Buffalo FX-79 Build - maiden/re-maiden crash, 3rd time lucky

Billy_boy_2010 · July 06, 2015, 01:24:28 AM

Hey that's excellent!

To what do you attribute the success this time?

How large a battery was she carrying?

I really need to get my head around the in flight tuning. It seems very effective.

CurryKitten · July 06, 2015, 01:30:03 AM

Not trying to throw it, but instead FBS just pushed it forward... if anything downwards. This let us get the power on and get up in the sky. We also did this in STAB mode, as we hoped this would deal with any tendency to nose up

It only had 5000mah in there, it should carry 10,000 quite comfortably though.

I don't really have much of a clue on the in-flight tuning either, Rich just told me what he thought, and we kept trying things until it was smoother :)

highlander · July 06, 2015, 02:37:21 AM

Congratulation lads ! It was painful watching that beautiful bird crash, must be real pleasure now you;ve got hang of it. We need next milestone 40 km. ;)

Brucey · July 06, 2015, 07:26:28 AM

Nice one wayne! Glad you finally got it up

Coyote · July 06, 2015, 07:52:09 AM

About time lads ! :) :) :)

Well done getting it finally of the ground guys

rob.thomson · July 06, 2015, 09:19:59 AM

Looks to me like the launch fiver holes are behind the cg.

Causes a pitch up!

Glad all working now.

Coyote · July 06, 2015, 09:22:54 AM

So are we all in agreement that the cause all along was the launcher then ? :)

Jake Bullit · July 06, 2015, 09:28:15 AM

:terrific: :dancing2: :yahoo: :pint: :pint: :rocks: 88) :grouphug: :gotit: :flying: :party: :clap: :thumbsup: :terrific: :bravo:

jt · July 06, 2015, 09:40:11 AM

Glad to see you got it flying and didn't have to take it away in bits again! 88)

Flyboysee · July 06, 2015, 09:57:32 AM

Quote from: Coyote on July 06, 2015, 09:22:54 AM
So are we all in agreement that the cause all along was the launcher then ? :)

(What a lil' biaatch :) )

Although this is Wayne's plane I must say I, and my reputation were pretty heavily invested in this flight. The launch should be absolutely straight, and then lowered to compensate for wind, so perhaps every km of wind it's maybe ish a little down, and as you see it gets it's own legs pretty quick.

What Wayne didn't mention is that every time I grabbed hold of it to launch I double checked to see that he had his thumb locked down on the throttle. Last count, 10 fingers! Yay, Holly has a piano teacher still :)

I read somewhere about someone launching this wing solo? I'd love to see how it's done! It's a damn pity though that we never tried Auto Launch, but I suspect with full power and 20% up combined with STB it should (???) take off, provided that thrust kicks in pronto. If it did work it would make for a very different take off and not the gentle shallow climbs we saw here. The motor and prop is not a screamer, but there is a fair amount of torque and thrust behind it.

Rob, I think you're right (check with Wayne?) that the holes are not quite the CG point. Whether they are or not, I can't see how they can be used for launch anyway because they are so big - good enough for a hand hold yeah, but once the wind gets under it, one's little fingers are not strong enough to keep the nose straight, or slightly down.

Gonna have to keep it for special occasions and fly with a mate I think.

+1 to those who said this plane is for range!

Anybody else notice zero tail wag?

I dig it, well done Wayne!

CurryKitten · July 06, 2015, 10:26:29 AM

Quote from: Flyboysee on July 06, 2015, 09:57:32 AM
I read somewhere about someone launching this wing solo? I'd love to see how it's done!

I can't believe you've not come across the very squeaky voiced Jase, friend of the BMsweb guys. He seems to launch this no issues making it look very easy indeed.

! No longer available

Flyboysee · July 06, 2015, 10:47:39 AM

That's a BIG BIG run up! Rather you than me - that's a BIG BIG prop!

UAV Aviation · July 06, 2015, 10:39:24 PM

:gotit: :gotit: :gotit: :gotit: :gotit: :gotit: :bravo: :bravo: :bravo:

rob.thomson · July 06, 2015, 11:13:41 PM

Question. ..

How does it handle it's stall ?

I just wonder if the pitch up on launch is the cog being too rearward?

KillerDave · June 05, 2016, 01:01:41 AM

Hi guys....
I've not had my FX-79 for long and my maiden went very well....
2 flights later I drove it into the ground.... Flying again now so all good but...

I launch solo... I would say you need a good lump of throttle and a smooth, javelin style throw... as soon as you let go, get on the sticks and pull up.... not too hard just enough to keep her flat and level....

This this is a dream to fly, it's just that launch.... :+