BlueFlyer's Skywalker 1900

[BlueFlyer]

No build but thought I'd throw up some pictures of my new Skywalker 1900 before the maiden (just in case it's never seen again in this condition... or at all lol)

Specs:

Skywalker 1900 (HK UK warehouse)
SunnySky X2820-6 920kv motor (don't be fooled by the designation, this is a powerful 35mm motor)
Aerostar 60A ESC (the only 60A ESC in UK stock with programming card also in stock at the time)
Graupner 9x6 Aero-naut CAMCarbon Power Prop
5000mah-8000mah 4S LiPo
TGY-50090M metal gear servos for the tail surfaces
TGY-4409MD metal gear servos for the ailerons
EzUHF 8 Ch Lite receiver with home-made dipole antenna
600TVL 5-22v Plastic cased FPV camera (my go to camera)
EagleTree Systems vector flight controller/OSD
Fox 800 1280MHz VTX

[Billy_boy_2010]

What wattage is the motor? How large a prop is it spinning?

Looks like it will be capable of some serious range if needs be :)

[helimadness]

No build but thought I'd throw up some pictures of my new Skywalker 1900 before the maiden (just in case it's never seen again in this condition... or at all lol)

Specs:

Skywalker 1900 (HK UK warehouse)
SunnySky X2820-6 920kv motor (don't be fooled by the designation, this is a powerful 35mm motor)
Aerostar 60A ESC (the only 60A ESC in UK stock with programming card also in stock at the time)
Graupner 9x6 Aero-naut CAMCarbon Power Prop
5000mah-8000mah 4S LiPo
TGY-50090M metal gear servos for the tail surfaces
TGY-4409MD metal gear servos for the ailerons
EzUHF 8 Ch Lite receiver with home-made dipole antenna
600TVL 5-22v Plastic cased FPV camera (my go to camera)
EagleTree Systems vector flight controller/OSD
Fox 800 1280MHz VTX

Looks good. I built one the same that never got past a few maiden attempts. It was my first plane coming from a heli background. And some of the advice I followed for the build was not great. Was never going to work at the time.

Anyway I had a 2814-1100 KV motor in it. I put it on FX61 wing with 10x5 prop and its very good. 40amp max draw on 4s which is just under 600w. Motor is capable of 700 max so bit of head room. I also brought a 2814-900 kv to get some more range out of it. Running that on a 10x8 prop max draw was about 28 amps from memory so only 400w out of 570w max. I have a 11x7 and 11x8 prop to test next time as plenty of head room on the available watts.
With the 10x8 prop I can get 60 min flight time using 5400 mah out of the pack.

The 2820-920 kv looks like max watts 750 (according to Ecalcs) At a guess plenty of room for bigger prop on it.

Good luck with the maiden. Looks like a sweet build.

[BlueFlyer]

No idea about the wattage,  specs here http://www.fpvmodel.com/sunnysky-x2820-kv920-kv800-motor_g281.html

9x6 prop is the biggest that will fit.

It's my 3rd skywalker build so learnt from my own past mistakes and kept this one simple. Built in 3 days from turning up at my door.

[mark1975]

Very nice Chris , been thinking about one of these to replace the twinstar 11 these are made for FPV

[mark1975]

Minus FPV gear Chris how much did the airframe cost with electronics etc etc....

[BlueFlyer]

Just over £120 mate

[mark1975]

Hmmmm not bad, how much mah can they take thinking of a new platform for a winter project

[FPVSteve]

im running 10000mAh 4s in mine with another 1000mAh for video gear .. tbh it doesn't notice the weight at all.

[BlueFlyer]

my old skywalkers ran 5000mah 4s, but now with the new multistar range of lipos, this will be running with 8000mah 4S and I know Steve W uses a 10000mah 4S in his.

total cost new for this skywalker minus FPV and UHF is:
Skywalker 1900 - £67
Motor - £25
ESC + programming card - £20
Prop - £7
2 x Aileron Servos - £17 total
2 x Tail Servos - £7 total

Then I suggest you buy some M2 threaded pushrods and M2 clevises from gliders-uk for around £10 posted (if you've got a Z bender) and about £5 on tape for hinges and so on.

all in then, you're looking at £158 for this exact setup.

There are of course cheaper motors/ESC/Servos available.

[BlueFlyer]

Oh, and here's the specs of the motor http://www.rcsunnysky.com/html/2014/xseries_0918/18.html

750w as per helimadness' post.

[BlueFlyer]

I've opted to have the VTX on the underside of the wing, with the antenna pointing downward.

This is because there's not only a big fat carbon spar going through that wing but there's also a carbon ribbon right next to where the antenna would usually be poking up. I'm hoping this way there'll be no way the carbon could interfere with the VTX antenna radiation pattern

[mark1975]

Cheers Chris + Steve...not too. Bad that .....Chris not taking the piss here but if you decide to sell message me like I say it's over winter project ...😉

[BlueFlyer]

Chris not taking the piss here but if you decide to sell......

lol, well it has been known for me to try something and sell up soon afterwards ;) but this is my only aircraft right now.

I sold my last skywalker to Iwan on here, he can vouch for the build quality of my models, heck... I think I've probably sold something to 80% of the people on here at some point lol

I do have a 2nd Vector OSD here with no airframe to go in... might put that up in the classifieds soon to raise some cash for my latest interest.... bushcraft/survival. Not long back from a week in the Swedish wilderness, loved it.

[mark1975]

I know id make a right shit job of building it I have no confidence in my skills atall lol