RunRyder RC
 7  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1422 views POST REPLY
02-11-2006 11:05 PM  12 years agoPost 1
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

i have tried everything. i can't get any lift from my shogun. could it be my speed controller? i have been using the same setup for a month now with no problem and then all of a sudden i can't get any lift. i installed new brushed motor, same stock pinion, but nothing.

could my speed controller by messed up? how do i test it?

here is my setup:

shogun v2
2200 lipo
electron 6 rx
futaba 7c tx
eflite maxx 25 speed control
stock 400 brushed motor
hs-56hb's all around
futaba 401 gyro
foam main blades

PM  EMAIL  Attn:RR  Quote
02-11-2006 11:06 PM  12 years agoPost 2
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

i have all the pitches correct, checked them a hundred times now

PM  EMAIL  Attn:RR  Quote
02-11-2006 11:41 PM  12 years agoPost 3
Klinger

rrApprentice

Brisbane Australia

My Posts: All  Forum  Topic

If you have the pitch then the only reason you wont get lift is you havent got headspeed. Have you tried a NEW battery. Is anything slippin like pinion or one way bearing. My bets the battery.

PM  EMAIL  Attn:RR  Quote
02-12-2006 01:11 AM  12 years agoPost 4
PacketStorm

rrApprentice

Atlanta, GA - USA

My Posts: All  Forum  Topic

I agree...most likely battery. Go to zero pitch and see if you can hear the motor/blades bog down as you apply positive pitch to the point where you have hovered (before the problem) and beyond.

Can you recall how the blades sounded as they spun before the problem? How does it sound now, relative to before?

Is the battery getting hot?

Is the ESC getting hot?


You fly...you crash...it's life

PM  EMAIL  GALLERY  Attn:RR  Quote
02-12-2006 11:20 PM  12 years agoPost 5
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

man, i have no idea what it is now, i even bought a new speed control and still the same thing. the last thing it could be is the battery. but i didn't over charge it or anything and its only 3 months old. aaaahhhhhh, i just have no lift, the blades are spinning at about half throttle no matter my trim levels, throttle stick position, throttle curves, pitch curves, etc etc etc.

how can i test my battery to make sure its not that?

PM  EMAIL  Attn:RR  Quote
02-13-2006 12:47 AM  12 years agoPost 6
nuts4rc

rrNovice

Vancouver, Wa USA

My Posts: All  Forum  Topic

I don't know for sure but on the Blade CP there is a shear in or "Jesus" pin that holds the head assembly on that if sheared will allow the blades to spin but not as fast as when it is attached and there is certainly no lift that way.

Just a thought
Russ

Thanks Russ. This is Addictive! Blade CP AEK 7CHP and a Shogun V2 now

PM  EMAIL  GALLERY  Attn:RR  Quote
02-13-2006 06:24 AM  12 years agoPost 7
Klinger

rrApprentice

Brisbane Australia

My Posts: All  Forum  Topic

If you can measure the battery voltage under load then it really shouldnt drop under 10v for lift, a good battery will have around 11v under load. If your using cheap low c rating batteries then i'm sure thats your problem. It's worth getting the best batteries (high c rating) if your looking for good long term performance

PM  EMAIL  Attn:RR  Quote
02-13-2006 01:49 PM  12 years agoPost 8
MattJen

rrElite Veteran

UK

My Posts: All  Forum  Topic

Just a simple first step, before you try anything else,

have you got the baldes on the right way and have you got the blade grips on the correct way, ie when you add collective the and swashplate moves upwards you notice the blade leading edge is pointing upwards and not downwards,

it is a simple check but i have seen alot of poeple accidently fall into this trap.

worth a try

matt

All The Best

PM  EMAIL  GALLERY  Attn:RR  Quote
02-13-2006 06:43 PM  12 years agoPost 9
Rob_T

rrElite Veteran

..

My Posts: All  Forum  Topic

and swashplate moves upwards you notice the blade leading edge is pointing upwards and not downwards
The Shogun swashplate doesn't move up and down with collective. For a Shogun you should make sure the washout base moves up and down as described.

You should definitely check you still have at least +7 pitch possible. (Some people use more, +7 is from the Shogun manual).

PM  EMAIL  Attn:RR  Quote
02-14-2006 01:22 AM  12 years agoPost 10
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

no i don't have another battery i can use, oh well, i'll just buy a new lipo

PM  EMAIL  Attn:RR  Quote
02-14-2006 02:31 AM  12 years agoPost 11
PacketStorm

rrApprentice

Atlanta, GA - USA

My Posts: All  Forum  Topic

derf9h:

Rob_T is right on the money. Only the washout hub moves with the collective servo but Mspot72 brought up a really good point. Did you double check your blade pitch direction as he suggested to make sure that somehow didn't get reversed?

You fly...you crash...it's life

PM  EMAIL  GALLERY  Attn:RR  Quote
02-14-2006 02:50 AM  12 years agoPost 12
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

yeah its correct, i have checked my pitch a thousand times, the heli gets to the point where it is on the edge of taking off and then nothing, its like it wants to take off but cant find the power.....???

its gotta be my battery because i have bought a brand new speed controller, a brand new motor, and my tx is a brand new 3 month old futaba 7c.

its not that old though, only like 3 months, but it is an off brand lipo. Its an E-Pro?? is that good, it was cheap so i bought it, maybe i got what i paid for, i'll just buy a new lipo, any suggestions on where?

