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Old Feb 27, 2012, 10:42 PM
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Look out! Kin is getting his slide rule out. lol!
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Old Feb 28, 2012, 12:12 AM
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Quote:
Originally Posted by kin View Post
Can i know more about the heli information ? 500 size , but look not small ! and how it tail system , very attactive me !
A couple of NOTAR'S I've seen run an EDF from a electric jet up front of the tail boom, a few inches behind the main shaft. Running a separate battery and have a variable puffer run by a servo at the back to direct the air this is connected to a gyro.
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Old Feb 28, 2012, 07:49 AM
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ducted fan running off the tail shaft? or scroll fan around the main shaft.
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Old Feb 28, 2012, 08:12 AM
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Originally Posted by mhills51 View Post
ducted fan running off the tail shaft? or scroll fan around the main shaft.
Nice helicopter!!

But as to your answer neither! The fan blows directly down the tail boom, the fan being near the top end. With adjustable vents at the rear to control air flow and direction. Someone posted about it on one of these threads ages ago. With a flying video.
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Old Feb 28, 2012, 08:48 AM
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I know the fan blows down the shaft. Two ways I have seen are listed above. These are pic I took here in KC
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Old Feb 28, 2012, 09:47 PM
kin
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it is from Vario . not small ! but is it same model in that video ??
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Old Feb 29, 2012, 02:09 AM
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Perth, Western Australia
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Originally Posted by kin View Post
it is from Vario . not small ! but is it same model in that video ??
Kin

Zh ji zhshēngjī sh bsh VARIO

Zh ji zhshēngjī shle TREX 500

Wishme nǐ sh hnxio?
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Old Feb 29, 2012, 02:10 AM
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Kin,

Did you get my 2 emails I sent direct to your email address a few days ago?
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Old Feb 29, 2012, 02:12 AM
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Originally Posted by mhills51 View Post
I know the fan blows down the shaft. Two ways I have seen are listed above. These are pic I took here in KC
I think we were talking cross purposes! You was asking about yours maybe? and I was answering about the 500 Notar. Lol
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Old Feb 29, 2012, 06:02 AM
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Australia
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exi 450 bell 212 (1 min 52 sec)


Can anyone give me some tips on how to get a stable hover. I know its pretty low to the ground but its super windy outside at the moment. I cant seem to keep a constant altitude. it keeps "bobbing" up and down

Hk 4 blade head with plastic HK scale blades
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Old Feb 29, 2012, 07:32 AM
kin
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http://www.youtube.com/watch?v=o8u-f...ature=youtu.be

Can anyone give me some tips on how to get a stable hover. I know its pretty low to the ground but its super windy outside at the moment. I cant seem to keep a constant altitude. it keeps "bobbing" up and down

Hk 4 blade head with plastic HK scale blades
What is the pitch curve setting , have you make the pitch in hovering from 35%to 75% a little flat it mean let the pitch curve (slower). because 450 size are also high head speed . the reation is almost fast and not easy get stable if the pitch too sensitive . you must make the hovering section pitch slow !see the drawing . and if you fly in normal thottle curve , it mean the motor speed have change follow the stick , it is most diffcult . in my experience , keep the thottle in idal-up . just control the pitch . it is more stable .don't make two changing factor add together . idal-up flying have one changing factor only !. so it is more easy to fly especial in windy condition landing ! if you lower the motor and light blades , very very hard to landing your model .
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Old Mar 01, 2012, 10:22 AM
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USA, TN, Millington
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Quote:
Originally Posted by Wade1 View Post
http://www.youtube.com/watch?v=o8u-f...ature=youtu.be

Can anyone give me some tips on how to get a stable hover. I know its pretty low to the ground but its super windy outside at the moment. I cant seem to keep a constant altitude. it keeps "bobbing" up and down

Hk 4 blade head with plastic HK scale blades
Dont look to bad considering youre in a room where the air is not being dispersed as it would in a very large room or outside.
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Old Mar 01, 2012, 04:06 PM
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United States, FL, Orlando
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You might want to try weighted blades that what i got on all my heli's and they fly pretty good out doors in 5 to 8 mile per hour wind here's one of them
EC-135 450size (2 min 39 sec)
u can check my other ones to
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Old Mar 02, 2012, 10:26 PM
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New Smyrna Beach, FL
Joined Jun 2005
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Had a fortunate surprise yesterday. Bell factory 429 was out on a demo tour and stopped in to Merritt Island, Florida. I was able to grab a few pictures and talk with the pilot briefly.

Mike
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Old Mar 03, 2012, 02:08 AM
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Joined Feb 2012
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Here are some of my ones

AS 350 600 size and Hughes 500E 700 size
Jet Ranger News Chopper 700 size

Next Projects

EC-145 with torque tube 600size
SA342 Gazelle
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