Flyingwings Falcon EVO FPV

[iwan_canobi]

Cheers guys. Hmm, I may be buggered in that case, had a look and my zippy 3000's are 2cm longer than the 4000Mah multistar, and also a bit heavier. I only had planned that as that is what I use in my scratchbuilt effort and I have loads of them.

So looks like I may need to order some more batteries in that case.... :( I'm planning on using the Xiaomi Yi as HD cam and a board cam also, so I guess I'll need smaller to keep the weight down anyway. Will have a look at some 2200 4S's I suppose, if that will get me 30 minutes I suppose I won't need that many anyway as my flying windows are usually short. Falcon should arrive today so I'll measure up the bay and make sure I get something that will fit properly!

Will look at 1200kv motors as well. Cheers for the advice guys!

[Billy_boy_2010]

If you have to buy new batteries anyway do consider the 3s 4000 multi stars.  If you ever bin the falcon and don't want them again they will be pretty handy for ground stations etc- unlike 2200 4s which are a fairly rare size.

do you have standard 4s 3000 zippy? Not the compacts? I have lots of them too and they are huge and much the same weight and size as the 4000 compacts. I bought lots when I first moved to 4s but I don't like them that much now tbh.

I have a few components behind the CG line- you may find she still balances with just a HD cam up front.

[iwan_canobi]

Cheers Billy, I kinda want to stick to 4S really though, as I could potentially use them in other planes as well. I've got an old FT foam board spitfire that would be a rocket on 2200 4S! :)

£11 from UK warehouse as well so will stick a couple in the basket.

[BlueFlyer]

hmm, if you want to use big 4S packs you should have got the Venturi.

Falcon is tried and tested as a brilliant machine on the 2200kv motor with 6x4 prop, or the 1400kv motor with 8x4 prop, both on 3S.

It was designed with a 2200mah 3S in mind because it's the most common size LiPo out there, the 4000mah 3S multistar is very close in terms of dimensions, that's why it too is used.

If you start messing around and making the falcon evo too heavy, it won't be worth flying.

the 2200mah 3S LiPo I use in mine (21 minute flight times I might add) is the cheapest one hobbyking sells... only £7 each... 20C gives a max draw of 44amps, I barely pull 16amps so anything more expensive is a waste of money.

buy 4 x 2200mah 3S LiPos from hobbyking for just under £30 and you'll have a good couple of hours at the flying field if using the eco power set

[Billy_boy_2010]

Have you seen the 2200 4s packs before blueflyer? They look almost the same as the 2200 3s ones just a bit thicker. The 3000s are much larger.

I have just checked with a turnigy 2200 4s and it fits comfortably in the front of my falcon with about 1cm spare in length. I would imagine its a similar weight to the 4000 3s multistars.

I take your point about not wanting to make it too heavy- but even with a HD cam and an autopilot taking mine up to 800g I'm already keen to use a 4000 3s multistar to up the weight a bit so it can handle the wind a bit better. Keep it under 1kg and she will fly great I reckon- I should be kissing 900g with a multistar.

Let us know how the 4s setup goes Iwan. But IMO the falcon makes a great all purpose wing (rather than a pure speed demon)- it would be easy to ruin it if you go for raw speed. You may as well buy a skyfun if you want that. But with clever motor and prop selection may well mean you have a pretty efficient setup at tickover but has the 4s punch if you're in the mood for speed or aggressive climbing! I have never really got my head around motor/prob stuff though :D

[BlueFlyer]

Yes mate, I actually had several of them, nanotech ones for my radjet ultra (before I sold it... with the LiPos).

My point was about big 4S packs, the ones that Iwan was saying he wanted to use.

I therefore stick to my words when I said "if you want to use BIG 4S packs you should have got the Venturi"

Just weighed mine and it's 912g AUW... thats fully laden with:

GoPro 3
Vector OSD
4ch Lite EZUHF rx
IRC600 5.8GHz VTX
30A ESC
1400kv motor
8x4 prop
2200mah 3S LiPo
and more importantly.... no dead weight/ballast

Flys perfectly, so I reckon the extra weight of the 4000mah 3s multistar would be fine but may make it a tad nose heavy... which is preferable to being tail heavy.

[BlueFlyer]

remember if you want to go 4S you need a bigger (and therefore heavier) motor that is rated for 4S, and a bigger (heavier again) ESC.

it's not just a case of throwing in a bigger LiPo... that's not the only factor to take into account. If you want a 4S wing that can carry big 4S LiPos then don't buy the Falcon... buy the Venturi, there's not a lot of difference in price between the kits, especially if you then go on to spend mucho £££ on the stuff to go in it.

[iwan_canobi]

All points taken on board, I was only planning that as I have plenty of the packs and thats what I use in my scratch built falcon evo (pretty much exactly the same from what I can see, I built it before the falcon evo was available - http://www.fpvhub.com/index.php/topic,22361.0.html). I'm not planning a speed demon, was just wanting to make use of the kit I already have. I have already built a Venturi EVO but it was too big for my liking, and was too much money in the air for me. I bought the falcon evo as my scratch built one is looking a bit worse for wear now.

I still think I want to go 4S purely in terms of efficiency. I have a 30A ESC which should be plenty I think (again thats what I use on the frankenwing), and if I can keep the weight under 1kg then I should be golden hopefully. The 2200's are about £11 so no biggie. I have a Tornado OSD waiting to go in as well.

What servo's do you guys use? Was thinking 9g metal gear Turnigys would be fine?

[iPeel]

Yeah, the Turnigy MG90S is fine. I also went for a 4S setup to use the same batteries I use on my 250 and think it works great, I use a plush 25 and a T-Motor 960Kv.

[Billy_boy_2010]

Blueflyer I only asked you if you had seen the 2200 4s as you continued to talk about the cons of big 4s packs in the falcon after iwan said he had bought some 2200 4s. Fair point I missed your emphasis on the word BIG 4s packs although I think by then iwan had dismissed using them.

You can get 4s motors which are a similar weight to the 3s stock motors and the stock 30A esc would be fine. It sounds like iwan intends to keep the weight very similar to stock and just run a 4s setup.

You and I have near identical setups it seems- although I run a 7x5 prop as it came in the kit. Mine pulls about 16A too from memory. It would be interesting to see how the two compare but ecalc doesn't seem to have our motor on its database.

I take your point though that it's easy to ruin a plane by increasing everything. I did this with a tek sumo by trying to run a 3000 4s in there. I cut far too much foam out of it to fit the battery, so had to add loads more weight in strength, and it was never right and crashed hard!

Re the servos iwan- I just bought the ones with the kit. They are 9g MG ones I believe.

[iPeel]

The 2826's are on eCalc BB, but for some reason it only displays them every now and then and for different variants of the same motor (1400 / 2200) you need to flick to another manufacturer and back to Turnigy. It does the same thing with e-flite motors.

[Billy_boy_2010]

I think it's their way of encouraging you to buy the full version.

Although I did it a dozen times and couldn't ever find the Rtimer model? Which is a 2212/10.

Unless you're saying Rtimer is a rebranded turnigy?

[iwan_canobi]

Well I just got my hands on mine today as I was out of the office yesterday when it got delivered, and I can now see why my batteries wouldn't fit! Its a lot smaller than I had in my head for some reason! Certainly a lot smaller than my scratch built one. This is good though, means it will be nice and portable!

Looking forward to starting the build, need to get my house move next week out of the way first though. Gives me time to think of a design scheme.... :D

[iPeel]

Gives me time to think of a design scheme.... :D

He-Man this time is it?

[iwan_canobi]

Now theres an idea.... :D