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Old Nov 09, 2012, 02:51 PM
chuck
santa barbara, CA
Joined May 2009
3,940 Posts
ljh, if u can get away w/ 4's , u will be much better off due to the weight penalty w/ the wemo/ hacker over the stock set up. i have a wemo and the package makes good power but w/ the battery size it takes to support the additional watts the weight adds up .
imo , one of the airframes w/ more wing area is better suited to your setup, ie the t45, or if u like the style , the screamer. my wemo ended up in a screamer after a couple of others and it's a way better match as the wing type airframe handles the weight great. mine is a no brainer on launch, no question the easiest edf hand launch in my stable even w/ a 3cell 1600. very wide flight envelope , 20mph - 100 mph

chuck.
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Old Nov 09, 2012, 06:11 PM
Registered User
Joined Jun 2011
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F18 showed up today!
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Old Nov 09, 2012, 07:13 PM
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Joined Jun 2011
144 Posts
Couple of small issues out of the box. One servo is bad. Will not turn at all. Also, one control rod coming from the good servo is not connected. Gonna have to glue it on, and see if I have a spare servo. Otherwise, great looking little plane!!
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Old Nov 09, 2012, 08:37 PM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
9,906 Posts
Look on the bright side
Bad servo out of the box , beats bad servo half way thru maiden flight
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Old Nov 10, 2012, 04:40 AM
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Mike20's Avatar
Joined Sep 2012
544 Posts
Hey guys I was checking my cg and my t45 50mm was nose heavy. I got the ARF version from Hobbyking and I'm using all the stock electronics except my own AR6400 Rx and sky lipo 3s 800mah 40c lipo batteries. Any ideas of why or a different battery placement? I want to maiden today but I don't want to with a cg that this plane has. I'll take a photo in a minute after I get the plane set up again.
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Old Nov 10, 2012, 04:43 AM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
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Mine flys on a 1000ma 4s 40c li-po and it has 2- 1/4 oz lead weights on the top of the tail pipe
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Old Nov 10, 2012, 04:50 AM
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Old Nov 10, 2012, 04:57 AM
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I got this after moving the battery back so looks like I'm gonna have to cut out some foam.
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Old Nov 10, 2012, 05:09 AM
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The cg is 50mm from the leading edge of the wing right?
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Old Nov 10, 2012, 05:55 AM
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United States, TX, Keller
Joined Jul 2011
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From my limited experience on the T-45, F-16 and Katana a wee bit nose heavy is not a bad thing at all.
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Old Nov 10, 2012, 06:03 AM
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That's what I thought. But my first photo I think that would be too much. The canopy really brings it down(nose heavy) so I taped a nickel and penny to my vertical stabilizer and viola it's just a tiny bit nose heavy. Now thats much better looks almost like my 2nd photo but with the canopy on this time and the nose lower.
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Old Nov 10, 2012, 07:11 AM
222 km/hr Parkjet flyer
solentlife's Avatar
Latvia / UK visits
Joined Jan 2010
8,325 Posts
Quote:
Originally Posted by alpea 41 View Post
Mine flys on a 1000ma 4s 40c li-po and it has 2- 1/4 oz lead weights on the top of the tail pipe
My T45 has :

4s 1600 35C Lipo
25gr tail weight in plate either side of fin
5000kv Turnigy 2610
6 blade cheap HK rotor fittted to stock shroud
50A ESC

Thrust to weight is over 1.1 to 1

I can improve the weight issue by removing the elevator servo from front ... replace with two smaller 6.5gr servos at back end for elevator ... removing need for the metal weight at tail.

I'm a speed freak and this just about gets up in the WOW factor arena ... run-time is short at just over 2mins if WOT all time ... but the speed envelope / throttle response is incredible ... with the amount of power developed - I could fly around similar to stock speeds and have reasonable run-time ... but the adrenaline rush of those fly-bys ! The sound of that 5000kv on song !

Check out my youtube channel "solentlifeuk" for all my variations from stock up to my $30 upgrade speed machine ......

I could spend a lot and have performance - but I have limited budget as I like ALL types of model flying ... so I have played with budget gear and reached a level of performance that was a surprise ...
I reckon the T45 is about the best all-rounder but at about 150kph - it's at it's speed limit based on drag and airframe.

My Lanyu 64mm is similarly stuck at about 140kph ... the Sapac T45 I note does reach higher speeds and I am interested to see about getting the 50mm up there ...... I will make more experiments ...

Nigel
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Old Nov 10, 2012, 07:11 AM
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Would 15 mph winds be acceptable with this plane? Or should I wait for a calmer day to maiden the goshawk?
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Old Nov 10, 2012, 07:19 AM
222 km/hr Parkjet flyer
solentlife's Avatar
Latvia / UK visits
Joined Jan 2010
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Quote:
Originally Posted by Mike20 View Post
Would 15 mph winds be acceptable with this plane? Or should I wait for a calmer day to maiden the goshawk?
Maiden ? Wait particularly if you are running stock levels of battery etc.

Both my T45's I've flown in 20mph and up ... but I run power levels that are far higher than most ...

Nigel
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Old Nov 10, 2012, 07:49 AM
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United States, TX, Keller
Joined Jul 2011
2,629 Posts
I've flown the T-45 in 15+ but for maiden, I like to have everything going for me. Tough when the little voice inside keeps saying: "It's too windy !" " Don't do it !"

In Texas, we're used to 8-10+ on a regular basis so I zero that out of my mind : 10=0 LOL

I'd wait.

-Hawk
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