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HelicopterCentury Radikal G20-30 N640 Hawk Predator › ((( OFFICIAL: Century Radikal G20 Gas Powered Helicopter )))
10-20-2009 04:45 PM  8 years agoPost 101
Blade_Master1

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Canada

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I am thinking that Century jump the gun on this one with the release dates

The heli is the only thing available at the moment
NO Parts so don't crash yet

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10-20-2009 05:13 PM  8 years agoPost 102
imnxtc

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BC.Canada

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I talked to them yesterday and they do have the parts. Unfortunately last week they had a catastrophic computer failure before they could get the parts into their system. So it seems they will have to operate everything manually until they get get it all back on stream.

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10-20-2009 05:27 PM  8 years agoPost 103
jackheli

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Vancouver - Canada

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Anybody knows the part number for the removable pull-start?

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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10-21-2009 01:23 PM  8 years agoPost 104
Ironside

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Baltimore, MD

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Instruction manual has been posted to their website.

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10-21-2009 05:12 PM  8 years agoPost 105
CNCjunkie

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Kauai (The Garden Isle), Hawaii - USA

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I'm not finding the manual.

Do you have a link?

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

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10-21-2009 05:22 PM  8 years agoPost 106
Ironside

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Baltimore, MD

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It's on the right hand side of the screen. Here's the link:

http://www.centuryheli.com/products...m?currentid=498

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10-21-2009 06:26 PM  8 years agoPost 107
bulldog

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france

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hello !!!

thank you for the link .

i see that the electronic ignition is not included with the kit ....
look p 39 of the manual .... .
where can we buy it ....what is the number part ??? ..

it's not cool ...

bye and have good fly .

bulldog37 ...frenchy bulldog

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10-21-2009 06:26 PM  8 years agoPost 108
CNCjunkie

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Kauai (The Garden Isle), Hawaii - USA

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Now I see it, Thanks. No caffeine yet this morning.

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

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10-21-2009 06:57 PM  8 years agoPost 109
jackheli

rrProfessor

Vancouver - Canada

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Wow. First time I see a hammer used in helicopter building...

That is brutal...

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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10-21-2009 07:11 PM  8 years agoPost 110
oldfart

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Vancouver, Canada

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Jack

Did you read that step carefully?

The hammer is used on the engine to "gently tap" the airplane hub that it comes with, to break it loose on the crankshaft, while it is all properly supported.

I have used the same method many times over the years to tap of prop hubs from airplane nitro engines that used tapered inserts.

Not everyone has a gear puller in their shop for such menial tasks. The method explained in the manual actually works very well.

Sorry if you did not find the manual worthy because of this. I guess they should have just left everyone to figure out for themselves how to remove the prop hub.

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10-21-2009 08:12 PM  8 years agoPost 111
CNCjunkie

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Kauai (The Garden Isle), Hawaii - USA

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i see that the electronic ignition is not included with the kit ....
look p 39 of the manual .... .
where can we buy it ....what is the number part ??? ..
The Electronic ignition module doesn't come with the kit, it comes with the engine.

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

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10-21-2009 11:21 PM  8 years agoPost 112
Ironside

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Baltimore, MD

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One thing I noticed from the manual is with the kit coming with a 84T main gear and a 14T pinion, the gear ratio would only be 6:1. In order to obtain maximum performance from the 20cc engine (1.7hp @ 8500rpm), the head speed would only be 1417. I wonder if there is going be an option for a higher gear ratio to get the head speed up a bit.

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10-21-2009 11:52 PM  8 years agoPost 113
Blade_Master1

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Canada

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1417 HS

I hope it does better than that. My hawk pro turned a 2000HS which is what I prefer, even my Raven turns 2100 HS,

Are you sure the main is 84T because even with a 16T pinion you will only get 1619 HS I sure hope it is a mistake

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10-22-2009 12:23 AM  8 years agoPost 114
imnxtc

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BC.Canada

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ironside,

What is the HP/RPM spec on the G231?

