RC Groups - Power Systems

Help! Battery & ESC Quary

mandrek86 — Sat, 21 Nov 2009 07:18:09 GMT

Can i apply a 2S 7.4V 800mAh Li-Po battery (18C 14.4A Continious, 28C 22.4A Bursts) to a Current Constant - 12amp, Current Peak - 16amp Brushless ESC to control a 7-12Amp brushless motor? Will the battery harm the ESC? Because battery's discharge ratings are higher than ESC's one or i just need to change the ESC which has Current Constant-20amp, Current Peak-24amp range.

Discussion More rpm from brushed motor?

propjobbill — Sat, 21 Nov 2009 05:41:51 GMT

If I run a brushed motor in under water for about 1 hour will it increase the rmp's and extend the life of the motor?

Discussion Motor and ESC wires color

whatala — Sat, 21 Nov 2009 00:30:45 GMT

Hi,
Normally, the color for motor wires are red(+), black(-) and white(or yellow for neutral) and same as ESC speed control.
However, I bought some motors and ESCs, they are all the same color.
Motor has 3 black wires and ESC has 3 red wires.
How do I know which one is connect to which one?
Or any wire from motor to any wire to ESC will work, does not matter.
Thanks
Jason

Question Servo Dead Band Width

myp — Fri, 20 Nov 2009 19:41:10 GMT

What is dead band width? Many servos have dead band width of 1 to 2 micro second while others have 10 micro seconds. Which is better and why?

Discussion Need Help With Medusa Power Analyzer Plus

Billy Haynes — Fri, 20 Nov 2009 15:38:02 GMT

I have a question for the computer savvy people here. I have a Medusa Research Inc Power Analyzer Plus that I want to connect to my computer. I used it with my previous computer but am just now needing to use it with my new Compaq. The analyzer plus has a 9 pin plug but my new computer does not have this connection, just usb ports. Could I use http://cgi.ebay.com/USB-2-0-TO-9PIN-...item3efa2442ff to make the analyzer plus work? The adapter is cheap but there is no sense in buying it if someone knows for sure it wont work. Thanks.
Billy

Discussion Hacker ESC X-55-SB-Pro Auto cell detect

bleary — Fri, 20 Nov 2009 08:55:17 GMT

X-55-SB-Pro Auto cell detect
Tried this a week ago in the vendors forum,no response.Does anyone have any ideas? It is driving me mad to have to drop the packs down to arm the silly thing.

--------------------------------------------------------------------------------

Can anyone help re the auto detect on 6S.The ESC will only arm the motor after I have discharged the packs a bit(2x3S 2200 as a 6S 2200) It will not recognise it as 6S,just beeps away until I drop the voltage of the packs a bit by running them down slightly(setup with Thrust 50 in a PA MX)
Is there any way of adjusting this?
Cheers,
Bleary(who has lost the instructions)

Discussion AXi 2826/8 Li-po battery suggestions

tquill — Fri, 20 Nov 2009 04:20:39 GMT

For reference, my plane will have about a 10 pound take-off weight and is configured similar to that of an airliner with one engine on each wing. As mentioned in the title, the two engines are AXi 2826/8

I think I found the AXi guide for the motor but I'm still not sure about the details of what battery to get. For a 12X6 prop, a 3S Li-po is recommended. If I go ahead and get the 12x6 prop, what specific 3s Li-po would work (like Mah and C ratings and such)?

Would it be possible for anyone just to PM me or past a link to the specific battery for purchase? Would I need one for each motor?

Thanks for any help.

Help! sig lil rascal setup

GJ60 — Fri, 20 Nov 2009 04:01:37 GMT

hey guys...can anyone with good knowledge please help me?..I purchased a sig lil rascal w/ speed 180 motor arf...
what i need to do is get the following:

2 micro servos
1 esc
1 battery pack
1 receiver

can anyone recommend a good setup from hobbyking? im still new at all this

thanks, george

Cool Dr.Servo---Servo Speed Expert

aeo-tiffany — Fri, 20 Nov 2009 02:14:36 GMT

As the first multi-functional servo speed tester,S1 not only accurately tests the speed,but also tests the consistency of the servo,which are really widely espected by model lovers.

Specifications:
Operating temperature: -10 ℃ to 50 ℃
Weight: 21grams
Size 33x 69x 11mm
Input voltage: 8V-12V (2S lipo battery or 9V 2A DC power supply)
Output voltage: 5V
Output current: 1A

Features:
◎ The first multifunctional accurate tester to measure servo speed.
◎ Integrated with high performance gyro sensor and processor, gives a overall measuring for servo synthesis performance.
◎ Transducer Isolation design, works perfect with any kinds servos.
◎ Ultra small and portable.
◎ With BEC built in, it can work with lipo battery, you don’t need to connect it with extra receiver battery.

