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RE: Stinger Build Thread - 6/23/2009 7:41 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		I removed the masking paper and wet sanded the red.





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< Message edited by sahartman21 -- 6/23/2009 7:43 AM >

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RE: Stinger Build Thread - 6/23/2009 7:46 AM   
sahartman21


 

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Status: offline 		I got some vinyl stencils from the graphics shop.

Apply as needed and mask off the rest of the airplane.

Mask off the canopy as desired.

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RE: Stinger Build Thread - 6/23/2009 7:48 AM   
sahartman21


 

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Status: offline 		Spray with a small spray gun.

Apply a light coat first.

Wait a few minutes to dry and finish spraying.

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RE: Stinger Build Thread - 6/24/2009 4:53 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		After the stencils are removed use wet and dry sandpaper to feather in the edges.

Some high quality 1/4" inch wide black pin stripes were applied.

The Stinger will be a good looking model.

Clearcoat will be next.

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< Message edited by sahartman21 -- 6/25/2009 7:11 AM >

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RE: Stinger Build Thread - 6/24/2009 3:31 PM   
DonStegall



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Status: offline 		That's one good looking plane. Great job Scott.

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RE: Stinger Build Thread - 6/25/2009 6:57 AM   
sahartman21


 

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Status: offline 		I roughened the surface of the finish with Scotch-Brite.

This gives the Clearcoat something to stick to.

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< Message edited by sahartman21 -- 6/26/2009 5:17 AM >

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RE: Stinger Build Thread - 6/25/2009 7:04 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		The clearcoat was purchased from NAPA.

It was mixed per the directions. I mixed about 4 ounces of base to 1 ounce of hardener.

I then added a small amount of reducer to thin.

A mist was lightly sprayed on the model. It was set to dry for a few minutes.

Then the clearcoat was applied until a glossy finish was achieved.

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< Message edited by sahartman21 -- 6/25/2009 7:05 AM >

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RE: Stinger Build Thread - 6/25/2009 7:09 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		After the clearcoat is thoroughly dry you can wet sand it with 2000 grit sandpaper.

I then buffed it out with some white rubbing compound.

The model has a "5 foot finish". It looks great at 5 foot but if I had to do over I would put a little more Spackle and primer on the wing to fill any grain before applying color.

In the next couple days I plan to test fly it.

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< Message edited by sahartman21 -- 6/26/2009 5:37 AM >

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RE: Stinger Build Thread - 6/26/2009 9:23 AM   
wrstew


 

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Status: offline 		Scott- can you get an all up weight with the TT40 installed, ready for flight? Looks good to me, and at speed everyone will be impressed. Randy

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RE: Stinger Build Thread - 6/26/2009 3:05 PM   
sahartman21


 

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Status: offline 		The wing weighs in at 18.25 ounces without servo.

I will weigh the finished product when completed.

< Message edited by sahartman21 -- 6/30/2009 7:01 AM >

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RE: Stinger Build Thread - 6/28/2009 11:35 PM   
sahartman21


 

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Status: offline 		Here is the finished aileron servo installation.

Nothing fancy but works great.

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< Message edited by sahartman21 -- 6/29/2009 4:38 AM >

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RE: Stinger Build Thread - 6/28/2009 11:38 PM   
sahartman21


 

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Status: offline 		A bead of Shoe Goo keeps the throttle barrel from turning.

The music wire pinches the fuel tubing to kill the engine.

Muffler pressure is used.

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< Message edited by sahartman21 -- 6/29/2009 7:11 AM >

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RE: Stinger Build Thread - 6/30/2009 6:52 AM   
sahartman21


 

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Status: offline 		A Tettra 4 ounce bladder tank was installed in the model.

A stick was taped to the tank to keep it from moving too far forward.

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RE: Stinger Build Thread - 6/30/2009 6:53 AM   
sahartman21


 

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Status: offline 		The rudder horn was made from a 6-32 screw and aileron horn.

It is just glued into a piece of wood inside the rudder.

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RE: Stinger Build Thread - 6/30/2009 7:00 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		Here is what it looks like ready to go.

