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Old 11-15-2010, 08:43 PM   #16
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To get the proper direction, drill out the top shaft hole on the other half of the gearbox, turn to top shaft around and mount the motor plate to the other side. No need for special forth gear. I did this many years ago for a gearbox on road class.
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Old 11-15-2010, 08:50 PM   #17
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Quote:
Originally Posted by trx-1racer View Post
Actually reversing the motor will make the vehicle travel the correct direction, but inertia will be going the wrong way for proper weight transfer under acceleration.

Thats why all of the mid motor conversion kits have 4 gear transmissions...

I'm not saying it wont work, just not as well. I'm not trying to put your work down, just letting you know what else might be needed.

Below is a pic of my LMX losi mid motor conversion and you can see the external counter gear to get the motor spinning the right way. The X-Factory kits and Schumacher Cougar SV use the 4th gear inside the transmission.



The picture above is a true example of over thinking a mid motor
R/C car...

I designed the first mid motor RC10 right after they first came out from
AE and there is no need for an idler gear at all, it is a total waste of
time and extra moving parts.

All you have to do is flip the trany around forward. Then you drill out the
top shaft hole on the trany case so you can put the top shaft out the
oppisite side of the trany case. On the old hole side you cover it with a
piece of servo tape to keep dirt out of the trany & bearing. Then you put
the motor plate on the same side as the top shaft is coming out. Now
your motor is on the same side as it was before turning the same
rotation as it was before no biggie at all. This works flawlessly no fuss
no muss. The only thing you need to do is a little work to modify the
gear cover to get it to seal again like it did when it was a rear motor
plate.

This conversion became so popular at one time after I started selling it
for RC10's back in the early 80's that Mr. Moore made and sold trany
cases with the hole for the top shaft on the other side on his MIP
RC10/Tamiya trany kits so you did not have to plug the hole with servo
tape.

This still to this day amazes me how many people over think something
that is so basic & simple. I guess it is human nature to over think the
simple things in life..
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Old 11-15-2010, 08:52 PM   #18
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Quote:
Originally Posted by bob o View Post
To get the proper direction, drill out the top shaft hole on the other half of the gearbox, turn to top shaft around and mount the motor plate to the other side. No need for special forth gear. I did this many years ago for a gearbox on road class.
Bob Oaks

Bingo" Bingo" Mr. Oaks wins the prize for not over thinking a very
simple project"

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Old 11-15-2010, 08:59 PM   #19
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Quote:
Originally Posted by RustyRC View Post
I did all the work to make AE SC10 Mid motor conversion.

BTW: Nice work Rusty, just put you motor plate on the other side
of the trany,turn the top shaft around to come out the other side and
your in business my friend"
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Old 11-16-2010, 12:10 AM   #20
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Tight mod bro! Don't over think it, it's been done! Let us know if you go out there and dominate.
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Old 11-16-2010, 07:28 AM   #21
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Did anyone notice the rear toe is backwards? Did you correct it by flipping the hubs?

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Old 11-16-2010, 08:03 AM   #22
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Nice work. There was a big differance between the old XFactory 3 gear tranny and the 4 gear. The 4 gear handles better. Looks good!
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Old 11-16-2010, 08:11 AM   #23
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Quote:
Originally Posted by bob o View Post
To get the proper direction, drill out the top shaft hole on the other half of the gearbox, turn to top shaft around and mount the motor plate to the other side. No need for special forth gear. I did this many years ago for a gearbox on road class.
Bob Oaks
I did the work today, see what I did.
Attached Thumbnails
Here is AE SC10  Mid Motor Conversion pic-mid-motor-3-002.jpg  
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Last edited by RustyRC; 12-01-2010 at 06:10 AM.
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Old 11-16-2010, 08:26 AM   #24
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Quote:
Originally Posted by Chuck 21 View Post
The picture above is a true example of over thinking a mid motor
R/C car...

I designed the first mid motor RC10 right after they first came out from
AE and there is no need for an idler gear at all, it is a total waste of
time and extra moving parts.

All you have to do is flip the trany around forward. Then you drill out the
top shaft hole on the trany case so you can put the top shaft out the
oppisite side of the trany case. On the old hole side you cover it with a
piece of servo tape to keep dirt out of the trany & bearing. Then you put
the motor plate on the same side as the top shaft is coming out. Now
your motor is on the same side as it was before turning the same
rotation as it was before no biggie at all. This works flawlessly no fuss
no muss. The only thing you need to do is a little work to modify the
gear cover to get it to seal again like it did when it was a rear motor
plate.

This conversion became so popular at one time after I started selling it
for RC10's back in the early 80's that Mr. Moore made and sold trany
cases with the hole for the top shaft on the other side on his MIP
RC10/Tamiya trany kits so you did not have to plug the hole with servo
tape.

This still to this day amazes me how many people over think something
that is so basic & simple. I guess it is human nature to over think the
simple things in life..
Thanks, I will take the over thinking as a complement as I am sure Paul and Chazz at the Xcamp will..

The difference between the current mid-motor offerings and those from the past is now we understand how to use things like the torque roll of the motor as a benefit instead of a hinderance. Ask anyone that has driven both a 3 gear MM car and a 4 gear MM car and they will tell you that the difference is night and day.Especially under accelleration.A 4 gear set-up is the ideal way to go if you plan on running dirt. For carpet you wont see the difference between the 2 as much,hence the old school conversions were generally used on carpet or oval.They were great in those circumstances just due to the mass of the car being more centrally located, which resulted in faster corner speeds. In an offroad setting they were hard to get the rear end to not be sketchy coming out of low speed corners under accelleration due to the motors torque roll wanting to fight weight transfer to the rear end.The 4 gear trannsmission was the key to helping with that issue, just as now we are trying to center the rotating mass of the motor to help apply that weight trannsfer in an equal manner instead of being offset in relation to the centerline of the chassis.It's another step forward.There is no need to re-visit that technology that was used by MIP,Tekin, and a few others as the achiles heel of that design has been found and corrected thanks to the guys at the X-camp.
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Old 11-16-2010, 08:33 AM   #25
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To the O.P-- nice DIY conversion though!!
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Old 11-16-2010, 09:33 AM   #26
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Default Mid motor switched

I finished the work to move the motor plate on the other side.
Attached Thumbnails
Here is AE SC10  Mid Motor Conversion pic-mid-motor-4.jpg  
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Old 11-16-2010, 09:47 AM   #27
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Quote:
Originally Posted by D-Rek07 View Post
What is the benefit of having a mid-motor car?
It gives the care better weight distribution. From the factory, most of the weight is at the rear and not much at all on the front. This just moves the weight center closer to the middle of the truck.
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Old 11-16-2010, 12:54 PM   #28
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Quote:
Originally Posted by D-Rek07 View Post
What is the benefit of having a mid-motor car?

Here is a link that explains fully why a mid motor design far better the a
rear motor design....

http://en.wikipedia.org/wiki/Automobile_handling

Enjoy"
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Old 11-16-2010, 12:57 PM   #29
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Quote:
Originally Posted by RustyRC View Post
I finished the work to move the motor plate on the other side.
Nice job, now find a way to locate the battery sideways in front of the
motor and your dialed"

Read this link and you'll understand why I'm telling you this...

http://en.wikipedia.org/wiki/Automobile_handling


Enjoy your truck"
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Old 11-17-2010, 07:27 AM   #30
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Rusty,

Did ya get to read the link?? & move the battery??
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