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CanoMod . Futaba-RC . A Main Hobbies

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Scale Model RC Helicopters > Bell 222 for first timer.... Is it a wise choice?
 
 
jimmyackSenior Heliman - Location: Singapore -
Hi Guys,

I've been looking at all these beautiful photos and videos of Bell 222's on a Trex600 and I want to do my own. The body is gonna be a Trex600E GF or CF( which is best?) with a 12S lipo setup with 2X6S 2600 mah packs. I've never attempted a scale before and I am a bit worried that the Bell 222 might be too hard, specially with the retracts to fit.

What do you guys reckon? Would it be too much for a first timer? I will be using a Funkey fuse and I have limited access to balsa wood around here in Indonesia. How difficult is it to do a scale? Do you think it would be easier to get a Hughes?

I also wish to fit some lighting to the heli. Can you recommend a good one? But more importantly, can it be triggered remotely?

Has anyone done an A123 12-14s scale heli? Does it work out ok?

Apologies for the numerous questions.

I would really appreciate if you guys could help me out.

Thanks
07-31-2008 12:47 PM
 
 
heli boi
Heliman
Location: Dothan, Alabama

Hi, scale is scale. The 222 has its challenges just like anyother fuse. Go for it! You wont be happy unless you model what you want! Buy the fuse, ask question and learn while you build and post pics. Im sure everyone here will be more than happy to help you.
07-31-2008 01:23 PM
 
 
jimmyack
Senior Heliman
Location: Singapore

Okay, thanks for the advice.

How about power system? Would a 12s 2600 mah give me reasonable flight times, something in the range of 7 mins+ if possible. I really don't want to get into huge 5000mah packs which cost a bomb.
07-31-2008 05:46 PM
 
 
steph280
Key Veteran
Location: Irvine, California

I run 10S 3300 on my T-Rex 600 with Airwolf fuse. Even with the 15 LEDs and 7 servos, I still get 8 minutes with time to spare. The motor doesn't need to pull too much amps at 10 or 12S. But make sure your packs really can put out the stated capacity.

The only difference with Bell 222 is just the addition of retracts. You just have to make sure they don't bind. Other than that, heli boi is right, scale is scale. Build what you like and enjoy.

Lots of good scale info on thetrexforums.com.
07-31-2008 05:53 PM
 
 
Edwardp
Heliman
Location: Malaysia

Unless you found someplace that sells the 600 kit without the electronics, 12S on the stock setup is quite impossible. Even with the smallest available pinion, the stock motor (1650KV) will give you more than 4K headspeed! You could however hook up the 2 lipos in parallel instead of series for a 6S 5200mah and that would be ideal.

I am running affordable Aplus 22C lipos on 3 of my scale up Rex600. 3pcs of 6S 4500mah (US$165) and a 6S 5300mah (US$199). The oldest has more than 50 cycles on it, and still is as good as new.

One of my bird, an MD530, is th only one on stock motor, esc runs with 6S 4500mah will give me 8-10mins of fun. My latest .60 Bell 222 will run for 20mins++ or 24mins if I run till cut-off, on 2 x 6S 4500mah hooked up in parallel. It is 12S capable with Z50 780KV motor and Turnigy 100A ESC but I prefer to run them on 6S for that slow, scalish feel!

A123s should work out ok but in terms of mah/price or mah/weight, it's still lipos at least for the time being!

Another thing to concern with potentially is, resonance. Fuses tend to amplify the shakes, so make sure the blades are properly balance.

Go enjoy!!
08-01-2008 05:35 AM
 
 
jimmyack
Senior Heliman
Location: Singapore

hat's a lot of great info guys. I considered running them in parallel but I got worried that the packs would not be discharging equally. Is that a real potential issue? For sure that would be less costly to start off with.

How about blade sizes on the 600e? Saw that SAB has a 620 blade. Would that be more desiresble for scale? Else what are other good options for blades?

Thanks again
08-01-2008 05:57 AM
 
 
Edwardp
Heliman
Location: Malaysia

I don't keep them plugged in after flights and I charge them individually so it's working ok for me.

I've tried 610 Carbontechs briefly. But the stock setup ran very hot inside the fuse, so I switched back to 600s. A Z50 on the other hand with 10T normal or 11T helical pinion will swing 710s without breaking a sweat!
08-01-2008 06:56 AM
 
 
darrens
Key Veteran
Location: United Kingdom

I have this model and run 6s on the XL motor, run time is around 6-7 mins. You can extend the run time with semi-symetrical blades which will add around 1-2 mins as they are more efficient. I use 600mm blades currently.
Retracts are hard to set up but I would recommend getting a channel splitter. This allows you to use just one channel for the retracts, but set the end point movements independently for each retract servo. I also run a "servo slow" to make them look better.
You wont require balsa.....just a piece of marine ply sat on a couple of ply runners to get the mechanics to sit high enough in the fuse.
Finally, I would say to you that once built, access to the mechanics is very limited, it's slightly difficult even removing batteries. All you can do is lift and rotate the top section, but you can't remove it for the head. Having done the 222, I would choose either the Ranger or the 500 next time for that reason alone. Other negative, is that the retracts are very flexible and the heli tends to shake real bad on spool down. I have to land, then throttle chop with negative 12 degrees on the blades to make sure I stop the rotors quickly, and before people suggest something is out of balance.....everything is in balance, it's just ground resonance.

He who dies with the most toys is the winner!
08-01-2008 09:56 AM
 
 
jimmyack
Senior Heliman
Location: Singapore

Semi-symetrical sounds good but are also hard to find. Anyone knows where I could source those? As for the retracts, I've seen some people use more sturdy ones on the Airwolf. I believe that the fuse should be the same, am I right? They should be more sturdy if I am guessing right.

Since access to the fuse would be very limited, do you think it would be better to assemble the heli as a Trex 600 first, test ride it for a few days and then only mount it inside the fuse? Or do you guys mount it right away.

As for lighting, how difficult is it to put in the fuse?

Great place to seek advice as everyone is so friendly.
08-01-2008 10:31 AM
 
 
darrens
Key Veteran
Location: United Kingdom

Century sell 600 semis, but they are silver metalic in colour which is why I don't have them, but you are right, they are hard to come by.
The retracts I refer to are Century ones, they are like thick piano wire.....not the best. You can source alternatives.
I would always build and test fly first in any scale if possible, even where access is not tight. If you are going to have a failure, you want it prior to the mechanics carrying your precious fuse!!!

He who dies with the most toys is the winner!
08-01-2008 11:48 AM
 
 
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Scale Model RC Helicopters > Bell 222 for first timer.... Is it a wise choice?
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