SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Sep 07, 2008, 09:26 AM
I fly ghetto stuff.
Velktron's Avatar
Greece
Joined Aug 2007
926 Posts
What you actually need to build is a "voltage buffer", which will allow the 4-in-1 to transfer its output waveform (constant width & frequency, variable duty cycle pulses) to the motors, without it actually supplying any current to the motors (at most a small control current to the buffer).

A good place to start is:

http://en.wikipedia.org/wiki/Buffer_...Voltage_buffer

and

http://en.wikipedia.org/wiki/Buffer_...uffer_examples

for some elementary diagrams.

It's actually a very simple circuit to build, but the choice of transistor type and model may need a bit more searching. If you wish to use just a single type of transistor (BJT or FET) then you may start looking in the basics of
common collector or common drain single-transistor circuits. There are more complex circuits around, requiring bi-polar voltage and soldering op-amps:

http://s2.supload.com/image/High_Cur...age_Buffer.png

but the purpose of driving a DC motor with low-frequencies, single-transistor circuits will do.

Here is a guide explaining the basics and even showing how to design an amplifier given certain current and voltage specs.

http://230nsc1.phy-astr.gsu.edu/hbas...nic/npncc.html
Velktron is offline Find More Posts by Velktron
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 07, 2008, 10:25 PM
Heli Whore
Toronto, Canada
Joined Nov 2007
313 Posts
Jumping back on topic for a second, anyone heard anything new about the release date / sales of this bad boy?

-Rich
rich95 is offline Find More Posts by rich95
Reply With Quote
Old Sep 09, 2008, 11:07 AM
Registered User
Joined May 2007
200 Posts
yeah, I want to know also and how it compares to the Walkera 53-1
Racer57 is offline Find More Posts by Racer57
Reply With Quote
Old Sep 09, 2008, 11:18 AM
Registered User
malcr001's Avatar
United Kingdom, England, Gt Lon
Joined Nov 2007
2,646 Posts
Quote:
Originally Posted by eric0512
good morning,

does anybody have any information abt size and release date of the new e-sky big coax with ref ek1h-e020 as per below pic ? I heard it would be +/-sept 2008 but could not find more info abt it

http://img501.imageshack.us/img501/3730/100ng8.png

thanks
They need to start doing a double swash!
malcr001 is offline Find More Posts by malcr001
Reply With Quote
Old Sep 15, 2008, 08:25 AM
Registered User
Joined Sep 2008
146 Posts
W 53 blade

Quote:
Originally Posted by The Touch
Also the EK1H-020 has larger (By 10mm) blades than the 53#1
Try the easiest upgrade=using blade of Walkera 53 on my small coax.
The result is not exceptional as - perhaps - the blade outrun the small 180 motor (though an extreme).
Better luck with pairing big blade and 370 motor.
You know, walkera 53 blade is very interesting as it is 50% bigger than LAMA's, it should accompanied by stronger motor, longer shaft (as the original shaft is too short, the blade easily strike the body and other blade also).
It's just my amateur observation thou.
ishady is offline Find More Posts by ishady
Reply With Quote
Old Dec 03, 2008, 02:50 PM
Registered User
Czech, Prague
Joined Aug 2008
77 Posts
So it is coming out late september right?
Did they mean 2009?
Maxs is offline Find More Posts by Maxs
Reply With Quote
Old Dec 03, 2008, 03:14 PM
Buy, Mod, Fly, Sell, Repeat
JHawk19's Avatar
United States, SC
Joined Apr 2008
1,973 Posts
I've emailed E-Sky with no response yet.

The Hunter is available now though. It's very similar.

Hunter
Main rotor diameter: 340mm (13 inches)
Length: 415mm (16 inches)
Height: 174mm
Width: 77mm
Weight: about 216g
Power system:180 motor x 2

EK1H-E020
Main rotor diameter: 460mm (18 inches)
Length: 510mm (20 inches)
Height: 260mm
Width: 110mm
Weight: about 410g
Power system: 370 motor x 2
JHawk19 is offline Find More Posts by JHawk19
Reply With Quote
Old Dec 03, 2008, 03:41 PM
Resident Skeptican
Barak1001's Avatar
USA, AL, Hanceville
Joined May 2008
4,323 Posts
The "Hunter" is the same thing as a Lama V3/V4 with a scale fuselage.
Barak1001 is offline Find More Posts by Barak1001
Reply With Quote
Old Dec 03, 2008, 05:57 PM
I fly ghetto stuff.
Velktron's Avatar
Greece
Joined Aug 2007
926 Posts
Quote:
Originally Posted by JHawk19
I've emailed E-Sky with no response yet.

