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Author Topic: Roger's Electric Strega  (Read 1338 times)

Offline Gary Anderson

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Roger's Electric Strega
« on: August 31, 2010, 04:30:04 PM »
Hi guys,
I finally finished Roger's Strega, he was at the field today to watch its first flight. The plane flew very well, when the strega was a CI set up the wing was level. With the electric set up the outer wing tip is up, I guess??? caused bye the rotation of the prop???? If ya look at the picture you'll see I placed the battery under the wing and made a little cover to hide it. The plane is heavy but you wouldn't know it was heavy bye line tension. (Plane had same line tension level or overhead). It just doesn't seem right seeing that big baby attacking the air and doesn't hardly make a sound. I made the same motor mount that I made for my Strega, mainly the only different is the location of the battery. I was afraid of C/G but the maneuvers where great and she made a very nice landing. The only change I can see at the moment is that Roger has to much rudder offset, I would set it at zero or just a tad. When he gets well enough to fly it, will be the best time to finish trim to suit him. You'll have to ask Roger about all the components???? I just put them in, Gary
Gary Anderson

Offline Roger Anderson

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Re: Roger's Electric Strega
« Reply #1 on: August 31, 2010, 08:41:44 PM »
Don't let Gary's modesty fool ya.  He did a great job converting my strega from K&B 61 nitro power to Turnigy 42-50, 650kv motor, Hubin F-9 timer, Castle-ICE75 ESC and 4000mah, 20C, 5S battery electric power.  The airplane flies great at 8600 rpm = 4.7 sec laps on 60 plus feet .021 flying lines.  It only has one minor trim issue that will be easy to correct by adding a trim tab on the outer wing to move the tip down slightly.  Great Job GARY!!!  Thanks for your efforts.  Now only if I could get my hands on the flying handle, but I'm afraid that is a few weeks away just yet.

Best wishes and good safe flying.

Roger Anderson

Offline Dean Pappas

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Re: Roger's Electric Strega
« Reply #2 on: August 31, 2010, 08:57:40 PM »
Glad to hear of the progress guys, but you do not want to put a trim tab on this ship yet!!!!!!!!!!

Hang the plane by the leadouts and check the vertical CG.
Now that you have mounted the battery to the bottom of the plane. No trim tab will fix a vertical CG problem, and 3 new problems will surface if you try. You may have to move the leadouts down in the wingtip.

hope I saved you some grief,
Dean
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Online Howard Rush

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Re: Roger's Electric Strega
« Reply #3 on: August 31, 2010, 11:19:10 PM »
Listen to Dean.  The change in prop rotation would roll the airplane the other way.  Looks like the CG change overwhelmed the prop torque. 
The Jive Combat Team
Making combat and stunt great again

Offline Gary Anderson

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Re: Roger's Electric Strega
« Reply #4 on: September 01, 2010, 11:37:18 PM »
Hi Dean,

Thank you for your input. I held the plane bye the leadouts and the fuselage is level???? I tried the balance the plane on its wing tip and she didn't seem to be heavy one way or the other????? Please let me know what I'm missing????? I would rather do it right the first time. In level up right flight the outer wing tip is up, inverted flight the outer wing tip is down. When the engine quit the plane went into a really nice glide, almost landed bye its self. I know you're trying to be help but I don't what else to look for bye hang bye the leadouts???? Please let me know what I need to be looking for, I appreciate your help.

Thank You
Gary Anderson
Gary Anderson

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Re: Roger's Electric Strega
« Reply #5 on: September 01, 2010, 11:56:11 PM »
When you look at the airplane from the front, the wing should hang straight down.  If you are next to a vertical wall with the fuselage parallel to the wall, both wingtips should be the same distance from the wall.  Al Rabe posted some pictures of this awhile back on SSW.  If the wing doesn't hang straight down, you should either move the leadouts down or the battery up.  If the wing does hang straight down, the vertical CG is OK.  Then if it still flies banked, you can take out the warp and all will be well.
The Jive Combat Team
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Offline Gary Anderson

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Re: Roger's Electric Strega
« Reply #6 on: September 08, 2010, 12:55:52 AM »
Hi Howard,

Thanks for your input, I hung the plane and used a lazer level and she's straight with the battery and without the battery. Sorry it took so long to get back to ya, I was trying to figure out different way to test her and the lazer level seemed to be the best. God gave us great eyes but when ya have a problem ya just have to go the extra mile. I sure its a warp issue, don't want to play with the flaps cause there isn't much holding them in place. Already had to work on one with the same issue, worked on the flaps and after a few flight the control horn didn't want to hold anymore. So don't want to go there again, I guess Roger is going to try a tab on her. Guys thanks for all your help. The plane looks great in the air, just need to bring that outer tip down in up right flight.

Gary Anderson
Gary Anderson

Offline Roger Anderson

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Re: Roger's Electric Strega
« Reply #7 on: September 27, 2010, 09:15:26 PM »
I finally got a chance to fly the Straga that my brother Gary converted for me yesterday.  That beast is quite heavy and did not fly near as well as my T-Rex.  I am using the same setups in both airplanes but the power usage is quite large just as is the weight differance.  The T-Rex used 2350mah for a 5:35 flight and the Strega used 3300mah for a 5:35 flight.  I really appreciate Gary's hard work to get this bird converted but it seems we will have to make some adjustments to improve its flight charactoristics.

Best wishes and good safe flying.

Roger Anderson

PS  It sure feels good to fly again after my accident but I get tired fast and poop out after just a couple of flights.


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