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Old May 01, 2011, 03:05 AM
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richard boyd's Avatar
Northern Ireland
Joined May 2006
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Mini-Review
Fly Fly 3m Fox

Hi all , last week I received my new flyfly 3m Fox glider.
Out of the box it looked all good and very well packed.
On inspection of the wings I noticed some whorp in the airlerons but I was not too worried about this.
The ailerons are very small for a 3m glider !
So I thought of making a small modification to incorperate them with the flaps.
This would give me the desired roll rate that I required.
Back to the plane, the hardware is typically chineese and not that good, but you do have to remember the cost of this glider. Yip it's a very very low cost plane.
I soon set about putting the bits together and again with flyfly planes the instructions were crap, more of a parts list than instructions.

Specification
Wingspan: 3000mm (118.11")
Length: 1520mm (59.84")
Weight: 1700 - 1900g
Servos: 5x 9g, 1x Standard
Radio System: 4 - 5 Ch. (Req.)
Wing Section: Eppler 205

More coming soon

Richard Boyd
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Old May 01, 2011, 04:50 AM
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Northern Ireland
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Here is the Flyfly 3m Fox unboxed.
I attached the rudder prior to this foto, I used the hairy hinges supplied and it took abit of twisting and manouvering to get the rudder installed.
Once minipulated into place I dabbed the hinges with thin cyano to create a firm adhesion. it moves very freely
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Old May 01, 2011, 06:11 AM
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Northern Ireland
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Next job,
I joint the aileron to the flap using 2mm carbon tube, this has given me full length ailerons and will enhance roll rate of flyfly 3m Fox.
I do this on the underside of the aileron/wing

Richard
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Old May 01, 2011, 06:18 AM
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Mike Seale's Avatar
United Kingdom, Dorset
Joined May 2002
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Wouldn't it have been a lot easier (and not too expensive) to use 4 servos in the wing and mix the flaps with aileron to give the desired roll rate. additional advantage of giving inboard flaps and outboard spoilerons for landing. Making the join permanent limits your landing options.

Mike
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Old May 01, 2011, 06:41 AM
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richard boyd's Avatar
Northern Ireland
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Then I cyano the wing tips on,then mount servo, center the servo, place servo horn to align with servo (I had to relocate servo horn as the horn was not over center hinge line)
I then trimmed servo cover and attach it using uhu por as contact adhesive.
PS, You will need a 30" servo extension lead.
I used aileron servos that I got to test for a servo company in Taiwan, they are micro servos but pull a handsome 3.4kg of torque. They are fantastic centering and holding power.
The servos are not on the market yet.
Flyfly recommend 9g servo but with the alterations I would suggest purchasing a servo with more torque.
The servo mounting area is small so maybe Hitec 125mg would be a good alternate.
Both wings complete in a very short time.
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Old May 01, 2011, 07:01 AM
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Northern Ireland
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Quote:
Originally Posted by Mike Seale View Post
Wouldn't it have been a lot easier (and not too expensive) to use 4 servos in the wing and mix the flaps with aileron to give the desired roll rate. additional advantage of giving inboard flaps and outboard spoilerons for landing. Making the join permanent limits your landing options.

Mike
Hi Mike, yes I have done this mix with my VectorIII as this plane also has a slow roll rate.
.
For more precision rolls etc I think the full aileron is a better option.

Richard
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Old May 01, 2011, 07:12 AM
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Northern Ireland
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Next up I installed elevator servo.
I used EMAX ES08MA METAL GEARED SERVO !
from http://www.expressfly.org.uk/shop/pr...roducts_id=281
I know this is a small servo but it holds very well and I use these on alot of my planes and never had a problem.
Time will tell
I mounted the servo in the usual manor and aligned it up and attached the servo horn etc. etc.
Again attached the servo cover with uhu por contact.
It is good idea to dull the servo cover with scrim cloth before applying the uhu por, this will give you a better bond.
I then attached the elevator using the 2 screws provided.
On hind site, I should have used a better quality screw as these screws are soft ! so take care !!!!!!!!

Richard
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Old May 01, 2011, 07:23 AM
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Northern Ireland
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For the rudder I used a standard JR 591 that was filling cupboard space in the workshop.
The servo is old but still working and centering perfect.
As you can see I am using budget gear for the budget flyfly 3m Fox.
I did use the alu rods that were provided in the kit, after testing , there was alot of slap so I went back to the closed loop system using fishing trace wire.
This worked perfectly with zero play

Richard
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Old May 01, 2011, 07:33 AM
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Northern Ireland
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The tail wheel is simple to attach with the bolt provided.You will need to drill the hole.
I will be flying the flyfly 3m fox of the slope and will never need wheels but I put them on anyway.

