RunRyder RC Helicopter Topic - The Century Radikal flys

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Gasser Model RC Helicopters > The Century Radikal flys

helicenter
Veteran
Location: Winter Haven Fl.

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The Radikal flew today and very nicly, I put regular gasoline mixed with 3 oz.Amzol 100-1 oil in the tank.

The pre settings were 30% throttle at mid stick,5 degrees pitch with neg 2 and 14 degrees full stick, carb settings 1 3/8 low 1 1/2 high side.

The engine started very quickly, ran approx 3/4 tank prior to first hover, other than a few clicks on the trim and some blade tracking it flew very nice.

I checked all fasteners etc. for security then put 3 20 min. flights on this afternoon.

I stated in another thread that this machine had a 13 tooth pinion, thats wrong it is 14 with a 84 tooth main, I was running a 1700 headspeed with the Rotortech 620 blades, if my math is correct that puts the engine at 10,200, the fuel in the tank is very quiet,I see just a bit of vibration on the tail, however once the engine gets some time on it I thik that will go away.

This helicopter weight is right at 10 pounds with fuel, so I think it will do quite well.

Doug

10-22-2009 10:18 PM

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bulldog
Heliman
Location: france

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nice !!!

!...

if you could put some video , it 'll be cool .

you have 30 % gas at 5° pitch .
and after ...

could you give us your pitch curve and gas curve please .

thank you .

bulldog37...frenchy bulldog .

10-22-2009 10:41 PM

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Dood
Elite Veteran
Location: WI

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Can you say if this heli feels underpowered or overweight?
How does it feel compared to a bigger gasser like the Predator?

3 years is enough time wasted. Taking a break for a while.

10-22-2009 10:46 PM

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sparx
Senior Heliman
Location: canton, oh - US

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Quote
The highest rpm I ran the Pre production model was 13860 on the engine...2160 on the head...We made a pinion change to get the rotor rpms down...

That is what Bill said in another thread about this heli. So with a 14T pinion and 84T main, you are looking at a 6:1 gearing ratio. That means to get 2000rpm at the head, which is the RPM I typically run on my helis, you'd be spinning the engine at 12,000RPM. Seems like this will work out just fine. If you go to the 13,860 he was running it at, then you would be 2310rpm at the head. I think that would move this heli around with authority :P.

10-22-2009 10:55 PM

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helicenter
Veteran
Location: Winter Haven Fl.

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Radikal

Bulldog

I will post the typical curves later, we plan on flying several of these at the Mulberry event in november, this one with a stock engine, Billme with a Hanson motor, and another with maybe something else, I have made arrangements for some vidio.

Doug

10-22-2009 10:58 PM

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helicenter
Veteran
Location: Winter Haven Fl.

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Radikal

Dood

I am not a 3D guy, I fly scale and sport, my daily flyer has been the Condor, 15 pounds and will go like hell, however the Radical is very nimble with lots of power, I did a couple of very conservitive climbouts this afternoon, I dont think you are going to lack for power.
I look at another aspect, if you put 660 blades on a 10 pound helicopter it should autorotate very nice and do well in a scale application.

Doug

10-22-2009 11:08 PM

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smallplanes
Key Veteran
Location: Timmonsville,S.C. ,USA

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Your good to get the heli flying so fast,i wish mine was like that. Let us know how it goes?

Thanks

Spectra G 26cc
Jewel
2 Evo 50's
3 Trex 450's
Trex 700
Raptor50
12Z

10-23-2009 01:27 AM

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helicenter
Veteran
Location: Winter Haven Fl.

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Radikal

Thanks Smallplanes---I have been doing this a long time, however the next one may be a different deal.

Doug

10-23-2009 01:37 AM

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rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

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Mulberry eh?

Quote
will post the typical curves later, we plan on flying several of these at the Mulberry event in november, this one with a stock engine, Billme with a Hanson motor, and another with maybe something else, I have made arrangements for some vidio.

Do I get invited to Mulberry to fly the 3rd one with you guys?

-=>Raja.

1005 Gasser, G26 3DMax++, 2205+ flights
Spectra-g, G26 3DMax, 865+ flights

10-23-2009 02:07 AM

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helicenter
Veteran
Location: Winter Haven Fl.

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Mulberry

Absolutly your invited, stop by your neighbor Joe Howard throw him in the car and come on down, Joe loves to drive 16 hours at a time, so you can sleep.

10-23-2009 02:13 AM

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rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

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Is Joe coming?

If so and if he doesn't mind maybe I can stop by and drop by birds off and then fly down to Florida so I'm not beat from the long drive and can fly better that way

-=>Raja.

1005 Gasser, G26 3DMax++, 2205+ flights
Spectra-g, G26 3DMax, 865+ flights

10-23-2009 02:55 AM

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HOYTAB
Heliman
Location: Kingston NH

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hi all,do they make an air cleaner for the g20?

10-23-2009 12:38 PM

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helicenter
Veteran
Location: Winter Haven Fl.

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air cleaner

I dont know, but someone should.

Doug

10-23-2009 03:13 PM

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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How do I get a Hanson G20 for this bird? Nothing on the Hanson or Century website.

10-23-2009 03:25 PM

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shawmcky
Key Veteran
Location: Isle of Wight,United Kingdom

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Air cleaner

if that motor is using a walbro carb,i expect that the aftermarket types that fit the 231 and 260 will also fit the little engine.Hanson sells them.

Team- unbiased opinion,no experts here just trying to help thats all.K.I.S.S principle upheld here

10-23-2009 03:47 PM

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bec123
Heliman
Location: regina, sask. canada

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starter

Hello Helicenter and all,,,,did you use the pull starter or the shaft start on this heli. You did state it started easy, so if shaft start will an average starter turn over the engine. Also did you get the heli with the Lt or HD head. I am going to order one and am looking for best options. I will fly more aggressive.

bec123

10-23-2009 04:29 PM

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CNCjunkie
Senior Heliman
Location: Kauai (The Garden Isle), Hawaii - USA

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Fine mesh screens are available for the velocity stack. I don't have a link, but I've seen them.

Just another crappy day in Paradise....Aloha!

10-23-2009 04:32 PM

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helicenter
Veteran
Location: Winter Haven Fl.

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Radikal

here are some answers to previous questions.

Pitch curve 14 33 52 67 76 52 percent represents 5 degrees

Throttle 0 14 30 48 70 30 percent represents 1/3 throttle

The power consumption for the e ignition system seems to be about 1/3 that of the flight system, remember these flight times were hovering casual sport flying with moderate climbouts.

Doug

10-24-2009 10:59 PM

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