flyjunkie

Hi I was just wondering how you guys do flat spins and harriers and where you have your C of G positioned. The plane i am trying to do this on is the 40. size funtana with a Saito .82 but i feel the C of G is just to far forward any help would be helpful!!!!!!!

daveopam

My Feedback: (9)

Mine won't harrier W/O spoilerons mixed in. Even with the mix it wing rocks a little. W/O the mix it wing rocks alot. My CG is at 6-1/4" right now. I have had it as far back as 6-3/8". It will 3D better at the 6-3/8" but is very difficult to land in the wind. Flat spins are also greatly helped with spoilerons. Although most of my flat spins are done at the bottem of a blender.
Mine is also .82 powered. I run the cowl and wheel pants and have a 1300mah JR pack behind the wing hold down to get this CG. Picture forthcoming.


David

daveopam

My Feedback: (9)

Inside fuse pic



David

daveopam

My Feedback: (9)

One more time

greyhound man

My Feedback: (5)

mine is also .82 powered and with spoilerons harriers ok, less wing rock in inverted harrier, dont remember where the cg is, but you do have to give it constant down elevator to land, flies great though. to enter a flat spin i usually dive let it rotate 3-4 times (aileron roll) and then apply full elevator and rudder and power to pull it flat and a little opposite aileron to keep it from dipping a wing and it does an inverted spin better than upright.

LuisCastillo

i have the same problem, someone can tell me how i can make the mix of the spoilerons, i have a futaba 6XAs.
Thanks!

Fletch124

My Feedback: (7)

If your wondering how to do a flat spin I would be more than happy to explain it to you.

E-Mo

My Feedback: (12)

Hi daveO

can you post more pics of the cowel
with the eng,just want to get some ideas
before i tear into this::::::::::::

LuisCastillo

hi fletch, i try to do the flatspins, but i dont know how much the spoilerons can help me to do better the flat spin, help me!
i make a flat spins but not too flats jeje.. the nose always drop, i think is nose heavier or i make some wrong.

Thanks!

Fletch124

My Feedback: (7)

spoilerons will do absolutely nothing for flat spins. First off your going to need to be on your max rates for elevator and rudder. Tell me what your stick movements are for flat spins please.

daveopam

My Feedback: (9)

E-mo, Here is a pic of the .82 in the cowl. Notice however I am running the old style of muffler. I just bought this one from Horizon. Thet still have stock but I don't know if they have the bent header pipe you will need.


David

E-Mo

My Feedback: (12)

thanks dave0.

i nose over ,add full left aile
chop throttle
go right rudd
so the sicks are crossed
add full down elev
as the plane begins to rotate
i center the aile, add power
also start to feed in some right aile
or it might flop out of the spin
make sure to give yourself plenty of time, center
the sticks, once the sticks are centerd the spin will slow down
pick a spot to pull out...good luck

spratrbo

My Feedback: (28)

I have a 90 Funtana and HAD a 40 Funtana... I am at stock CG locations with both planes. I found the 40 to perform flat spins much better. Trick is with the 90 on the inverted flat spin I am getting about 50-55 deg of throw which helped flatten it out big time. 40 size was not quite that much throw but almost. You will find more harrier wing rock on the 40 size but this also depends on your weight. 90 does it too but not as badly. And ofcourse inverted harriers are much easier to control.

Just a few tips before you go tearing through everything. Try to get more throw first. And I always prefer using a longer servo arm vs. moving the linkage closer to the hinge line. After that move the CG back. If you try to harrier with no throttle and pull back completely on the stick and the fuselage is just horizontal to the ground with 45 deg of elevator throw... move the CG back. Ideally with full up elevator and no throttle you want about 20 deg or so alpha attitude.

Good luck!

JP

Fletch124

My Feedback: (7)

If you start adding right aileron then it flop out of the spin.

Also try it the opposite way. get in a good vertical climb then at altitude chop the throttle
Nose over, hammerhead over what ever you want
start wrapping it up with right aileron
then at the same time go to full down elevator and full left rudder
this will develop a pretty quick snap
then while holding everything else start slowly pushing the aileron to center
its all about finding that sweet spot with your aileron
try it and let me know via PM

LuisCastillo

here's a pics of my cowl E-Mo

flyjunkie

Big thanks to Daveopam i took your information about the C of G and tested the Funtana and it did the flat spins really well i Have not had chance to test the harriers but i hope they go just as well as the flat spins Thanks mate

daveopam

My Feedback: (9)

Your welcome. Now try a few Walls and Waterfalls. A down wind Wall is a sight to see.



David

flyjunkie

Hey man what the hell is a waterfall?

daveopam

My Feedback: (9)

I will try to describe it. And it may be called something else in your neck of the woods. Start with the plane upright at idle. Keep adding up elevator till it is just about to stall. Then add full down/full power/ and a little rudder to keep it straight. The plane will start to tumble end over end very quickly. It will also loose ALT fairly quickly. This trick is also helped with spoilerons but with enough power will do it without them.
I believe there is a video at the site below from one of your fellow countrymen.

David

www.3drc.info/

flyjunkie

Thanks for the info mate i will try it next time i can get the old man out of the house and to the field!!