The main/front U/C wheel was fitted as per pre-drilled holes, I had to file alittle out of each side of the wheel arch as the wheel is sprung and the clearance was very tight.
Job done

Richard
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Old May 01, 2011, 07:43 AM
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Northern Ireland
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Next up was the canopy and the rear view windows.
I trimmed the preformed windows and used canopy glue to attach them.
The canopy was a little bit off and it is a slow job, time was running out so I taped the canopy together as I am awaiting a pilot to fill the cockpit.
Heaven help him with my flying
The locking device will follow.

Richard
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Old May 01, 2011, 08:15 AM
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Northern Ireland
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I installed the radio gear and this should need no explaination, other than keep it as far forward as possable.
I used spektrum 7 channel rx, 2600mah rx pack (6volts)
The parts list/instructions suggest the CG to be 80mm from leading edge, I have mine set at 90mm
I would urge you to maybe work on 85mm to start with.
I added 687g (24 ounces) nose weight to get this balance point.
When I do get pilots then this will have to be reduced.

These are my throw settings
Rudders, 30mm in each direction
Elevator, 15mm up and down
Ailerons, 15mm up and down

Expo settings,
Rudder 54%
Elevator 43%
Ailerons 41%

If you use JR/Spektrum expo is positive !

If you use Futaba expo is negative !

Richard
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Old May 01, 2011, 08:53 AM
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Ok , now all the boring stuff is over then time to fly !
Yesterday I went with my friend to Slieve Gallion my local slope (Northern Ireland)
Winds were blowing strong with 38mph constant and gusts to 43 !
This was early morning and the wind does pick up here after lunch
I flew my wee windrider fox first to get my fingers working and atfer thinking I was CPLR tick tacking and 4 point roles inches of the slope I finally took dumb thumbs and dumped it in the site of the slope. It soon bounced away in the strong winds, time for coffee and a few sandwiches to see if the winds would decrease.
Well the sandwiches went down well but when I checked the wind meter the winds had increased to 43mph and gusts to 48mph.
Time to think was it going to happen.
Well it was !
My good friend John convinced me it was time to go, he stuggled to pick up the Fox in the strong winds and as if that was not an strong enough indicator, it took him 5mins to walk 25 yards to the slope face. It was 2 steps forward and one step back.
Once he finally got to the slope edge he gave me the nod and released the Fox , up up up and away she flew, I had to give her quiet abit of down stick but this was to be expected in the strong winds.
I hit the down trim until the Fox evened her self out.
After a few circuits I turned her inverted , really nice
I then did a series of left and right slow rolls and it was totally amazing to fly a glider with such ease, very lttle elevator or rudder was required.
4 point rolls were effortless.
There was no twisting out of loops or bunts.
No signs at all of any tip stall in very very tight turns.
Stall turns were a real dream as the flyfly 3m fox has great rudder authority.
As you can read, I have nothing but admiration for this low cost glider.
I nursed the Fox back to terri firma with ease and had a smile on my face that lasted the rest of the day.
I hope to get some video footage done over the next week or two.
This is the best aerobatic glider I have flown todate.
It does exactly what it sayes on the box and much more.

Richard Boyd
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Old May 01, 2011, 01:49 PM
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Woodstock 1's Avatar
Ireland, County Kerry, Kerry
Joined Dec 2005
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Quote:
Originally Posted by Mike Seale View Post
Wouldn't it have been a lot easier (and not too expensive) to use 4 servos in the wing and mix the flaps with aileron to give the desired roll rate. additional advantage of giving inboard flaps and outboard spoilerons for landing. Making the join permanent limits your landing options.

Mike
Yes, I'd agree 600%. If I think of how many times I've cut up full-span ailerons to create separate flaps and ailerons .... I don't quite understand the thinking here
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Old May 01, 2011, 05:46 PM
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richard boyd's Avatar
Northern Ireland
Joined May 2006
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Hi Chris, as I said in the posts, I set up my gliders the way I like to fly. I donot read from books etc. etc. nor do I do what the boys say !
I find it better to learn by flying not what everyone else sayes.
My Fox out performs a like model with flaps ailerons.
The proof is in the pudding !
Landing is the utmost test of a glider and pilot skills.
Practise and knowledge does help.
You should try abit of this and flaps is not always required

Richard
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Old May 01, 2011, 06:45 PM
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Adelaide, Australia
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Show us your pavers!
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