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Old Jul 17, 2012, 07:32 AM
Texas Buzzard
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McAllen,Texas
Joined Mar 2004
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Easy Star II Firewall ??

I just received an Easy Star II kit ( no motor).

Does Mutiplex expect us to use a motor retained to the firewall by securing motor with machine screws that go through the firewall from the front into the threads on motor's front end?

I can manufacture a plywood firewall as I usually do and use the "X" motor mount as most of us do - but why did Multiplex do that - I think they want your money for their motor. Am I overlooking something?
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Old Jul 17, 2012, 07:52 AM
When pigs fly rc
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USA, NY, Chester
Joined Apr 2008
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I had mine with only rudder for steering and it flew great ! I added ailerons with a mix of rudder and it flys like a dream.
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Old Jul 17, 2012, 07:52 AM
So I'M meant to be in control?
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Ilkley, West Yorkshire, UK
Joined Nov 2008
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Quote:
Originally Posted by Texas Buzzard View Post
Does Mutiplex expect us to use a motor retained to the firewall by securing motor with machine screws that go through the firewall from the front into the threads on motor's front end?

I can manufacture a plywood firewall as I usually do and use the "X" motor mount as most of us do - but why did Multiplex do that - I think they want your money for their motor. Am I overlooking something?
My screws went into through the plastic from the rear of the model, forward into the motor....

But yes, mine fitted fine.
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Old Jul 17, 2012, 08:11 AM
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53859 Niederkassel, Germany
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Quote:
Originally Posted by Texas Buzzard View Post
...
Does Mutiplex expect us to use a motor retained to the firewall by securing motor with machine screws that go through the firewall from the front into the threads on motor's front end?
...
That's how most motors (brushed or brushless) are mounted. Nothing unusual here.

Jürgen
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Old Jul 17, 2012, 08:35 AM
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Denmark, Capital Region of Denmark, Charlottenlund
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Quote:
Originally Posted by Texas Buzzard View Post
I just received an Easy Star II kit ( no motor).

Does Mutiplex expect us to use a motor retained to the firewall by securing motor with machine screws that go through the firewall from the front into the threads on motor's front end?

I can manufacture a plywood firewall as I usually do and use the "X" motor mount as most of us do - but why did Multiplex do that - I think they want your money for their motor. Am I overlooking something?
A standard $11, 2830mm outrunner motor like this fits directly into the pod:


3mm screws for it are even supplied in your kit :-)
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Old Jul 18, 2012, 07:36 AM
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Canton, Michigan USA
Joined Jul 2007
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Quote:
Originally Posted by Jurgen Heilig View Post
And even when you think you got everything right ... :

http://www.youtube.com/watch?v=TYOzRyf3ENY

This is hopefully my only "off-topic" reply - please try to stay on-topic.

There is a reason why beginner models are usually not made from wood anymore.

Jürgen
Wow. I bet Kevin will stop hovering in the flight pattern.
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Old Jul 18, 2012, 10:50 AM
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Back or front of "Firewall"

Quote:
Originally Posted by Jurgen Heilig View Post
That's how most motors (brushed or brushless) are mounted. Nothing unusual here.

Jürgen
Juergen (Sorry for fake umlaut)

Depends if you grew up with brushed Graupners ( in back of firewall) or fuel i.c. motors, what you think is normal.

There is a reason to put the motor in front of that mount in the EZ II, though. You need less nose weight. A two ounce motor with its CG an extra inch back of the plane CG needs 1/3 ounce ballast or extra battery weight 6 inches forward of plane CG.

I've put a back plate mounted motor (KMS 31/21 from Hobby People) on a similar sized Push E Cat, but needed to design my motor mount so it's closer to the back of the pylon. That's shown in the picture, with an APC 7X5 E prop mounted.

I have a similar motor mounted on the front of an MSComposit Citabria, in front of the "firewall", so not all European models have it in back. My Blu-Baby 42 high winger scratch built has a HiMax 2816-0890 out front as well.