Especially for helicopter model players,S1 is a must choice,because it can make you really choose slope servo with same speed.

Attached Thumbnails

110.1 KB · Views: N/A

40.5 KB · Views: N/A

Help! Turnigy 5055-400 vibration

mrblucor — Fri, 20 Nov 2009 00:39:19 GMT

Hello All,
I recommended a Turnigy 5055-400 for a fellow flyer. I'm helping him last weekend with the power system and found a vibration in the motor at a certian RPM (Happens around 40% throttle). Sounds fine at low RPM's and at full throttle. It only happens in a small range around the 40% setting. This is with no prop or adaptor. I ordered new bearings from VBX.com. I installed them tonight and the vibration is still there! It's more of a noise than a vibration. I've taken the whole motor apart. I've CA'd the coil windings, balanced the rotating can, tightened all set screws, checked magnet spacing and glue, checked the 8mm shaft, tried a CC ESC and a Turnigy plush ESC. Tried different timing, re-glued magnet ring to the top support. Have I missed something? With the time I've put into this motor, I could have bought three more new ones. Now it's just a mater of pride. Any ideas?

JB

Question New to electric, would this work?

cargomaster — Fri, 20 Nov 2009 00:22:27 GMT

I was looking at doing a project (its not an airplane, just thought you guys could help) and I need two 400 motors. Would it be possible to set up 2 8-cell 9.6V 1800mAh NiMH batteries in parallel (would that give me a longer run time than just one battery?) connected to two 30A ESC's? Next question is that I have one 30A ESC and speed 400 motor and two of the batteries mentioned above from a Lanciar EP. If I got another 30A ESC and 400 motor of a different brand (have no clue what the lanciar's was, guessing Great Planes since that is its manufacture) it would work right? Also I was looking for another 30A ESC (on towerhobbies) and I found one by GWS but it says its for a 600 motor. I could still use it on the 400 couldn't I? Sorry bout all the questions. Thanks for your help!

Question Motor bent shaft and P-effect?

Zerts — Thu, 19 Nov 2009 22:46:25 GMT

If the motor has bent shaft = prop wobbles, does that greatly increase the prop P-effect?

On the affected plane, I notice a large increase in unwanted upthrust, but not counter-torque.

Discussion Unresponsive motor

appa609 — Thu, 19 Nov 2009 22:42:13 GMT

I plugged everything into my rx, servos were working, but no tone from the motor, Is there something wrong with the rx?

Yippee! MP Jet and Hyperion Gold Connectors: compatibility

Dr Kiwi — Thu, 19 Nov 2009 19:27:38 GMT

For years, all my flying components (batteries, ESCs, motors) have been connected using MP Jet Gold Connectors (1.8mm, 2.5mm). The MP Jet connectors seem to be becoming increasingly hard to come by and my usual source (www.aircraft-world.com) has gone over to a new style of Hyperion Gold Bullet Connector which (except for the external ribbing) seem to be almost identical in construction and appearance to the MP Jet ones... these Hyperion connectors come in the same 1.8mm, 2.5mm, 3.5mm sizes which were the standard for MP Jet (Hyperion come in 4.5mm too). Though these are called Bullet connectors they are not at all like the cheap 3.5mm bullets which are standard on Chinese motors etc. Like the MP Jets these Hyperions have snap rings to ensure a tight fit.

The big question???

Does one brand fit the other? ...... i.e. are they sufficiently compatible to be "mix-and-match"?

Based on the two sizes I've tried so far.....1.8mm (20A/40A), 2.5mm (40A/60A)..... (my thanks to Bob at www.allerc.com for extra 2.5mm males!, http://www.allerc.com/product_info.p...oducts_id=4492) ...... they DO fit well together. It seems that the Hyperion male 2.5mm connectors are fractionally larger than the MP Jet versions, yet they fit the MP Jet females just fine..... and the MP Jet males fit nicely into the Hyperion females. At the www.allerc.com price of $4.75 for a set of three pairs of 2.5mm, the Hyperions are a LOT cheaper than the $8.40 for the MP Jet 2.5mm set of three pairs at Hobby-Lobby.

Now the world can rest easy!

Cheers, Phil

Attached Thumbnails

3.2 KB · Views: N/A

Attached Images

Help! 18 Volt Brushed motor

Robert May — Thu, 19 Nov 2009 17:51:49 GMT

The motor in my Minicraft table saw has died a death so I a looking for a Brushed Motor

36 or 37mm diameter about 57mm long with a 3.2mm shaft.
Capable of running consitantly at 18 volts off a transformer.
1000 revs per volt.

In true mass produce style there are no makings on the motor case. Now that Minicraft are out of business I can't ask them for a spare motor.

The Graupner Speed 600 BB is the closest I can find but that is only rated to 14 volts.

Any help would be very much appreciated.

