Permand

streetforcegp2

Sorry to hear about your heli........
but you may not give up so easy. It sounds to me like your tailrotor servo or gyro was reversed.
Don't you have somebody near you who can help you with your heli and look if all is setup correct.
Do you not have a RC-Club (or what is it called) near you, if you have maybe somebody there can help you.

Head up and move on........don't give up so easyli!

Best regards
Per.

W37 Cepeda

I'm sorry to hear about your "mis-hap".

With what you described, it seems to me, that the gyro could of been set in the REV mode. This will
cause that sudden spin after to you rev up.

Let me ask you this, Do you have AVCS mode active? and did you have rudder mix mode active?

If you had both on, on the remote..it will cause this disaster for you. The rudder mix mode will keep

the heli stable thru the low RPMS.. then when you rev up, gyro takes over, and completely over powers

rudder mix function, and if the gyro is not set properly on the direction it should compensate.. you get

exactly what happend to you.

Don't give up. You can make that heli fly. I will post a video of my Df37 later today showing some nice hovers and fly bys.

Let me know If I can help you further.

W37 Cepeda

W37 Cepeda

OK here it is, Maybe the 1st Walkera Dragonfly 37 video on YOUTUBE in US.


AND THIS IS POST 1000 FOR THIS FORUM!

I have not seen other videos..oh well, plenty of df60s... I could be wrong.

Here is a well calibrated DF37. With metal head and tail, lipo brushless ESC.

Almost hit a building, but you that scare was worth it. It shows how much control you can have.

I show some hover.. high hover, tail spin, a semi figure 8 flyby and a punch it, all in windy conditions.

Dragonfly 37 RULES!

http://www.youtube.com/watch?v=pYjKMmKp2RE

Permand

W37 Cepeda,
just saw your video........very nice

Per.

streetforcegp2

cepeda,

the gyro was not active,i had it on the normal mode.
dip switch #1(elev),4(rudd),6(pit),7(rudd mix),8(nor/cpm) and 9(ccpm. elev). are the dip switches set correct?
do i need to upgrade anything? right now im using the elf hobby brushless system w/10c 2200mah 11.11v li-po and elf servos, im still using stock rx/tx and head and tail....
i aint a quiter....im gonna keep trying till i get it hovering.....

thanks everyone

W37 Cepeda

That should do it.

lets get the gyro working in AVCS mode.

you should fly like this, shut off rudder mix function. turn on the AVCS.

Put gyro in normal mode, you sould have the servo rudder system dead center. the rudder blades should have no compensation to the right or the left.

once you got the servo and rudder system centered. verify the gyro is compensating the proper direction. move the choper jaw to the left, the gyro
compensates to the right...you move the jaw to the right, the gyro compensates to the left.

once you have the corrected, by just moving the entire body by hand so that you can see it doing its function, if its backwards, use this rev / nor switch
on the gryo to correct it

set the gyro to AVCS mode.. on the control , switch the rudder mix off on the remote dip settings. adjust the sensitivity on the gyro start at 40 %.

try to hover. bring up the speed slowly..



cepeda,

the gyro was not active,i had it on the normal mode.
dip switch #1(elev),4(rudd),6(pit),7(rudd mix),8(nor/cpm) and 9(ccpm. elev). are the dip switches set correct?
do i need to upgrade anything? right now im using the elf hobby brushless system w/10c 2200mah 11.11v li-po and elf servos, im still using stock rx/tx and head and tail....
i aint a quiter....im gonna keep trying till i get it hovering.....

thanks everyone
[/quote]

streetforcegp2

i have the tail centered and i'll try to hover tmr cause its dark overhere already......i set the gyro to avcs and when i throttle up w/motor disconnected the tail slider moves to the right if ur facing nose of heli......is that correct.....i'll try to get a video so u can see wat is really going on....

also if the gyro is set to avcs mode does the dip switch #12 still function or no? or is it only use when gyro is set to normal mode???

thanks
eddie

W37 Cepeda

Ok.

This is how it works. DIP 10 -12 are for programming the remote. You must do this with the remote on the v1 and v2 set to the center position (0).
and ONE SWTICH AT A TIME.

This is asuming you are mecanicly aligned. do these steps


1 . Set the gyro to AVSC mode. make the sensitivity on the gyro 40%
2. You wont need rudder mix anymore. With the remote turned off set the DIP #7 to the off position.
3. make sure you have v1 and v2 set to zero. Turn on the remote. and the apply power on the heli.
4. Dip # 12 switch to on, (carefull dont push the throttle). The walkera logo will change color. your in programming mode for Gyro Sens and Rudd MIX.

5. v2 is the sensitivity setting. Try -50 on the V2 knob. for v1 the rudd mix. this function is different when you are on AVCS mode. It adjusts the center position of the gyro.
if you see yourself always compensating to the left or right to keep the tail facing you, v1 will adjust that for you, for this try -40 on the V1 knob.

6. Once you with find the proper settings, then you will switch back the DIP 12 to the off position, and this will record that setting into the memory. then you may power off the remote.

If your heli spins out of control, that means you are reversed, switch from NOR to REV, or vicaversa on the gyro. If you do this,
you must re-adjust your mecanical center again in normal mode.

Good luch

W37

streetforcegp2

k i'll tell u the result later on.....

