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Old Apr 22, 2011, 11:56 AM
Watts Up?
jet-ster's Avatar
USA, TX, Arlington
Joined Jun 2006
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Thanks! This is my first real gear door try. One day I'll get brave and do the mains LOL.
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Old Apr 25, 2011, 02:31 PM
Watts Up?
jet-ster's Avatar
USA, TX, Arlington
Joined Jun 2006
1,635 Posts
Just wondering what is a good CG for this bird? Is CG on manual good? My 2 x 4s 4000mah seem very nose heavy. I might have to cut that former. I hate to do that!
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Old Apr 25, 2011, 08:36 PM
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United States, CA, San Jose
Joined Jan 2007
346 Posts
Hi Jet-ster
How much is your total weight with the 2X4S 4000mh batt? I'm trying to decide either go with 6S 4000, or 8S 4000 batt. The 8S seems to be 8oz heavier than the 6S...
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Old Apr 25, 2011, 08:46 PM
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United States, CA, Palm Desert
Joined Jan 2009
137 Posts
battery paks

I'm using 9s 3850 and my cg is right at 95mm when the pak is against the nose gear former. It's quite good. however the rclander 9&10s fan is a bit heavier than most (all metal with big motor) and that's why the batteries worked out well. When I go to 10s I'll just slide them back a bit. Jet weighs right at 8-3/4 lbs. stm
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Old Apr 25, 2011, 11:25 PM
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gilbert,az
Joined Dec 2005
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I started flying mine at 95mm but have since moved it up to 90mm with the weight of the scale cockpit and it still flies great at that point.
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Old Apr 26, 2011, 10:01 AM
Watts Up?
jet-ster's Avatar
USA, TX, Arlington
Joined Jun 2006
1,635 Posts
Thats amazing that manual CG is so way off! Thanks now it balances perfectly without cutting up the formers!!!

My AUW is looking to be about 8lbs and 5-6ozs with 2 x4s 4000mah

It's mad windy here in Dallas Texas with wild fires burning all around us. Once I get a chance I'll maiden her. Now it's time to move on to the Habu and a wind rider 737. Tough choices for me I love them both! Which to build first?? LOL I know everyone of us have this problem here in this hobby!
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Old Apr 26, 2011, 05:08 PM
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United States, CA, San Jose
Joined Jan 2007
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Good luck with your maiden jet-ster! Wemo+ARC75+8s = 8lb of trust according to Carl's data, so you should be good to go.
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Old Apr 28, 2011, 12:31 AM
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Pasadena, CA
Joined Mar 2007
438 Posts
Quote:
Originally Posted by jet-ster View Post
Thx for posting about the flaps Mike!

Here is my pretty much done gears. Pretty drop in my RX and adjust throws is left.

http://youtu.be/s3-yefe_btE
what electric retracts are you using?
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Old Apr 28, 2011, 12:39 AM
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Pasadena, CA
Joined Mar 2007
438 Posts
nevermind, found your post about the Freewing Retracts with CMP Struts.
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Old Apr 28, 2011, 04:43 PM
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Mannyman535's Avatar
United States, CA, Marina
Joined Feb 2009
1,197 Posts
more testing

I just did another watt test on medium timing,
watts were 1789, amps 79, volts 23 looks good to me on the changesun 1900kv
motor combo.
it came in at 6lbs on the nose. auw
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Old Apr 28, 2011, 05:14 PM
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mpope1's Avatar
gilbert,az
Joined Dec 2005
3,950 Posts
Just got 2 flights with the ice100, I had the ice100 lite but it ran real hot. Ice 100 got up to 150 degrees, much better then 200 with the ice lite. I have the Changesun also, downloaded my data. 1860 watts/82 Amps. I am gonna experiment with the timing, that was at 6(custom), boosted it to 7 for the next flight. My batts. are getting old. I am sure with newer batts I would be back up to 2200 watts which was where I was at when I first started flying this set up.
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Old Apr 28, 2011, 06:05 PM
Watts Up?
jet-ster's Avatar
USA, TX, Arlington
Joined Jun 2006
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Manny that awesome with a 6lb AUW!
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Old Apr 28, 2011, 08:36 PM
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United States, CA, Marina
Joined Feb 2009
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Quote:
Originally Posted by mpope1 View Post
Just got 2 flights with the ice100, I had the ice100 lite but it ran real hot. Ice 100 got up to 150 degrees, much better then 200 with the ice lite. I have the Changesun also, downloaded my data. 1860 watts/82 Amps. I am gonna experiment with the timing, that was at 6(custom), boosted it to 7 for the next flight. My batts. are getting old. I am sure with newer batts I would be back up to 2200 watts which was where I was at when I first started flying this set up.
I did the high timing and got 2900 watts @ 139amp. that was to high
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Old Apr 28, 2011, 09:05 PM
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gilbert,az
Joined Dec 2005
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Yes that would probably be to much for the motor, when my batts were fresh, I topped out at 2200 watts/89 amps and performance was great!
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Old Apr 28, 2011, 11:46 PM
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usa
Joined Nov 2008
49 Posts
t45

Quote:
Originally Posted by mpope1 View Post
Yes that would probably be to much for the motor, when my batts were fresh, I topped out at 2200 watts/89 amps and performance was great!
What size batteries were you using?
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