It was getting late so these are flash pictures.

7/01/2009 comment -The model weighed in at 4 lbs 2 ounces. I added about an ounce of weight to the tail to balance.

The minimum weight for 422 class is 4 pounds.







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< Message edited by sahartman21 -- 7/1/2009 9:49 PM >

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RE: Stinger Build Thread - 6/30/2009 8:04 AM   
P. Johnson


 

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Status: offline 		Looks great Scott, I can't wait to hear how the maiden flights go.

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RE: Stinger Build Thread - 6/30/2009 4:26 PM   
blindfaithnogod


 

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From: wichita, KS, USA
Status: offline 		I agree. hope to see it next race

-Paul F.

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RE: Stinger Build Thread - 6/30/2009 5:25 PM   
twitte1


 

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From: Knightdale, NC, USA
Status: offline 		Scott,

Great looking plane!! Looking forward to hearing how it flies. Newbie question...Is tha canopy held down with tape?

Trey

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RE: Stinger Build Thread - 6/30/2009 8:49 PM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		I used 3M clear tape that is purchased from Darrol Cady.


http://www.darrolcady.com/Accessories/accessories_flight.htm

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RE: Stinger Build Thread - 7/1/2009 7:40 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		The model needed some some tail weight to balance.

If I had to do it over I'd move the servos farther back in the radio compartment. Probably 2 servos in back and one in the front would work better.

Moving the servos further back should reduce any tail weight.

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RE: Stinger Build Thread - 7/1/2009 8:31 PM   
Arch Adamisin


 

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Status: offline 		Super job Scott.Just like the others you've finished and shared with us. I know the I am always eger to see the techniques other modelers use to build and finish a model. You never know when an easier way to do something will pop up. Thanks for taking to time to share your work with all of us.

Arch

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RE: Stinger Build Thread - 7/4/2009 12:06 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		Don,

You can post the pictures on your site. The model flies great.

As with all test flights it was on the windiest days of the week.

Probably 25 mph winds. The wind sock was standing straight out.

It was off the ground in a few feet. It needed some up elevator but otherwise flew great.

I had incorrectly added some down elevator to the horizontal stab. If you build it with the stock tail incidence you will be correct.

The model will track around the turns without gaining or loosing altitude. It also tracks at 45 degrees all around the course.

You've got a winner of a kit. I think your modelers will like it.

Scott

< Message edited by sahartman21 -- 7/4/2009 3:00 AM >

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RE: Stinger Build Thread - 7/4/2009 12:22 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		Here are some notes based upon flying:

I balanced the model at 2.25" back from the leading edge of the wing. It took a small amount of tail weight to get there.

For the first flight the low rates on the elevator and elevator were about 3/16" each way. The rudder should be about 3/8" each way.

On high rates use about 1/4" each way on elevator and about 5/16" each way for ailerons.

I use about 20% exponential on ailerons and elevator.

After flying the model it identified that the stock incidence on the tail was correct.

Align the horizontal stab based upon the molding and glue it on.

Many fun flights to all!

< Message edited by sahartman21 -- 7/4/2009 12:28 AM >

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RE: Stinger Build Thread - 7/4/2009 1:24 AM   
fizzwater2


 

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Status: offline 		how's it fly compared to your AJ2?

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RE: Stinger Build Thread - 7/4/2009 2:30 AM   
sahartman21


 

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From: Fritch, TX, USA
Status: offline 		Both the Stinger and AJ-2 take off great. The Stinger needs less rudder during take off. About 3/8" is needed for Stinger vs. about 1/2" for AJ-2.

In the air the AJ-2 and Stinger fly similar. The both track well and handle wind well.

Both models are easy to get into a smooth rhythm around the pylons. The Stinger seems to knife edge better.

As far as speed, they are both fast.

The Stinger has a thicker wing tip by percentage of the cord, but it also has a elliptical tip. Both seem to be a clean design.

I think that these two models will fly about the same speed, especially if the 9" x 6" APC is the propeller.

Both these models glide extremely well. There is a learning curve to landing these.

< Message edited by sahartman21 -- 7/4/2009 2:33 AM >

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