bimmer

Hi everyone, got my first heli not too long ago.

My setup is basically the Calibre 30 with 204Gyro (which i've been adviced by almost EVERYONE who flies a heli to change to the 401) , and also a Futaba 6XHPS radio.

Upon comparison of my calibre30 with the guys' down at my clubs, i noticed they seemed to be using the MMS settings, while I'm using the EMS settings.

I'd like to check with you guys, what's the difference btwn MMS and EMS?

When I tried to set the Futaba radio from PCM to PPM mode, the servos dun work. I realized that the receiver only caters for PCM.

randy41

MMS is mechanical mixing system.
EMS is electrical mixing system.
Without going to a lot of detail. The only major difference
is with the EMS you have to have a radio that supports
a EMS setup. EMS system uses less moving parts and there
fore supposed to be more cost efective.

Your radio must be in pcm mode if you have a pcm reciever
in order for the receiver to work. Same with ppm reciever
your radio must be in ppm mode.

bimmer

]

thanks for the help

so what should function should i be looking at , in the radio, to be able to set the radio to function like the EMS system ?

randy41

what type of radio you have ?
Got to go take a shower. I will be back.
I need more info on your equipment.

bimmer

i'm using a Futaba 6XHPS.
Apparently the shop that I wanted to , gave me a "best" deal over here in Singapore.

Gave me a Calibre 30 & Futaba 6XHPS & 204 Gyro & Gas and the odd parts needed.

Costs me S$1400 here in S'pore, which works out to be around USD$800 + - .

When I joined a local flying club, they told me the 204 is almost good for nothing. I needed to change to the 401gyro at least. He then took a look at my radio and said that the radio's functions are limited. Need to upgrade as well. All in all, will cost another S$1K...

The guy who helped me set my heli also just opened a RC hobby shop last week. When I asked him for a quotation, he quoted me S$1.5K, for all the necessary good stuff that's needed to fly.

Imagine how fed up I felt. For a S$100 more, I could get a much more flight-worthy setup... And now I've to blow another $1K to upgrade them...

randy41

First of all the gy-240 is a good gyro and the 6xhps
will do the job. Now you will be looking for swah setting
in your radio and should be set to sr3 type for EMS on the
caliber 30. Your radio will take some time to set up.
Do you have the manual for it.

bimmer

yah i do have the manual for it.
So I guess setting it to SR3 will do the trick ?

bimmer

i was told the 240 is pretty horrible for a first timer and i ought to get the 401..

randy41

Yes the sr3 will do the trick.
The gy-401 gyro is better. But the gy- 240 is by NOOOOO
means horriable. Look you are a beginer right. You have
already spent money right. You have enough to learn
with for a beginer. WHY SPEND MORE MONEY.

Now: IF you have plenty of money, than you could get
a lot better equipment.

I know nothing about Singapore LOL.

bimmer

hmm alrightey.

i'll get it checked out.

btw, do you think the price of parts here in Singapore are expensive comparatively ?

bimmer

finally gotten my heli set up in the EMS settings and also managed to set the radio up in SWSH 3 mode

basically juz need to get a new pair of new main blades and i should be flying soon again !!!

randy41

bimmer: Great jop !
Be sure you double check everything.
Make sure that the swash plate is moving in the
right directions and that the tail rotor blades are on right
and gyro working in right direction and so forth.

bimmer

hmmm
something's wrong

my heli's vibrating rather badly when the blades are spinning.

and i believe, when i push the control forward, the heli's supposed to move forward right ?

somehow it's reversed and when i reverse that channel, the whole EMS setup seems screwed!!!

randy41

The best way i know how to tell you on which servo or servos
to reverse. Is do them one at a time. If you got the helli tail
pointing at you chest and the nose pointing away from your
chest. Left alerion should make the swash plate on the left
go down and on the right go up and vise verse. Keep in mind
that in order for this to happen you will have the alerion and
pitch servo moving togeather. Left input will make the alerion
servo move the left swah plate down and at the same time the pitch servo will move the right side swash plate up and vise versa. The foward will make the front of the swash plate move down and back will make it move up. The collective will move all
three servo at the same time. Full collective moves the whole
swah plate up and vise vesa. Now to findout witch one or all of them. Just hook one servo up at a time and make sure its doing what its supposed to. You can change servo directions one of two ways.
1= swash 3 setting, The -65 elevator, -65 alerion, + 65 pitch
can be switched +65 elevator, +65 alerion, - 65 pitch you
can just change one if needed.
2 = use the reverse servo feature.


The vibrating could be from blades out of balance or not tracking right or to low head speed. Check the Balance/tracking first.

bimmer

Sorry for my ignorance, but how do I check the balance/tracking ?

randy41

To balance heli blades you realy need a blade balancer.
There is other conventional ways. But i dont know them.
You could get carbon fiber blades. They are usually pre
balanced. They also cost more.

Blade tracking is done by putting tracking tape on one
blade and reving the helli up to were it starts to get light on its skids. Then you look at the blades from the side or back
eye level and both blades should be in the same plain.
It will look like one blade if tracking is right. If not you will
see the blade with the tape on it and it will either be high
or low. You have to adjust the link arm on one of the bladegrips.
Usually the blade that is low this link will have to be turned
out(counter clockwise). I use a water paint and i also
put a mark on each blade.(one on the outer edge of one
blade and a mark about 2 inches in from the outer edge
of the other blade. It makes it easy for me to tell which
is which.

bimmer

hmm okay

juz went down to the shop to get the main mast as well as the spindle stick

apparently the spindle is the one that's damaged during the previous crash

now it's going fine

no more vibration.
smooth as silk!

time for the practise!