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10-22-2009 01:57 AM  8 years agoPost 115
Ironside

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Baltimore, MD

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According to the manual, it is an 84T main gear. I don't have a kit (yet) so I can't speak to the truth of that but if it is, it will be really interesting to see how it handles.

As far as the specs for the G230:

Type: 2-stroke
Displacement: 1.37 cu in (22.50 cc)
Bore: 1.30 in (32.00 mm)
Stroke: 1.10 in (28.00 mm)
Cylinders: Single - Chrome Plated
Engine (Only) Weight: 56 oz
Crankshaft Threads: M8 x 1.25mm
RPM Range: 3,000 - 11,000
Fuel: Gas/Oil Mix
Mounting Dimensions: 142 x 105 x 181mm
Muffler Type: Can
HP: 2.2
Cylinder Type: Ring
Carb Type: WT644/WT643
Crank Type: Ball Bearing

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10-22-2009 05:03 AM  8 years agoPost 116
oldfart

rrProfessor

Vancouver, Canada

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What is the HP/RPM spec on the G231?
It is much the same as the G20 - happens at about 8700 or so RPM.
RPM Range: 3,000 - 11,000
for the bigger G231's.

And you will find this is also similar to that of the G20.

You cannot set gas engines, with their relative lower rpm/hp ratios, the same way as you do for the nitros due to the different realtionship to torque in these HP ratings. That is why you will find their throttle curves are very different from each other.

You will also find that flying our big gassers at 1800 to 2000 head speed, for the harder 3D type of flying, even though the engines are also peak HP rated at around 8700 works our fine. That is because you can drive these gas engines at much higher rpm (11K to 12K) and the G20 at even 13K and still get good torque from them.

If you follow Bill M's posts on flying this bird, in its' R&D phases, that appear in the gas forum here on RR, you will find he even flies it with a 2100 head speed with the G20 turning at 13K and finds it all works out rather well.

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10-23-2009 12:35 AM  8 years agoPost 117
Blade_Master1

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Canada

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If you follow Bill M's posts on flying this bird, in its' R&D phases, that appear in the gas forum here on RR, you will find he even flies it with a 2100 head speed with the G20 turning at 13K and finds it all works out rather well.
How is it possible for him to run 13,000 rpm when the engine maxs out at 10,000 rpm ?
To be honest I don't see how your suppose to get a 2000HS with the current gearing

Type: Gas Electronic Ignition
Displacement: 20cc
Bore: 32mm
Stroke: 25mm
Cylinders: Single
Total Weight: 41.6 oz with muffler, ignition and mount
Engine (Only) Weight: 33 oz
Crankshaft Threads: 8x1.25mm
Benchmark Prop: APC 15 X 6 9500 rpm
Prop Range: 14 x 6 through 16 x 6
RPM Range: 1400 - 10,000
Fuel: Gas/Oil Mix 32:1
Muffler Type: Compact Welded Can (included)
HP: 1.7 hp @ 8500 rpm
Cylinder Type: Nikasil, ring

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10-23-2009 01:24 AM  8 years agoPost 118
gorn

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Western Australia

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its quite well known that the G20 motor specs are listed very conservatively.
Same with the G23 and 26.
When I had my gsser with a 26, yes it was modified, but it ran at 13k all the time.
If Billme says it can do it, trust me, it can

For the love of the hobby

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10-23-2009 01:29 AM  8 years agoPost 119
Blade_Master1

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Canada

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my car redlines @ 6500 should I drive it @ 5500 rpm and expect it to last ?

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10-23-2009 01:31 AM  8 years agoPost 120
Blade_Master1

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Canada

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There are a few things that don't add up with this model.

I'll wait till the summer and see what the others have to say.

Oh well

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HelicopterCentury Radikal G20-30 N640 Hawk Predator › ((( OFFICIAL: Century Radikal G20 Gas Powered Helicopter )))
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