RR Rated M For Mature
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 819 ONLINE 18 EVENTS SEARCH REGISTER  START HERE
 
8 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ]5528 viewsPOST REPLY
Advantage Hobby . Revolution Models . CarbonXtreme

.
.
Gasser Model RC Helicopters > Radikal G20
 
 
Papa Sal
Senior Heliman
Location: Reno, Nevada- USA

My Posts This: Topic  Forum

Question: What about using "old school" Moto-X racing fuel: Gas/ Alcohol? Klotz syn oil. And an expansion chamber?

"AAAHHHOOOOHHH"!!!
10-12-2009 09:20 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
SeismicCWave
Veteran
Location: Hilo, Hawaii

My Posts This: Topic  Forum		>>What about using "old school" Moto-X racing fuel: Gas/ Alcohol? Klotz syn oil. And an expansion chamber?<<

Then you get a helicopter that will only run well at one specific RPM - wide open.
10-12-2009 09:50 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
the Wasp
rrProfessor
Location: Vt

My Posts This: Topic  Forum		""And an expansion chamber?""

well if you mean an all out racing Cone to Cone Tuned Pipe then your heli really wouldn't be that good for 3Ding, because a Pipe like that gives a very short Power Band at Peak RPM, so if you ever lost Head Speed it would take to long to recover your Head Speed,,, Pow~SPLAT,,

so, we heli guys need a wider Power Band, we need more pulling power with a lower Carb Barrel opening, the Pipe in the photos is the Pipe you need for a heli, yes it is an Expansion Pipe but produces a Wide Power Band and also Muffles,,



Jim
Buzz Buzz Buzz
10-12-2009 10:33 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Papa Sal
Senior Heliman
Location: Reno, Nevada- USA

My Posts This: Topic  Forum		Thanks GuyZZZZ! What about the race fuel mix?

"AAAHHHOOOOHHH"!!!
10-13-2009 12:22 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Carey Shurley
Veteran
Location: Orlando, FL

My Posts This: Topic  Forum		I think I read that this is molded canopy. Unless that muffler doesn't get as hot as the larger ones do, or the canopy has a bigger gap between it and the muffler than it appears, or the canopy if made of some hi-temp plastic I gotta think its not gonna like being that close to the muffler
10-13-2009 12:37 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
the Wasp
rrProfessor
Location: Vt

My Posts This: Topic  Forum		""What about using "old school" Moto-X racing fuel: Gas/ Alcohol?""



I don't realy get the question,,

A) do you mean buying Moto-X Racing Fuel with Alcohol in it ??

B) or do you mean mixing Moto-X Racing Fuel with Alcohol ??

Jim
Buzz Buzz Buzz
10-13-2009 12:38 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Papa Sal
Senior Heliman
Location: Reno, Nevada- USA

My Posts This: Topic  Forum		"A" using racing fuel w/alcohol without mixing in nitro pre-mix.

"AAAHHHOOOOHHH"!!!
10-13-2009 03:27 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
oldfart
Elite Veteran
Location: Vancouver, Canada

My Posts This: Topic  Forum
Quote 
I think I read that this is molded canopy. Unless that muffler doesn't get as hot as the larger ones do, or the canopy has a bigger gap between it and the muffler than it appears, or the canopy if made of some hi-temp plastic I gotta think its not gonna like being that close to the muffler

A photo like that (almost full side on) cannot show how far the nuffler sits from the canopy or side frames, so there may well be adequate clearance.
10-13-2009 05:11 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

My Posts This: Topic  Forum		huh

Here is a thought. My EI on my engine flywheel is 4.5oz to the 7oz I think is factory. Why not put all of the flywheel weight built into the fan and go without a flywheel on the bottom. This raises the 4-7oz of dead weight and puts it several inches higher above the engine more in line with CG instead of hanging this weight at the very bottom of the heli. I flew my Roxxster with rolls after flying my min air and the pendalum effect is soo strong in comparison on the gasser.

The power the only way I could see is stuff a 27 wally in her and vbar it. Dont mess with a tuned pipe unless you want to chase a almost fictional animal. The wasp is right on the tuned pipe. ITs a pain.

The vbar will help the 600 class. I remember Eury had mad a statement from his experiance that the 700 vbar gasser didnt help much compared to a 600 going to vbar...hmm any thoughts?

In the big picture unless you can run EI off the same power as the rx with some fancy filtering electrically then you will not save any weight worth mentioning doing EI.



-Cody
10-13-2009 05:59 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
CNCjunkie
Senior Heliman
Location: Kauai (The Garden Isle), Hawaii - USA

My Posts This: Topic  Forum
Quote 
The vbar will help the 600 class. I remember Eury had mad a statement from his experiance that the 700 vbar gasser didnt help much compared to a 600 going to vbar...hmm any thoughts?

I'd have to agree with that, Cody

I just removed the vbar and put the flybar mechanics back on my Predator. It looked cool, but I didn't see any real gain other than less hardware to deal with.

Just another crappy day in Paradise....Aloha!
10-13-2009 06:34 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

My Posts This: Topic  Forum		Interesting

Quote 
Dont mess with a tuned pipe unless you want to chase a almost fictional animal. The wasp is right on the tuned pipe. ITs a pain.