Regards

Robert

Discussion Large Motor Mounting "Stand off/Bulkhead"

yumamike — Thu, 19 Nov 2009 11:07:49 GMT

I have a question!
I have a 12 foot telemaster with a 50cc engine on it and it's over powered, but I need the HP to take up gliders in a cradle and tow up gliders with the Tow Line. I also have the Electric Motor, Batteries and ESC for the same plane and want to install the Motor in place of the 50cc engine.
The question is, should I revisit the firewall and relocate it foward and install the Motor with the bulkhead mount and the shaft end forward and attached to the propeller with a collet adapter. Or can I use the Motor Extender to attach the Motor and Extender to the existing firewall. I was told the moment of torque would be about 7 inches from the firewall and it would amplify any propeller balance problems and torque the motor out of the firewall. I have had a similar experience with a test stand Motor run-up to max RPM and destroyed the motor mount because of vibration and prop balance. The Firewall is 1/2 Ply laminated 1/4 inch and held the 50cc engine well without problems.
Any Help would be Great.
Thanks
YumaMike

Attached Thumbnails

60.5 KB · Views: N/A

58.5 KB · Views: N/A

61.4 KB · Views: N/A

Discussion Using a Mamba Max ESC in a plane??

saucisse — Thu, 19 Nov 2009 00:51:38 GMT

I have a Mamba Max ESC collecting dust since I only fly planes now. I was wondering if I can use it in a plane ??

What would be the differences if any between a car ESC vs a plane's ESC ?

Thanks.

Question JES30-3p on lipo???

bri_877 — Wed, 18 Nov 2009 23:09:54 GMT

What do you think happens if I plug 3s lipo into a Jeti rated for 6-10 nicd? 10 cell nicd would be 12v.. lipo is going to be putting out 12.5 topped off. Is this a bad idea or should it work???

Discussion Electric Plane With Rocket Launch

marrc — Wed, 18 Nov 2009 22:02:06 GMT

I came across this video. I thought you guys would enjoy it.

Jet Assisted Take Off (JATO) RC Plane (1 min 7 sec)

They launch the electric plane using 6 D size rocket motors. There was a video of them landing the plane using rocket motors, but I can't find it anymore. That was even cooler because it comes straight down nose first and a millisecond before it hits, a sensor activates the rockets which "catch" the rocket and pivot it to level. It almost looked like the plane bounced gently off the ground nose first and landed. If you guys find that video, let me know.

Discussion Is it ok for my first Electric Plane?

mandrek86 — Wed, 18 Nov 2009 21:13:08 GMT

# E-PRO 2828/28 28T BRUSHLESS OUTRUNNER MOTOR

* Battery - 7-10cell Nicad 2-3 cell Li-Poly

* Weight - 43g Recommended model weight 200-500g

* Max efficiency - 75%

* Propeller - 10x4.7 on 2 cell Li-Poly & 9x4.7 on 3 cell li-Poly

* Max eff.current - 7-12A

* Shaft diameter - 3.0mm

* RPM/V - 1048rpm/V

* Motor Size - 28x28mm. Speed Controller requirement - 12 Amp

# E-PRO SP12A-BEC-AIR BRUSHLESS S/CONTROLLER

* Current Constant - 12amp

* Current Peak - 16amp

* Weight - 22g

* BEC - Yes

* Size - 34x24x7mm

* Battery - 5-10 NiCad 2-3 Li-Poly

* Fully Programmable - Yes

* Type - Aircraft

# FLIGHTPOWER EVOLITE-0800 2S BATTERY

7.4V 18C 14.4A CONTINUOUS, 28C 22.4A BURSTS, DIMMENSIONS:12MM X 24MM X 85MM WEIGHT: 43G

# LI-POLY 1-2 CELL 500ma-1AMP CHARGER (12V)

A super compact Li-Poly field charger designed for charging 1-2 cell Li-Poly packs automatically from a 12 volt source. A detailed Li-Poly info and safety sheet is included. This describes safe handling techniques for Li-ion batteries and chargers when used in models. In use the charger is simple to operate; first, select the appropriate charge rate (500mA or 1000mA) for your pack. Once connected, an 8-bit microprocessor determines the cell count of your pack, press the start button. The charger beeps once to indicate start of charge and when finished beeps 10 times with the LED flashing to indicate charging is complete. Microprocessor controlled.

