to be happy, practice compassion. If you want to be happy, practice compassion.

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10-18-2010 04:32 PM  8 years agoPost 25
Billme

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MS

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I'm not finished with the 30..Its still doing good for me..Alan has always had a strong 231..I have always been in this to make the gasser the best they can be. When someone does something that is good for gassers, I'm going to compliment them.
The guy flying is doing good, don't know him, but like most nitro pilots, he is not use to the torgue of the gasser...Give him a few days, and he will master it..This is not rocket science
Buy and fly what you want, and keep the devil out of the details..

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10-18-2010 05:01 PM  8 years agoPost 26
Justin Stuart (RIP)

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Plano, Texas

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How smooth is the 231 in the video? Smooth enough to use with a FBL setup?

You're advocating a 6.4:1 gear ratio? With 231? I have a hard time believing that. What size blades? 690's? 710's? I'm liking the 2000 headspeed. I'm also liking the high revving motor because that will be good for the clutch.

I'm really digging the hard-core 3D in "slow motion" that the helicopter is capable of. Looks pretty neat. Noisy. But neat.

How much does the 231 in the video weigh?

Avant RC
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10-18-2010 06:27 PM  8 years agoPost 27
KopterKat

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New Jersey

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You're advocating a 6.4:1 gear ratio? With 231? I have a hard time believing that.
Hey man I'm not trying to start anything, but what are you talking about? Do you have any experience with the TRM231?


FlipMode Squad

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10-18-2010 06:34 PM  8 years agoPost 28
Justin Stuart (RIP)

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Plano, Texas

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No, I do not have any experience with a 231, but I was under the impression that a 231 needed a 7.2 or higher gear ratio or else it would not be in it's power band. That is why the recommendation of a 6.4 gear ratio seemed so strange to me. Is it really possible to run such a low gear ratio with a 231? Wouldn't you be spinning the main blades at around 2100rpm then?

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10-18-2010 06:47 PM  8 years agoPost 29
KopterKat

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New Jersey

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The power band has been changed with the modification. Now I don't know how this runs yet but I will.


FlipMode Squad

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10-18-2010 07:02 PM  8 years agoPost 30
Justin Stuart (RIP)

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Plano, Texas

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This is interesting. My priorities are #1. As low a vibration as possible and then #2. As much power as possible. I would sacrifice power for low vibration. In the video, the helicopter seemed to have a lot of power, and perhaps because it was a 231 is was low vibration as well?

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10-18-2010 07:07 PM  8 years agoPost 31
James Kovach

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canton, oh - US

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You select the Gear Ratio based on your desired Head Speed. If engine operates "best" at 12,800-13,800, then your Head Speed choices will be based on the Gear Ratio you choose.

6.4:1 will give you a Head Speed range of : 2000-2156

6.9:1 will give you a Head Speed range of : 1855-2000

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

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10-18-2010 07:10 PM  8 years agoPost 32
James Kovach

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canton, oh - US

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I have a picture of my Heli hovering at 2050 rpm with the 6.4:1 gear ratio. It was taken at a very high resolution so I could zoom and an look over the air frame. The tail fin, tail control rods and any other part that will show vibration are as clear as can be. No signs of blurring at all.

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
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10-18-2010 09:47 PM  8 years agoPost 33
Dr. Fibinotchi

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Sioux Falls SD

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well.
Justin it depends on how its ported. Any motor can be ported higher or lower as well. This doesn't guarantee it any more powerful or less. You could have a 14k screamer or a 12.k. Each engine can have different torque curves and better and worse combustion. Toxic ported a little higher than some and thats why you heard 7.2 You stay in your ported parameters the engine maker gives you and you will be very happy. In any case a new engine on the market I applaud.

-C

If you want others to be happy, practice compassion. If you want to be happy, practice compassion.

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10-18-2010 10:21 PM  8 years agoPost 34
AceBird

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Utica, NY USA

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I'm not finished with the 30..Its still doing good for me
Thanks for the answer Bill.

What I heard in the video was changes in tone of the engine under load. I suspect it was a result of a drop in engine RPM which is why I asked if the engine had a governor. In the hands of a great pilot doing crack 3D the dip in RPM may be no problem. For myself and probably most beginners having the torque of the big block is an advantage. I remember how impressed you were Bill with the 30 doing extended power climbs. I didn't see any power climbs in this video.

I was thinking this screamer might be better suited for the Radikal being a smaller machine and maybe giving it the nitro feel and the big blocks being better suited for the 90 size and above, having that torque advantage. I am not sure how the new 231 compares to the 30 in weight.

Ace
What could be more fun?

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10-19-2010 11:16 PM  8 years agoPost 35
Toxic Al

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chuluota, Fl

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Just to clarify a few things. the Radikal is a 90 size bird, there was a governor but it was not working. the 2 motors are almost idenitcal weights.this was first time russ flew this bird. he flew one other gasser before this and when we filmed this it was on the second flight and we only did 4. when you here the tone of the motor load that does not mean it is bogging or straining it is in the meat of the power. If the motor was straining it would not recover so quickly. hope this clarifies a few things. Peace, Al

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10-20-2010 01:52 AM  8 years agoPost 36
kogibankole

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albuquerque/ibadan

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13800 would look good in my FBL spectra G . Im sure it would pull like MAD

Any vibes at such high rpms?

if im not blade bogging youll find me pack puffing

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10-20-2010 01:30 PM  8 years agoPost 37
AceBird

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Utica, NY USA

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the Radikal is a 90 size bird,
Well some say it is a 50. Maybe we could have a clarification on what determines the size of a heli. In my view it should be the size of the head parts and the length of the boom. So if you say it is a 90 then I would expect all the head parts to be the same as my preddy and the boom to be of equal length. Is this so?

Ace
What could be more fun?

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10-20-2010 01:53 PM  8 years agoPost 38
Zman

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Florida

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So if you say it is a 90 then I would expect all the head parts to be the same as my preddy and the boom to be of equal length. Is this so?
Yes.

The radikal30 in that video uses the all metal predator head. The boom is about 820 mm, give or take a couple mm. Don't know what the lengths of other booms are to the mm but for comparison purposes here are the overall length specs of 3 different gassers:

Radikal 30 is 55" length
Spectrag is 54.25" length
Predator is 55.5" length

Hope this helps

Mike

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10-20-2010 10:27 PM  8 years agoPost 39
James Kovach

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canton, oh - US

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Well some say it is a 50. Maybe we could have a clarification on what determines the size of a heli. In my view it should be the size of the head parts and the length of the boom. So if you say it is a 90 then I would expect all the head parts to be the same as my preddy and the boom to be of equal length. Is this so?
Nitro heli sizes are based on the engine size that goes into the heli. Least that is how it has been. But with the new crop of bigger engines, I think it is easier to think in terms of the length of the blades.

30 size : 500-550mm
50 size : 600-640mm
90 size : 690-720mm

Using tail booms is not going to work all that well as even two helis of the same size can have a pretty sizable difference in the length of their booms.

*disclaimer: These are my opinions. Agree or disagree, Your Call :)
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10-21-2010 10:19 PM  8 years agoPost 40
Dr. Fibinotchi

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Sioux Falls SD

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hmm
Toxic,

Could you post another video when you get a chance with a gov. I know you where just getting what you could, but honestly there is a lot of head speed being blown and with the gov you can see real performance. I am looking at the speed of the bird as well.

-Cody

If you want others to be happy, practice compassion. If you want to be happy, practice compassion.

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HomeVendor Promoted Content › TRM VX231RS , Radikal 30
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