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Old Jan 06, 2011, 11:20 PM
Ugly planes do not fly
_Sergey_'s Avatar
USA, GA, Alpharetta
Joined Mar 2007
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Quote:
Originally Posted by erh7771 View Post
I plan on using the Sickle rotors also, IMHO they sound the best at low RPMs for the money which helps get that turbine sound when taxing. I got 4pds out of one using 3700 kv motor on 5s but that is MAX for these things are week plastic. If there were some kind of fiber reinforced faster RPM would be a go but they're not.

The turbine sound also depends on the motor, IME the higher the cog the more you'll get that turbine whistle. There's a youtube vid of an A10 using haoye rotors and scorpion motor and you'd swear it was a turbine or he was creating that sound some how with a speaker. But it wasn't, it's the Scorpion motors at low RPM creating that turbine whistle.
You are right about the sound. There is one more thing that contribute huge amount to how fan sounds - dynamic balance of the EDF unit. You can actually choose the sound to some extent by strategically dis-balancing the unit. That is something I am going to experiment with when I get my motors and fans. I am more leaning toward cheap sickle fans from BP Hobbies vs. 2x expensive Skyworld's.
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Old Jan 06, 2011, 11:33 PM
Ugly planes do not fly
_Sergey_'s Avatar
USA, GA, Alpharetta
Joined Mar 2007
1,689 Posts
Servos

Any recommendation on servos? Most of my planes have HXT900. They are reliable but noisy. Would be nice to have similar reliability with better sound and precision

What servos will you use?
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Old Jan 07, 2011, 02:03 AM
*** gravity sucks ***
Fotor's Avatar
Netherlands
Joined Mar 2007
400 Posts
I ordered 6 HXT900 for this plane. I have only good experience with these servo's. Some may think they are not strong enough for this moderately fast model, but I think the control surface deflections do not need to be big, so I have trust these servo's will do fine.
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Old Jan 07, 2011, 07:33 AM
Gilbert, AZ
chalmrast's Avatar
Gilbert, AZ
Joined May 2007
3,564 Posts
Quote:
Originally Posted by _Sergey_ View Post
Any recommendation on servos? Most of my planes have HXT900. They are reliable but noisy. Would be nice to have similar reliability with better sound and precision

What servos will you use?
My last two 90mm EDF's have these:

http://www.bmkdesigns.net/emax-es08ma-servo.html

25 oz-in of torque @6V.... plenty of power.
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Old Jan 07, 2011, 08:38 AM
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Rookie2008's Avatar
Southern California
Joined Mar 2010
912 Posts
I used Hitec tech servos in my 90mm EDF's but there too big for this aircraft. How fast are they on shipping Chalmrast? Thanks for the info I will order them!
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Last edited by Rookie2008; Jan 07, 2011 at 08:54 AM.
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Old Jan 07, 2011, 09:51 AM
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North Carolina
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....
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Old Jan 07, 2011, 10:48 AM
Ugly planes do not fly
_Sergey_'s Avatar
USA, GA, Alpharetta
Joined Mar 2007
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Quote:
Originally Posted by chalmrast View Post
My last two 90mm EDF's have these:

http://www.bmkdesigns.net/emax-es08ma-servo.html

25 oz-in of torque @6V.... plenty of power.
Those servos have great reviews! Are they noisy? HXT900 make that teeth grinding sound hrrr-hrrr. The other servos I have - DS285 make vzzz-vzzz precision sound and much quieter. I know it's ridiculous to judge servo by sound, but giving all other parameters equal I'd rather stick with something I enjoy

So how they sound compare to HXT900?
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Old Jan 07, 2011, 10:53 AM
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Southern California
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sergey where do you buy your servos?
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Old Jan 07, 2011, 11:31 AM
Ugly planes do not fly
_Sergey_'s Avatar
USA, GA, Alpharetta
Joined Mar 2007
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Quote:
Originally Posted by Rookie2008 View Post
sergey where do you buy your servos?
Hobbyking.com mostly. DS285 came with DX7 transmitter. 285s are very expensive though...
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Old Jan 07, 2011, 12:13 PM
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Southern California
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OK thanks as long as I am not paying $30.00 a servo again. I have 7 airliners its getting expensive lol.
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Old Jan 07, 2011, 01:26 PM
Gilbert, AZ
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Gilbert, AZ
Joined May 2007
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Quote:
Originally Posted by Rookie2008 View Post
I used Hitec tech servos in my 90mm EDF's but there too big for this aircraft. How fast are they on shipping Chalmrast? Thanks for the info I will order them!
You can also get them at Value Hobby, which I think is closer to you. BMK is here in AZ so I would imagine 3-5 days to get them.

http://www.valuehobby.com/product_de...20&item_id=104
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Old Jan 07, 2011, 01:57 PM
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Ok Thanks Chalmrast.
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Old Jan 07, 2011, 03:37 PM
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Mesa Falcon Fld, Arizona, United States
Joined May 2004
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Quote:
Originally Posted by _Sergey_ View Post
Those servos have great reviews! Are they noisy? HXT900 make that teeth grinding sound hrrr-hrrr. The other servos I have - DS285 make vzzz-vzzz precision sound and much quieter. I know it's ridiculous to judge servo by sound, but giving all other parameters equal I'd rather stick with something I enjoy

So how they sound compare to HXT900?
I have not used the HXT900 but the Emax to me is not that noisy. I have used MUCH louder servos in the past and I hate really noisy ones personally.

Rookie2008, It takes 2 to 3 days to get to you from AZ using Priority Mail. Depending on when I receive an order they either go out the same day or the next day. I use carrier pick from USPS so generally order received before the pick-up go out the same day.

Mike
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Old Jan 07, 2011, 03:48 PM
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Thanks
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Old Jan 07, 2011, 04:51 PM
Ugly planes do not fly
_Sergey_'s Avatar
USA, GA, Alpharetta
Joined Mar 2007
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Livery

This is the painting schema I like. But if I paint plane this way it is most likely be in colors, not B&W.

http://www.airliners.net/photo/Boein...12342173bbc505

This one is also cool, but a bit girlish:

http://www.airliners.net/photo/Untit...f62777fd45e81a
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