Charge rate - 500 or 1000mA

Features - Autocutoff, LED and beeper

Short circuit protection

Size - 88x35x65mm (3.5 x 1.4 x 2.5ins)

# EP1047 SLOWFLY PROP 10x4.7 (254X119)

Discussion mini p 51 mustang

rcjetflyer2 — Wed, 18 Nov 2009 19:54:52 GMT

i am making a mini electric p 51 mustang. it is almost done. i have the transmitter and receiver ready but i dont know what size motor i should use???
(the plane is about a foot long)

any suggestions for a motor size?

thanks

Discussion 1x 6cell or 2x 3cell Li-Po ?

samsone — Wed, 18 Nov 2009 18:45:44 GMT

Hello,
I prepared "engine setup" (HET 600-37-2 Typhoon + wemotech midi fan + ESC 80A) for this EDF-Jet (http://www.jetarrows.com/mirage/page...?go=spec&lg=en). I contacted the manufacturer, the "engine setup" that I prepared and delivers approximately 2.30 - 2.35 Kg thrust, He "says" is pretty satisfactory combination and in terms of weight.
Now I remains to find the best combination , what Li-po batteries will use for this " EDF setup". Ι want seeking to achieve max. flight time with good performance.
I think about for 1x 6cell 5000mAh 25C or 2x 3cell 3700mAh 25C "Li-po supply". What are the advantages or disadvantages of each combination? Do you suggest something else,better solution ?

thanks Sampson

Discussion Static Wattage of motorswrt actual.

ashtasky — Wed, 18 Nov 2009 12:19:43 GMT

hello,
can some body guide me what will be the max wot current draw while the plane is actually fliying compared to Bench test.
I know that there are many variables. I am looking for an answer, which will tell me what is a reasonable and practical estimate.
best regards
ashta
for ex on bench test wot = 11v and 15 amps
same plane while flying wot and level flight what is a reasonable approximation of these values.
thanks
ashta

Discussion Turnigy motor problems

cna91 — Wed, 18 Nov 2009 05:49:57 GMT

I have a friend that has a couple Turnigy 3530-1700's. Both of them run fine if you slowly run them up to full, but if you sharply increase throttle, they let out a blood curdling screech and stop....bring the throttle all the way down to neutral to reset and repeat....

What would cause this? Could they be overamping? Could the bearings be bad? The motors are both new. One of them doesnt even have a flight on it yet. What can be done to remedy this.

Question Does the ESC timming change the KV

R.Gareau — Wed, 18 Nov 2009 03:46:53 GMT

Does advancing the timming on my brushless motors ESC change the
rpm.

Discussion Esc beeps way to low

seair — Wed, 18 Nov 2009 00:23:11 GMT

Hi all,
Ok, so I burned out a rimfire motor(wrong prop) (model#GPMG4675). Installed a rimfire .32. 12X10 prop.
Using the same esc (phoenix 60). 3s 5000 lipo 40C. First try, and the esc beeped properly as before. However, when I first tried to run the motor, it seemed to struggle (jumpy sound, kind of how my burnt out motor started to sound toward the end of it's life) until it got going. Ran it for about 10 sec at medium power. Fine. Now today (2 weeks later) when I turned it on, I heard the esc beep slightly lower. Taxied the runway, took off and at about 10 feet, it cut out. (total time about 1 min). After landing, I gave it power and it sounded jumpy again. So I shut all down and restarted about 3 more times. The esc beeped much lower to where I have to listen hard to hear it. Because of this, I never ran the motor again. So does this sound like a bad motor I recieved or is my esc shot and I've burnt another motor? Sorry for the lengthy post.
Thanks

Discussion Hacker motor in Lanzo Bomber ?

starzak — Tue, 17 Nov 2009 23:06:47 GMT

I have come to own a Hacker A 20-26 M. Is this a good motor, and does it have enough power to fly a Lanzo Bomber scaled down to 58", weighing 20 oz, on 2 LiPo cells ?

Thank you Sirs.

zak

Discussion Turnigy 42-40B Shaft reversal

mumblety-peg — Tue, 17 Nov 2009 21:21:21 GMT

Hi All,

I need to firewall mount this motor. How do I move the shaft? Also, is there an easy way remove the c clip? I mangled it last time trying to remove it.

Thanks,
Mum

Discussion Mini Panic

Paul.GT — Tue, 17 Nov 2009 20:39:05 GMT

I going to be building a MiniPanic biplane all up weight will be 800g(1.7lbs)i want to use a 110kv motor with a 11x6 prop can anyone suggest a motor.
Thanks in advance..

Question Motor kV and windings

StealthWorkx — Tue, 17 Nov 2009 14:47:40 GMT

Hi All,
I'd like to ask a question. I've made a few of my own motors using the gobrushless stators and other parts - some i've machined up.
At the moment I'm winding 20 turns of 0.4mm wire round a 9 pole stator with 10 magnets in the outrunner. With this motor im getting around 680 kV. What I would like is a lower kV. Now of course I can put a few more winds on but there is going to be a limit to how much i can get on and 20 is about the maximum.
So my question is, how can I reduce the kV. I have 0.45 wire and 0.315 an 0.22mm wire available. I'd like to get a kV of about 500 if possible so I can get a bit more torque.

Thanks guys for any help.