The Hunter is available now though. It's very similar.
No, it's not.
Velktron is offline Find More Posts by Velktron
Reply With Quote
Old Dec 04, 2008, 06:55 PM
Buy, Mod, Fly, Sell, Repeat
JHawk19's Avatar
United States, SC
Joined Apr 2008
1,973 Posts
Sorry Velktron....

Anyways, you can buy this heli now at xheli.com for $150.

http://www.xheli.com/esbicolarche.html
JHawk19 is offline Find More Posts by JHawk19
Reply With Quote
Old Dec 04, 2008, 10:36 PM
Registered User
Perth
Joined Jun 2007
163 Posts
I wonder if they really have it in stock, as everyone else still has it on preorder.
The Touch is offline Find More Posts by The Touch
Reply With Quote
Old Dec 05, 2008, 05:29 AM
One Thirty Second
oldtamiyaphile's Avatar
Western Australia
Joined Feb 2004
133 Posts
Quote:
Originally Posted by Hokum Jim
My LHS charges $AU 249 for a 36MHz Lama V4... Fair enough in some ways because 36MHz is such a tiny part of the worldwide RC market...

This sounds like a lot but I just sold off my spare V3 airframe and 35MHz Radio gear on eBay and the postage was over $20 to send it to another Queenslander! WA would have cost nearly $50!
FYI, there's no such thing as a 36mhz version. All they do is swap the Xtals and labels. If you remove the case of a 36mhz RX you'll see the 35mhz box ticked! I have a 35Mhz V4 and fly it on 36 with no dramas.

Hirobo does the same, so I think they all do.
oldtamiyaphile is offline Find More Posts by oldtamiyaphile
Reply With Quote
Old Dec 05, 2008, 06:11 AM
Buy, Mod, Fly, Sell, Repeat
JHawk19's Avatar
United States, SC
Joined Apr 2008
1,973 Posts
Quote:
Originally Posted by The Touch
I wonder if they really have it in stock, as everyone else still has it on preorder.
I received an email from E-Sky directly letting me know that xHeli.com has them in stock for sale.
JHawk19 is offline Find More Posts by JHawk19
Reply With Quote
Old Dec 05, 2008, 06:36 AM
Registered User
Perth
Joined Jun 2007
163 Posts
Quote:
Originally Posted by JHawk19
I received an email from E-Sky directly letting me know that xHeli.com has them in stock for sale.
Thanks mate
The Touch is offline Find More Posts by The Touch
Reply With Quote
Old Dec 05, 2008, 09:22 AM
Registered User
Joined Sep 2007
408 Posts
They probably do have it in stock, but i couldn`t find any parts listed for it. You probably wont need much in the way of parts at first except blades, but i imagine the Walkera 53-1 blades will fit it. I hope the Esky blades are better quality than the 53-1 blades are, and cheaper, the 53-1 blades are 10-13$ a set unless you buy off Ebay or some of the asian sites. And the aftermarket blades i`ve tried on mine werent as good quality as stock, which were bad enough. LOL
daddyztoyz is offline Find More Posts by daddyztoyz
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
New E-Sky Model #EK1H-E010 flightdeck-guy Micro Helis 1 Sep 10, 2005 09:51 AM
Yippee! New E-Sky 2 Sparky_500 Micro Helis 2 Jun 12, 2005 02:23 PM
Brand new E-SKY 3D $185 shipped RCdude1 Aircraft - Electric - Helis (FS/W) 0 Mar 25, 2005 03:56 PM
Brand new E-SKY 3D $215 shipped RCdude1 Aircraft - Electric - Helis (FS/W) 1 Mar 23, 2005 09:48 AM
Fs: New E Sky Honey Bee 2 Ccmp sambo32 Aircraft - Electric - Helis (FS/W) 1 Jan 01, 2005 02:43 PM