HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Nov 16, 2012, 07:50 AM
Registered User
United States, TX, San Antonio
Joined Sep 2008
167 Posts
Question
Art Hobby PJS 1400ART motor

I have been told PJS is no longer with us....I am looking for a motor that will duplicate the performance of theis PJS 1400 which is no longer available.. Anyone have any input ?
Kenbogunz is offline Find More Posts by Kenbogunz
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 16, 2012, 10:02 AM
Jack
USA, ME, Ellsworth
Joined May 2008
16,690 Posts
Some info on planes that used that motor here:

Art Hobby Castor-EV 2.5M Build - http://www.rcgroups.com/forums/showthread.php?t=862800

ArtHobby Evolution-E - http://www.rcgroups.com/forums/showthread.php?t=781527

One of those mention a 12 x 6 prop, another mentions a 32mm or so motor, all you really need to do is find some info on the prop they used and you can work that backwards to a good motor to make it go around with.

Added note:

Here is a PJS 1200 motor, the 1400 is probably the same motor with a different Kv rating:

http://www.arthobby.com/index.php?pa...ry=65&item=182

Motor KV (RPM/V) - 950
Current (A) - 17 - 21
Battery (LiPo) - 3 cells (1200-1600mAh)
Propeller Range - 11.5x6, 12.5x6 CAM carbon
Static Thrust ~1200 g / 42 oz.
Weight - 68 g / 2.38 oz.
Motor Diameter - 28 mm / 1.10 in.
Motor Length - 35 mm / 1.38 in.
Shaft Length - 22 mm /0.86 in.
Shaft Diameter - 4 mm

Looks like almost any 68 gram or so motor with a Kv around 900-1000 would be a good start for you. The 28mm may be key to fitting the motor into the fuselage.

Jack
jackerbes is offline Find More Posts by jackerbes
Last edited by jackerbes; Nov 16, 2012 at 10:11 AM.
Reply With Quote
Old Nov 16, 2012, 11:32 AM
Registered User
United States, TX, San Antonio
Joined Sep 2008
167 Posts
Jack.....I dont think its the same motor / diff KV......I guess i will have to pull it out of a plane I bought from a guy ....I am hoping someone may have one of the 1400s to sell, or can tell me more about it. the motors AH is selling now are not PJS
Kenbogunz is offline Find More Posts by Kenbogunz
Reply With Quote
Old Nov 16, 2012, 11:44 AM
Jack
USA, ME, Ellsworth
Joined May 2008
16,690 Posts
It looks like maybe the 1400 in the model name is the thrust. The 1200 has 1200 grams of thrust it says. That is a stupid way to name motors though as it is the battery voltage/Kv/RPM and prop that decides the thrust.

Is a 11.5 x 6 to 12 x 6 folder the prop you want to use? If so, that 960 Kv motor will most likely work fine. If you want a little more motor the next size up from the 28mm O.D. motor would be about 35 mm O.D. Will that fit in your fuselage? If not you need something like a 2836 or 2840 type motor.

Don't worry about getting an exact match, they hardly ever get it right to begin with. You are smarter than them in the end...

Jack
jackerbes is offline Find More Posts by jackerbes
Reply With Quote
Old Nov 16, 2012, 12:04 PM
Registered User
United States, TX, San Antonio
Joined Sep 2008
167 Posts
Jack..Im not sure what my next project will be...all I know is that 1400 (supposedly) takes my Castor up like a rocket.....using one of AH carbon props that they dont even show on their websight...I am pretty sure its a 12.5 x 6.....just wanted to try and find another1400 .....I just peeked inside this plane and the 1400 is a 35MM motor........
Kenbogunz is offline Find More Posts by Kenbogunz
Last edited by Kenbogunz; Nov 16, 2012 at 12:12 PM.
Reply With Quote
Old Nov 16, 2012, 02:08 PM
Jack
USA, ME, Ellsworth
Joined May 2008
16,690 Posts
Quote:
Originally Posted by Kenbogunz View Post
Jack..Im not sure what my next project will be...all I know is that 1400 (supposedly) takes my Castor up like a rocket.....using one of AH carbon props that they dont even show on their websight...I am pretty sure its a 12.5 x 6.....just wanted to try and find another1400 .....I just peeked inside this plane and the 1400 is a 35MM motor........
OK, then maybe they are sizing them by thrust then. If these are average quality motors they can handle about 3 Watts of input power for each gram of motor weight. Estimating the power by the motor weight will give you more accurate and consistent numbers for comparing motors. And gets you away from problems with sellers who obfuscate the specs or lie about their goods. Just look at that 68 gram 1200 motor as being a 204W motor (3 x 68 = 204W).

