I had the HK air brakes installed in my first set of wings, very effective. Here is a link to a vid showing the landing

Fox Glider 2.32M Air brake landing (2 min 10 sec)

you can see the near 45deg. decent with no increase in speed and the short landing.
They are a bit of a pain to install but work great. You need to make sure they are closed TIGHT when down or they can be lifted by the air flow over the wing. I used an HK speed/direction gizmo http://www.hobbyking.com/hobbyking/s...Regulator.html to have them open slowly but slam closed. At the start of the vid you can see them operated on the ground before launch.

Kerry

phil alvirez,

Glad to hear you got your parts from BH without incident. Don't know what the wing tube is made of but it seems to work ok. It will flex enough to support the wings in a high G pull out from a dive. I inadvertantly pulled out of a dive low to the ground after rolling out of an Immelman too low for comfort and boy you could see those wings flex down at he bottom of the dive as I jerked up elevator. Thought for sure they'd snap off. Lucky, I guess, that it held together. If you try any fancy manuevers , make sure you have some altitude first.

Hi all. Here my first video of my Fox V2
really needed the flaps or airbrakes? thanks

Fox 25 11 2012 (6 min 3 sec)

Originally Posted by Stinkey Propwash

Don't know what the wing tube is made of but it seems to work ok.

Aluminum.

Originally Posted by asmodeo

Hi all. Here my first video of my Fox V2
really needed the flaps or airbrakes? thanks

Where do you have the CG set at ? Looks to be handling fine. Good job

Originally Posted by Stinkey Propwash

phil alvirez,
Don't know what the wing tube is made of but it seems to work ok. It will flex enough to support the wings in a high G pull out from a dive. I inadvertantly pulled out of a dive low to the ground after rolling out of an Immelman too low for comfort and boy you could see those wings flex down at he bottom of the dive as I jerked up elevator. Thought for sure they'd snap off. Lucky, I guess, that it held together. If you try any fancy manuevers , make sure you have some altitude first.

Originally Posted by xviper

Aluminum.

Mine has a fiberglass tube for the joiner. Has anyone replaced the spars with something lighter...like maybe a carbon tube?The first thing I noticed upon picking up a wing was that the spar is quite heavy.
I'm a flat-lander and will be shaving weight wherever I can.

Originally Posted by sawman

Mine has a fiberglass tube for the joiner.

I don't think he was talking about the "joiner". I think he's talking about the tube that runs almost the entire length of each wing. It's aluminum. Hold it up to a light and you'll see it. The tubes the joiner shoves into and get clamped are separate from the aluminum tubes. Don't know what those are made off.

Originally Posted by xviper

I don't think he was talking about the "joiner". I think he's talking about the tube that runs almost the entire length of each wing. It's aluminum. Hold it up to a light and you'll see it. The tubes the joiner shoves into and get clamped are separate from the aluminum tubes. Don't know what those are made off.

OK, mine is aluminum also...can see it through slots in the foam and makes a "tink" sound if tapped with a screwdriver. I'm considering surgically removing it and putting a CF tube in. Thoughts?

Originally Posted by sawman

I'm considering surgically removing it and putting a CF tube in. Thoughts?

Good luck with that. I just replaced my wings after flying my Fox into a tall lamp post. I tried to extract those Aluminum tubes to see of I could straighten them. Not a chance. It would take the complete destruction of the wings to accomplish such a task. They are glued in there so solid, the tubes will be extremely difficult (if not impossible) to separate from the foam.
Besides, you won't save any weight to speak of by replacing aluminum with CF. My car has an aluminum OEM hood. I replaced it with a CF hood. The 2 weigh virtually the same. Compared to the overall weight of a flying Fox glider, the weight of those tubes are insignificant.

Originally Posted by xviper

Good luck with that. I just replaced my wings after flying my Fox into a tall lamp post. I tried to extract those Aluminum tubes to see of I could straighten them. Not a chance. It would take the complete destruction of the wings to accomplish such a task. They are glued in there so solid, the tubes will be extremely difficult (if not impossible) to separate from the foam.
Besides, you won't save any weight to speak of by replacing aluminum with CF. My car has an aluminum OEM hood. I replaced it with a CF hood. The 2 weigh virtually the same. Compared to the overall weight of a flying Fox glider, the weight of those tubes are insignificant.

I agree. The square aluminum tubes are very light. I scavanged a piece from a broken wing to use on another project and don't think you would save any weight. Big destructive job to get them out as mentioned.

Kerry

I've tried aileron rolls with the Fox. I even dived and pulled out at full throttle, and still the Fox drops and wants to fall out of the roll. My CG is at 50mm.

Is anyone having better luck rolling their Fox?

Originally Posted by maguro

I've tried aileron rolls with the Fox. I even dived and pulled out at full throttle, and still the Fox drops and wants to fall out of the roll. My CG is at 50mm.

Is anyone having better luck rolling their Fox?

Does it pitch up at full throttle (thrust line issues)?

Originally Posted by xviper

Good luck with that. I just replaced my wings after flying my Fox into a tall lamp post. I tried to extract those Aluminum tubes to see of I could straighten them. Not a chance. It would take the complete destruction of the wings to accomplish such a task. They are glued in there so solid, the tubes will be extremely difficult (if not impossible) to separate from the foam.
Besides, you won't save any weight to speak of by replacing aluminum with CF.

The reason I asked, is the only glue I could see was at the root end. But your probably right...major operation.
I've used aluminum arrow shafts on several planes with great results. Thinner walls and very stiff.

Originally Posted by Helitime

I agree. The square aluminum tubes are very light. I scavanged a piece from a broken wing to use on another project and don't think you would save any weight. Big destructive job to get them out as mentioned.
Kerry

Yours were square ?

Originally Posted by sawman

The reason I asked, is the only glue I could see was at the root end. But your probably right...major operation.
I've used aluminum arrow shafts on several planes with great results. Thinner walls and very stiff.



Yours were square ?

Sorry, my mistake (I had to go check)
Feeling a little dumb right now. Actually, I used an old GWS Slow Stick fuse (Square alum.) to repair an EasyStar wing. I guess thats where my head was at.?

Kerry

I checked an old bashed up Fox wing (same plane this time for sure) it is either glued all the way or maybe placed in the mold before the foam, it's stuck good.

I corrected thrust line issues by mixing down elevator. I now have level flight-> a slight climb from low to full power. The down elevator should only help keep the nose up when inverted. I think the main problem is just insufficient power with the stock setup. Even full power and a zooming dive produces a very slow roll that rapidly decays when approaching inverted. I just wondered if anyone was having better luck rolling their Fox.