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Old Jul 18, 2014, 02:11 PM
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United Kingdom, Wilmslow
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Build Log
Falcon FPV - flyingwings.co.uk - Short build log

Here's the wing:



Buy it at: Flying Wings .co.uk

The reason I'm calling this a short build log is because, I won't be going into as much detail as some of the other gents do on here!

Just sharing my experience with building the wing, ideally over a few evenings.

Ordered some electronics:

NTM Prop Drive 28-36 1800KV http://www.hobbyking.com/hobbyking/s...dProduct=46574

Hobby King 30A ESC 3A UBEC http://www.hobbyking.com/hobbyking/s...dProduct=25986

Also ordered the accessory pack for the NTM and have some spare control horns knocking about.

UNBOXING

Attach are the pics from the unboxing showing all the parts laid out, a few things I noticed different from the order, had laminate supplied, but didn't request it (not complaining!) ordered Red and got the fluorescent colour, again don't mind, looks pretty cool =]
And unfortunately, the ply motor mount was missing which was quickly resolved and sent out.

Having a nosey through the well written and illustrated instructions I also noticed that the control horns, clevis and pushrods were missing. But will install my own.

More pics / info to follow
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Old Jul 21, 2014, 03:21 PM
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United Kingdom, Wilmslow
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And that's pretty much it!
Could easily be done in an evening.

Mobius cam up front balances it out alright, and can fine tune the CG with vtx/rx.ESC placement

Next the maiden and FPV flight!

Costing

So far this build has cost:

PNF (Needs Lipo + FPV) 58
RTF (Needs FPV) 65
RTF-FPV 105

These prices exclude P&P, Tx/Rx and Mobius.
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Last edited by DodgeRC; Jul 22, 2014 at 09:01 AM.
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Old Jul 26, 2014, 08:23 AM
usual old know-it-all
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Joined May 2005
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looks chunky,good size too..
I fpv'd a few ravens but a bit on the small size,this looks better
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Old Jul 27, 2014, 05:00 AM
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Maiden / review

Well didn't go too well.
I had placed the 2200mah in place of the 3000mah, this was so I could play with weight distribution after the maiden.
It balanced exactly on 190mm (as per the plan) with this setup, which is odd considering it should be for 3000mah.

The first flight showed exactly how off it was, shot straight up, back over my head and flew as bad as a tail heavy plane does.

After some messing about taping other batteries here and there got it flying.

The CG measured at 175-180mm from the leading edge of the foam, which it looks like on the plan, however 190mm as stated could be right from the front of the GoPro/Mobius box, but the instructions done really explain this...

Positive points
It was easy and fun to build, good learning curve for those who are new to building, and brill for the experts who like to tweak or do their custom build!

All the parts come with the kit, so no needing to head out and get extra bits.

Foam is tough, and easy to work with, ply pieces are great and the front mount is a piece of art.

Instructions are easy to follow

Easy to launch, handles the power and speed well, floats really well!

Skid plate is a nice feature

As shown, can be built using just hot glue!

Negative points

It feels a bit flexible to me in some places, such as the motor mount and from about 1/2 way across the wing

Ailerons are the same, quite bendy. I would recommend some long carbon flat strips on the ailerons to stiffen them up a little, and maybe using some of the spare ply around the motor mount to stiffen it up a little

The skid plate is quite thin, maybe could do with being a little thicker.

These things won't stop the plane from flying, just the things I think need some attention.

Follow up

The plan now is to set up on the new CG and ill check if the 190mm recommended is from the camera mount.

I will be installing a 200mw vtx into the wing along with the Rx, a Runcam up front, and going to try my hand at laminating, which should stiffen the wing up a lot!
With this I have a spare carbon rod, about 2-3mm which will fit inside the supplied rod to stiffen it up.

Videos to come, and will also do another write up of the FPV flight
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Old Jul 28, 2014, 01:45 PM
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Hi Dodge,

Nice build log, thanks.

Good comments about the kit, positive and negative,

1, The CofG is 190mm from the tip of the nose, as there's no tip on the FPV version, thats not much help, i will change the manual to 170-175mm.
2, I have been flying my Falcon with standard elevons, bendy as they are, i can't see any effect.
3, I will look at the skid plate, see if it can go thicker

4. Flexibility, we really recommend laminating the leading edge, especially if your loading up the plane with gear, it make an immense difference to rigidity and makes it even more crash proof.

If you need some lam , get in touch and i will send some foc

Cheers Rob - Flyingwings
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Old Jul 29, 2014, 11:52 AM
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Quote:
Originally Posted by robflyingwings View Post
Hi Dodge,

Nice build log, thanks.

Good comments about the kit, positive and negative,

1, The CofG is 190mm from the tip of the nose, as there's no tip on the FPV version, thats not much help, i will change the manual to 170-175mm.
2, I have been flying my Falcon with standard elevons, bendy as they are, i can't see any effect.
3, I will look at the skid plate, see if it can go thicker

4. Flexibility, we really recommend laminating the leading edge, especially if your loading up the plane with gear, it make an immense difference to rigidity and makes it even more crash proof.

If you need some lam , get in touch and i will send some foc

Cheers Rob - Flyingwings
Hey Rob =]

Cheers again for the kit,

No problem, well I'll hopefully have a play this weekend if not next and try find a good 5mm margin on the CofG =]

Yeah the elevons do work fine, mine still have some flex in, any faster than the 1800kv and might need some stiffening up

There was a pack of lam in the kit, so will hopefully get round to doing it next week and give another follow up,

Cheers again
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Old Aug 01, 2014, 05:50 PM
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Maiden footage

Falcon FPV Maiden - Flyingwings.co.uk (0 min 0 sec)
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Last edited by DodgeRC; Aug 02, 2014 at 01:30 AM.
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Old Aug 18, 2014, 05:02 AM
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After getting out again this weekend, I have managed to find a nice balance for flying.

This involved having the 2200mah 3s 25-35C forward and an extra 100g lead weight in the nose with the mobius and flight cam,

AUW : 800g
Working CofG: 175-178mm (From leading edge of foam
Motor: NTM 2836 1800kv
Prop: 6x4 (7x5 next time)
Battery distance from LE (Not ply cam mount) - 75mm

Mobius footage below, considering I flew it in 15mph winds with some heavy gusts it flew really well! Now looking forward to a nice days flight.

Falcon FPV - windy! (4 min 31 sec)
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Last edited by DodgeRC; Aug 19, 2014 at 12:52 AM.
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Old Yesterday, 01:05 PM
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https://www.youtube.com/watch?v=OxbV5fRwtZc

Less windy =] Very nice to fly!
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