Permand

W37 Cepeda
nice work you are doing for streetforcegp2..................hat off and a low bow

I have 2 question for you
How much clearance do you have betwen the nylon gear wheels for the tail-rotor drive? I my opinion there is a little to much, but it is not adjustabel as far as I can see.
How tight is your tail-rotor belt?

Per.

W37 Cepeda

The gear should have a bit of separation.. just like your motor pinion on the main gear.

It is advisable you insert a piece of paper between the gears, as to that thickness of this piece of paper, will give
you the proper clearance.

The belt drive should not be tight..,,hence this will cause strain on your motor and lower
your fly time. It should tight to the point were you can spin the rudder manually a feal that
it does not skip. You spin it so that then main blades and motor will move.. This will offer
resistance, and if you feel skip during that, you're a bit too loose.


W37 Cepeda

Permand

W37 Cepeda

Yes, between the motor pinion and main gear I can adjust the clearance, but not on the tail-rotor gear.
I have almost 2 pieces of paper clearance between the tail-rotor gear wheels.
The gears are brand new - they have never turned - only by hand.

W37 Cepeda

Thats ok. That clearance is not a factor at that position.
Remember, you have large gear spining a smaller gear, so it's not
a problem unless its skipping teeth..

W37

cop

Hi everyone,

I am new to helicopters and this forum. I have thrown myself in at the deep end and bought a Walkera 37. I am very pleased with it and have managed to get it to hover for about 5 seconds without crashing which for me is very good.

I was wondering if anyone can help me. I am wanting to upgrade some of the parts on the 37 as they are a little flimsy. Is there a metal head and tail upgrade for the 37 as there isnt a shop in United Kingdom that has one and they cant really give me an alternative. One says one thing the other says another.

I would be very gratefull if someone could help, Thankyou.

W37 Cepeda

All you need to do, is do a search on this forum

for upgrades, like metal head, metal tail. servos, ect..

Most of us installed the Align trex head on the Df37.


W37 Cepeda

cop

Hi W37 Cepeda

Thanks very much thats been a great help. I was told that the T rex head wouldnt fit, what do they know.

Thanks again

COP

W37 Cepeda

Apperently they know didly squat!

Here's my Df37 with the Align head.

streetforcegp2

rcandme sell a metal head for the df37 but a bit pricey.......ehirobo (metal tail, etc..) and besthobbysites got lots for walkeras.....rc hobbie guy got some align parts.....

streetforcegp2

cepeda,

thanks my heli flew on normal mode cause avcs quit i guess b/c of low voltage....heli flew bfore i ran out of battery...

thanks
eddie

W37 Cepeda

Some Pics of the Electronics I use on my Walkera Df37.

1. Walkera WK-0701 programable Transmitter and PCM-FM RX701 7 channel reciever.
2. Reciever and transmiter has been caligrated exactly to the frequency set on the xtral.
3. The reciever uses a Tuned 72mhz RC Revolution Base loaded antenna, already included.
4. Transmitter comes with Rechargable batteries with a Futaba remote control charger.
5. Unlike the WK-0601 transmitter, you can adjust the AVCS function soley on the remote and activate between normal or AVCS by switch.
6. 100% compatible with Walkera G007 Gyro, JR head hold Gyros and the G401 by futaba.



W37 cepeda

armycopter

Cepeda -

Loved the video! I wish we had the weather up here in the Northeast to fly when we want to. It's been cold, rainy, and miserable. Plus its dark by the time I get out of work. You look like your pilot skills are progressing pretty well. You're definitely better than me. I get too nervous when my heli is 20-25 feet in the air. I generally keep it about eye level as I do short circuits. I had a problem one time when I high gust of wind took my 37 and blew it over my head (and of course I crashed before I could turn around and get my bearings!).

I just ordered some HS-65HB's for my Rex. Should be here soon. I'm giving up on the HS-55's.

-Army

johnchu_hk

Cepeda,

nice parking lot. look very big flying field for you.

W37 Cepeda

Thanks Army.[]

I just had another DF37 crash with the new AR-6000 Spektrum reciever. For some reason

I could not get the same feel as the Walkera remote. Well I got too comforable,

I was flying around 30-40 feet high doing circles and 8' ect ect.. and I clipped a tree branch as

I as bringing it down..the Copter broke into a million pieces! The boom separated, bent boom, kill

all the servos, bent rudder servo mount holder, crack hs-56 servo, killed all the blades, broke the frame in 4 places,

busted the lipo battery, cracked tail stablizer... and of course, huge amounts of branch debree.

Lesson to be learned: DONT FLY NEAR TREES, SPECIALLY IF ITS WINDY! DARN IT!

TO get me flying again,
I will have to buy: new frame, new boom, 4 servos.
thats not bad.. and I will install back the original electronics.

So stuff I posted before is not forsale.
Another lesson to be learned: IF IT'S NOT BROKEN.. DONT FIX IT.

armycopter

Sorry to hear about your crash. I'm surprised that the Spektrum didn't work for you on the DF37. I would think it would be perfect. Oh well, your DF37 looks about like mine

Time to go fly the T-Rex!

By the way, anyone know where I can find a cheap version of Realflight G2 (not G3). I don't need the control box. Thanks

W37 Cepeda

I'm sure with patience I can get the same feel of control
on the spektrum reciever, I just don't have the patience. My Walkera electronics
was working fine...I should of left it alone..

well... i'll try again at a later time.


W37 Cepeda