So you've got choices with the EZ II. A) Find a motor with the shaft going through the fixed end, 0r B) change the mount and add nose weight, or C) slice off the pod and glue in a firewall mount.

Guten Tag

Joe
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Last edited by DuPageJoe; Jul 18, 2012 at 04:21 PM. Reason: clarity
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Old Jul 18, 2012, 03:52 PM
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Quote:
Originally Posted by DuPageJoe View Post
...So you've got choices with the EZ II. Find a motor with the shaft going through the fixed end, change the mount and add nose weight, or slice off the pod and glue in a firewall mount....
I may be a bit slow on the uptake, but I really don't get it. I mounted an $11 "motor with the shaft going through the fixed end" as per instructions. I have had no problems whatsoever getting the CoG right.

No offence meant Joe, but why anybody would "slice off the pod" on a new (and very well designed) ES ll is simply beyond me...
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Old Jul 18, 2012, 04:09 PM
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Sorry Mike

Glad you took choice A and it worked for you. The CG would have shifted only if you took choice B and put the motor back of the pod. Choice C was only for die hards who wouldn't take A or B.

I was speaking to answer Texas Buzzard's question as to why Multiplex designed the mount so the motor would be in front of it. The previous answer that we always do it this way did not seem complete.

Joe
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Old Jul 18, 2012, 05:08 PM
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Mike

For an example of what I meant in choice B, see Tom Eutsler's post

http://www.rcgroups.com/forums/showp...&postcount=779
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Old Jul 18, 2012, 11:34 PM
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Quote:
Originally Posted by DuPageJoe View Post
Juergen (Sorry for fake umlaut)

Depends if you grew up with brushed Graupners ( in back of firewall) or fuel i.c. motors, what you think is normal.
...
That's why I used the word "most".

Millions of Mabuchi and similar motors have been mounted like that.

Jürgen
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Old Jul 19, 2012, 08:20 AM
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Quote:
Originally Posted by Jurgen Heilig View Post
That's why I used the word "most".

Millions of Mabuchi and similar motors have been mounted like that.

Jürgen
This is still not a persuasive argument to the large number of U.S. based flyers who are trying to understand the conversion from i.c. planes to electric. Why is O.S. coming out with a line of e-motors that are rear mounted and drop in for i.c. motors? To address the above market, of course.

That's why I tried explain the Multiplex mount choice more technically.

If Multiplex wants more planes in the U.S. market, they'll need to come up with better answers to the concerns of Texas Buzzard and others like him. They have never flown Mabuchi powered airplanes. I have a 1 meter motor glider with one that I use for crashing practice. They can be picked up cheap at swap meets over here.

Joe
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Old Jul 19, 2012, 10:30 AM
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Originally Posted by DuPageJoe View Post
This is still not a persuasive argument to the large number of U.S. based flyers who are trying to understand the conversion from i.c. planes to electric. ...
Well, if a modeler has problems mounting an electric motor in a plane, i.e. in this case following an illustrated instruction manual and using two machine screws, he (or she ) may have chosen the wrong hobby.

Jürgen
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Old Jul 19, 2012, 10:35 AM
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Quote:
Originally Posted by jurgen heilig View Post
well, if a modeler has problems mounting an electric motor in a plane, i.e. In this case following an illustrated instruction manual and using two machine screws, he (or she ) may have chosen the wrong hobby.

jürgen
bazzinga!
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Old Jul 19, 2012, 10:51 AM
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Denmark, Capital Region of Denmark, Charlottenlund
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Single-servo, two-axis camera set-up

OK, 'nuff said about mounting motors, so here's something a little different: A single-servo two-axis (pan & tilt) camera set-up with rubber bands, push rods, hinges, curved wires, and funny foam cuts :



I've posted a more detailed description and a video in the FPV forum.
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