Your 35mm motor will be heavier and therefore more powerful too. And if I go here I can look at the details on the Castor EV-2.5M:

http://www.arthobby.com/index.php?pa...ry=50&item=250

That lists a 35mm motor called the ART-2000 for the Castor. The details on the ART-2000 show it as a 35mm x 39mm, 650 Kv motor that weighs 157 grams. And the 3 Watts per gram rule makes it about a 471W motor. The ART-2000 motor details are here:

http://www.arthobby.com/index.php?pa...b_category=65#

So maybe you have a ART-2000? Or maybe the 1400 motor is a 35mm motor that is a little more motor than the 1200 and less than the ART-2000?

Since the ART-2000 is listed as 35mm x 49mm long, the 1400 might be something like a 3536 or so motor. If you're sure you have a 1400, measuring the length of the body will get you in the ballpark on finding something similar.

As an example, here is a 96 gram motor that measures 35mm x 36mm. It has a 970 Kv, weighs 96 grams, and that can be thought of as a 288W motor:

http://www.headsuprc.com/servlet/the...ushless/Detail

AH looks like they specialize in better quality gliders and they carry some of the better quality European accessories. Looking at their motors I would guess that they are a "house branded" Chinese motor and of average quality or maybe a little better than average if AH is a demanding buyer and applying some quality control to the process.

I play with motor gliders a little but nothing of the size and quality of the EV line. So I have gotten involved in the details of glider power systems and accessories. There is a world of difference in the quality and performance of accessories between the European made stuff and the copies from China. For the most part I buy the better stuff when I buy props, hubs, yokes, and that kind of stuff.

Is this your prop here?

http://www.arthobby.com/index.php?pa...ry=55&item=207

That is a lovely thing for sure. I don't have one of those yet...

But I certainly do appreciate the quality and performance of Graupner and Aeronaut folders over the cheap junk.

Jack
jackerbes is offline Find More Posts by jackerbes
Reply With Quote
Old Nov 16, 2012, 05:09 PM
Registered User
United States, TX, San Antonio
Joined Sep 2008
167 Posts
yep...that looks like it.....I couldnt find it on their sight....Ill look agian...thanks very much for taking the time...ps thier motors are now from china...Im pretty srue.....Adrain (owns AH) told me the they couldnt get PJS any longer.....Jck I couldnt stand it...took it out......32MM diam x 35MM long ...aprox 105 grams with an adapter
Kenbogunz is offline Find More Posts by Kenbogunz
Last edited by Kenbogunz; Nov 16, 2012 at 05:40 PM.
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Art-Tech 950kv BL Motor With Art-Tech 30A BL ESC REDUCED nitrodude71 Aircraft - Electric - Power Systems (FS/W) 3 Aug 15, 2012 09:04 AM
For Sale Art Hobby 2M Boar, ready to fly, $180 John Kim Aircraft - Sailplanes (FS/W) 1 Apr 16, 2012 11:05 PM
Sold Art Hobby Thermic RES 2.5 Hoody Pants Aircraft - Sailplanes (FS/W) 6 Feb 29, 2012 12:09 AM
Help! Need a new Wing for my 2m Art-Hobby Sky-E Avetikus Electric Sailplanes 1 Feb 22, 2012 07:05 PM
Need motor recommendation for Art Hobby Kastor 1.65M ferradas Electric Sailplanes 2 Mar 21, 2002 01:48 PM