Interesting to see Cody that you've gone full circle around with the tuned pipe and eventually came to the same conclusion that I did:

Although its alot more power than a muffler and you can beat nitro helis in vertical climbouts and most likely the autorotation contest at IRCHA , for everyday flying its not ideal and being stuck on the pipe at 1 rpm all the time is a pain, not to mention the long pipe running down the boom and it causing the heli to catch the wind in high speed FFF and pitch the nose.

I'm much happier with a quieter muffler, give up some power for better flight performance in my opinion and more rpm choices.

-=>Raja.

1005 Gasser, G26 3DMax++, 2205+ flights
Spectra-g, G26 3DMax, 870+ flights
10-13-2009 06:54 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

My Posts This: Topic  Forum		YEA

yea Raja I know. We all chase an animal. But the reality is that although some flights I got the tuned pipe to run its not a animal the will work. The hanson tuned pipe is not an effective pipe for helis. Sure you get power, but the vibrations of when I did get power at 13.2k almost made me go in the dirt. Several leads coming loose on the gryo, screws bolts you name it. The reasonance its a reall issue and so it the power.

Some have wanted to do a tuned pipe and broden the power band a little, but it has not happened. I hope someone in the future does this right. The hanson's power band is so narrow its not even usable.

Raja sooner or latter we get to the keep it simple mentality.. I agree on the piching up too. You just want the model to stay where its at.

-C
10-13-2009 10:25 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
t2o
Heliman
Location: Pleasureville Ky

My Posts This: Topic  Forum		http://en.wikipedia.org/wiki/2-stro...er_valve_system


Motocrosser's have had these since the 1980's and they make a huge diff, allowing that tuned pipe power, from the crack of the throttle all the way to the sign-off.

I can see no good reason, other than money?
10-16-2009 09:01 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE  
 
 
jrockstuart
Elite Veteran
Location: Allen, Texas

My Posts This: Topic  Forum
Quote 
The power the only way I could see is stuff a 27 wally in her and vbar it.

I'll have a Wally 27 and a V-bar on my Spectra soon, and I'll let you know how it goes. The V-bar can mask a lot of bad aerodynamics.

I think ditching the flywheel on the bottom and replacing it on the top makes sense from a weight balance perspective, but not much sense from a magneto perspective. The flywheel on the bottom of the engine does more than just balance the engine--it also makes the spark.

I think the real problem with the pendulum effect on the gasser is not the little flywheel but the big engine it is attached to.

I like the idea of using a "de-tuned" tuned pipe which would really quite the engine down such that you could fly a gasser helicopter at a noise sensitive field. A tuned pipe which is too short just works like a big muffler.

MinAir Spectra-G
Trex 450Pro V-bar /Scorpion /JR
Wally Motors/New England Heli/DL Canopies
10-16-2009 09:06 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

My Posts This: Topic  Forum		yea

The EI would be the only way the engine could run by putting the weight in the fan. I should have added that.

The motor is the most weight very true.


-C
10-17-2009 12:52 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Fixit
Elite Veteran
Location: UK

My Posts This: Topic  Forum		I just seen head speeds quoted for a 231 in this Heli on another Radikal thread, am I missing something or is the Radikal designed around the G20?

I only like to fly gassed up
10-18-2009 01:29 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
the Wasp
rrProfessor
Location: Vt

My Posts This: Topic  Forum		""am I missing something or is the Radikal designed around the G20""

yes, the Radikal is made for the G20, 20cc..

Jim
Buzz Buzz Buzz
10-18-2009 01:43 AM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   GALLERY
 
 
Dood
Elite Veteran
Location: WI

My Posts This: Topic  Forum
Quote 
Century says the tuned muffler bumps the HP to 2.4 ,
with a modified engine we might see close to 3HP???

Can you post a link to a page where Century says 2.4HP?

Im assuming the muffler you're talking about is the Century Torpedo Slim they sell at HeliWorld?

3 years is enough time wasted. Taking a break for a while.
10-18-2009 05:33 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
darksidedave
Senior Heliman
Location: niles,MI

My Posts This: Topic  Forum		OK , I dont see it on official Century site anymore , but here is where someone else copy/pasted it...
I will change it to "might be good for up to 2.4HP???"
Quote 
Century Radikal G20
Main rotor blades: 620mm-660mm
Tail rotor blades: 90mm
Flight time: ~20 Minutes with a consumption of 300 ml.
Empty weight with ZG20 Engine: 3659g
Weight complete with electronics ca.4431g without fuel

Specifications ZG20 Petrol Engine:
Displacement: 20.1 cc
Power: 1.73 hp with our 3D tuning silencer:> 2.4 hp

http://www.runryder.com/helicopter/...?top=1255889450
10-18-2009 07:22 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
Dood
Elite Veteran
Location: WI

My Posts This: Topic  Forum		Thanks for checking on that.
I searched Century's site and Heli World for a good hour last night and I couldnt find where they claimed 2.4 HP.

3 years is enough time wasted. Taking a break for a while.
10-18-2009 07:46 PM
PROFILE   PM   EMAIL   POSTS   BUDDY   IGNORE   HOMEPAGE   GALLERY
 
 
8 pages [ <<    <     1      2     ( 3 )     4      5     NEXT    >> ]5528 viewsPOST REPLY
Midland Helicopters . HeliProz . Ron’s HeliProz South

.
.
Gasser Model RC Helicopters > Radikal G20
 Print TOPIC Advertisers 

Subscribe to This Topic

Monday, November 23 - 3:37 pm - Copyright © 2000 - 2009 runryder.com | email | link to rr | START HERE | NF