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Old 07-04-2006 | 03:26 PM
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Default FourStar ARF build question

Newbie here [] !

I have a few questions.

1. The ailerons are tapered on this plane. That is, they're wider (but not thicker) at one end than the other. Does the wide end go towards the fuselage or towards the edge of the wing ? They came seperated from the wing in the box and it appears they'll fit either way. I installed one already (with the wide end towards the fuselage) and it occurred to me I may have done it backwards and wanted to post here before I do the other wing.

2. Assuming it's backwards, how do I remove the improperly installed CA hinge and re-sinstall. I realize I'll have to purhcase new CA hinges. Do I just cut down the middle of the existing hinge and cut a new slot into the wing "through" the existing CA hinge and not worry about removing the improperly installed CA hinge ?

3. Regarding the CA hinges. Which way to they go in ? With the narrow part stuck into the wing or with the wide end stuck into the wing ? There's a slit that is partially cut into the hinge parallel with the "wide" side. The slit is down the middle of the hinge to aid glue absorption I gather. Should that slit be parallel to the wing or doesn't it matter ?

4. Lastly, the wing seems to be symetrical. It looks the same from the top or the bottom. There's an identical "place" on both sides of the wing to install the aileron servo. Does it matter which side ? I know the servo get's mounted on the bottom of the wing. The manual says nothing about how to differentiate the right wing from the left one. I understand "if" the wing had a flat side, that side would be facing down, but this one appears to be identical no matter which way you hold it.

Thanks much for your help.
Old 07-04-2006 | 03:31 PM
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Default RE: FourStar ARF build question

it depend on the aircraft design which way the ailerons go. 99% of the time the wider end goes toward the fuse so your right.

the CA hinges goes in with the skinny side poking into the fuse and aileron. If you have to redo them cut the old hinge and make a new slot next to the old one.
Old 07-04-2006 | 03:34 PM
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Default RE: FourStar ARF build question

The wider portion of the aileron goes closer to the fuselage, so you are OK. If you ever need to re-hinge, cut the old hinges through and leave the pieces in the wood. Cut new slots for the new hinges away from the old ones. it is too hard to re-slot on top of the old hinges.

Put the slits in the hinges perpendiculer to the span of the wing. So it is like you are using two narrow hinges side by side. I'm not totally sure about right and left. There is some dihedral in the plane, so it would seem that the root rib of the wings (that end up joined together) would be angled such that one wing is clearly left and one is clearly right. I guess they are covered the same top and bottom also?
Old 07-04-2006 | 03:40 PM
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Default RE: FourStar ARF build question

I've built three of the Four Star 60's, and can tell you they're great planes. I"ll try and address your questions individually.

1. The wide end of the aileron goes next to the fuselage, so you've got it right.

2. doenst really apply now since you did it right.

3. The CA hinge can be used either way, but I usually put the narrow end into the wing and control surface so it goes in further and gets a bit better bite.

4. Actually, the Four Star wing is semi-symetrical, so it's a little bit (not much) flatter on the bottom. With the ARF version, there's only one correct way to join the wing, since the dihedral is already built in to the root rib and the joiner. Test fit the wing panels together, and if the wings droop down (anhedral) they are wrong. The wings should be slightly higher at the tips than the middle when they are joined (dihedral). You probably already know that, but thought I'd throw it in there, just in case.
Old 07-04-2006 | 03:55 PM
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Default RE: FourStar ARF build question

I'm relieved I did everything right so far. I understand how to establish which is the top of the wing by joining the wing halves and observing the dihedral.

Thanks to all.
Old 07-04-2006 | 04:05 PM
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Default RE: FourStar ARF build question


ORIGINAL: Joe14580

4. Lastly, the wing seems to be symetrical. It looks the same from the top or the bottom. There's an identical "place" on both sides of the wing to install the aileron servo. Does it matter which side ? I know the servo get's mounted on the bottom of the wing. The manual says nothing about how to differentiate the right wing from the left one. I understand "if" the wing had a flat side, that side would be facing down, but this one appears to be identical no matter which way you hold it.
To answer #4, assuming the plane is a Four Star 60
The top of the wing has a hole for the aileron servo wire about 1 inch from the root rib and 8 inches from the trailing edge. The instructions mention this, with a photo, on page step 3.

My plane is the yellow version so the openings are fairly easy to see through the covering. Thered is much more opaque so you'll probably have to measure and then find them by feel.
Old 07-04-2006 | 04:17 PM
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Default RE: FourStar ARF build question

ORIGINAL: Joe14580

3. Regarding the CA hinges. Which way to they go in ? With the narrow part stuck into the wing or with the wide end stuck into the wing ? There's a slit that is partially cut into the hinge parallel with the "wide" side. The slit is down the middle of the hinge to aid glue absorption I gather. Should that slit be parallel to the wing or doesn't it matter ?
#3 - see this drawing
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Old 07-04-2006 | 09:52 PM
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Default RE: FourStar ARF build question

Carrell,

Thanks for the drawing, that's exactly how I installed the hinges [8D].

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