PM  EMAIL  Attn:RR  Quote
02-14-2006 03:03 AM  12 years agoPost 13
Rob_T

rrElite Veteran

..

My Posts: All  Forum  Topic

ThunderPower 2100s are the proven choice unless you want to keep the weight down for 3D (although as you have the brushed motor I guess you're not concerned about 3D).

I've been very impressed with some Apex 2200 12C batteries I bought from gwsexpert.com. I bought them for a TRex but discovered they fit my Shogun (but only just- so this might be an issue depending on exactly how far your servos stick out compared to mine). They were under $50, compared to almost $80 I paid for TP prolites.

PM  EMAIL  Attn:RR  Quote
02-14-2006 03:12 AM  12 years agoPost 14
Rob_T

rrElite Veteran

..

My Posts: All  Forum  Topic

Before you buy a new battery
One last thing to check before you spend money on the battery is to make sure that the 1-way bearing isn't slipping. To do this, hold the main gear still with one hand and use your other hand to try to turn the rotor head backwards. You should not be able to turn it at all. If it turns then either the 1-way bearing (or sleeve) is faulty, or the bearing is no longer firmly stuck in the main gear (you can actually use quite a lot of force in this test, and it should still resist).

Make sure you dont bend the flybar in your enthusiasm to check this out

(I have had the 1-way come loose on both my Shogun and Eco-8. The fix is to glue it back into the gear. On my Shogun I used CA, on my Eco I used epoxy, so either should work.)

PM  EMAIL  Attn:RR  Quote
02-14-2006 03:24 AM  12 years agoPost 15
PacketStorm

rrApprentice

Atlanta, GA - USA

My Posts: All  Forum  Topic

derf9h:

Rob_T has some more good points - once you verify the one-way, everything obviously points to the battery. Like you said, everything has been swapped out with the exception of the mechanical parts, hence the check per Rob_T, so that leaves the battery. ESPECIALLY with you mentioning that it was an "off brand" and you didn't pay much for it.

The battery is probably the last place you want to skimp! Not only does it end up being a waste of money because of damage/overheating - and its eventual early replacement, but discharging a lipo beyond its capability repeatedly is known to cause them to spontaneously combust! No joke...it's not worth setting something on fire over!

You fly...you crash...it's life

PM  EMAIL  GALLERY  Attn:RR  Quote
02-14-2006 04:11 AM  12 years agoPost 16
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

well you guys have been very helpful, i really appreciate all the advice. i am going to get a new lipo from gwsexpert.com tonight and i should get it in the next couple of days. the one-way bearing held perfectly so its gotta be the battery. i tell you one thing though, if i wouldn't have such a laid-back attitude toward things, i would have burned this thing twice now, lol.

PM  EMAIL  Attn:RR  Quote
02-14-2006 04:25 AM  12 years agoPost 17
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

All above is great info but what is your throttle curve set at with the stock brushed motor? I am sorry if this has already been posted.
You MUST with the stock motor run it at all time close to max power and your pitch curves just enough to get her up . Rev that poor motor up Before your curves add pitch and then it all manuvers should be at 100% throttle. Another thing I found helpful was to breakin the stock motor in a glass of water with 3 volts of Battery power,,NOT AC regulated power. This will set the brushes. I flew a V1 Shogun very well with a TP 2100 and stock motor after setting it up well.
Low pitch and HIGH Throttle!! It will help cyclic too because of the higher head rpm's

Setup is everything, All my heli's can fly far better than I can pilot them

PM  EMAIL  GALLERY  Attn:RR  Quote
02-14-2006 08:17 PM  12 years agoPost 18
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

i've tried the throttle curve at:
a) 0,25,50,75,95
b) 0,82,82,82,82
c) 0,15,30,45,60
d) 0,85,85,85,85

so i've tried to whole spectrum, while i kept my pitch constant at 0,25,50,75,100

ok, so i got a voltage meter at work today since i didn't want to get mine at my parents house 30 minutes away, its not a digital one, but it will work.

should i just get the blades running at full speed (well full speed at the half speed the heli has been running at, lol) and then touch the testing needles to the wires on the battery or what? how can i test my battery voltage while i have it running? and what setting should i have the tester on dcv or acv? thanks

PM  EMAIL  Attn:RR  Quote
02-14-2006 08:19 PM  12 years agoPost 19
derf9h

rrNovice

TOLEDO, OHIO

My Posts: All  Forum  Topic

i even tried all those throttle curves with different pitch curves like:

a) 0,10,20,30,40
b) 0,15,30,45,60
c) 0,20,40,60,80

and nothing

PM  EMAIL  Attn:RR  Quote
02-14-2006 09:35 PM  12 years agoPost 20
Klinger

rrApprentice

Brisbane Australia

My Posts: All  Forum  Topic

if you can hookup your meter to the battery without needing to hold them on is safer. You'll need the setting VDC with a scale of no less than 12V but not too high either so you can read the voltage accuratly. Hold the heli and spool it up and put it under half load, around hover pitch. Should be holding a good 11+ volts i'd think. Anything around 10v or less is not enough for a good battery.

PM  EMAIL  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1422 views POST REPLY
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Sunday, June 24 - 10:11 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online