Landing Gear NT700

ted007 · Sep 21, 2019

Sorry if this has already been covered, but I searched & did not find anything much.

I was wondering if anyone out there has a landing gear set up on an NT700.
A search on the web turned up some for Goldwings, NC700-750, BMW, HD & some others.
None of which will work on the NT.

I'm about to build a prototype & would love to get some input.
Automatic lowering & raising is out of the picture for now, as I'm a mechanical designer &
the automatic requires electronics linked to speed.
If any electronics types out there want to participate in the second generation , please feel free
to contact me.

Also if anybody can tell me how to post an mp4 file, it would be greatly appreciated

Phil Tarman · Sep 21, 2019

Ted, as an old fat cripple I'll be watching your progress with interest.

As to inserting an mp4 file, your best bet might be to insert a link to that file. The link button is in the row above the typing area next to the text formatting buttons (or you can use Ctrl + K). You might also try the insert image button (or Cntrl + P).

ted007 · Sep 22, 2019

Phil Tarman said:
Ted, as an old fat cripple I'll be watching your progress with interest.

As to inserting an mp4 file, your best bet might be to insert a link to that file. The link button is in the row above the typing area next to the text formatting buttons (or you can use Ctrl + K). You might also try the insert image button (or Cntrl + P).

Phil

Thanks for the interest. Parts are on order, hoping shipping is quick.
Check the top left corner of this entry, there is a small picture of the concept showing up & down positions.
If there is a way to send me your personal email , I can send you the mp4 file.

Ted007

mikesim · Sep 22, 2019

An interesting idea! I'm looking forward to seeing how your project progresses. I'm assuming hydraulic actuation vs pneumatic?

Mike

ted007 · Sep 22, 2019

mikesim said:
An interesting idea! I'm looking forward to seeing how your project progresses. I'm assuming hydraulic actuation vs pneumatic?

Mike

Mike

Air & hydraulic both have the disadvantage of leaking, & are expensive relatively, requiring a compressor or pump.
I have chosen a linear actuator which is self locking when the power is off, & doesn't leak ( I hope)

Ted

mikesim · Sep 22, 2019

ted007 said:
Mike

Air & hydraulic both have the disadvantage of leaking, & are expensive relatively, requiring a compressor or pump.
I have chosen a linear actuator which is self locking when the power is off, & doesn't leak ( I hope)

Ted

Good choice! I hadn't considered the LA.

Mike

Phil Tarman · Sep 22, 2019

Ted, my email address is ptarman (one -- insert the numeral without the parentheses) at msn -dot-com.

Coragyps · Sep 23, 2019

As far as the automatic part goes, if you can find someone who is versed in designing with Arduino, it shouldn't be too difficult to cobble together a system that will read the speed directly off the speedometer wiring (I believe the speedometer accepts electric pulses rather than the old style spinning cable) and output a signal to a relay that would actuate/deactuate your linear actuators.

Brillot2000 · Sep 26, 2019

ted007 said:
Mike

Air & hydraulic both have the disadvantage of leaking, & are expensive relatively, requiring a compressor or pump.
I have chosen a linear actuator which is self locking when the power is off, & doesn't leak ( I hope)

Ted

Those can be costly. I am just saying.

Are you planning on stepper or servo motors? The pricing is significantly different between them.

ted007 · Sep 27, 2019

Brillot2000 said:
Those can be costly. I am just saying.

Are you planning on stepper or servo motors? The pricing is significantly different between them.

I don't really know the difference, but which ever is the lower cost.
I'm guessing servo , as they have internal limit switches to shut off at end of travel.

Brillot2000 · Sep 27, 2019

ted007 said:
I don't really know the difference, but which ever is the lower cost.
I'm guessing servo , as they have internal limit switches to shut off at end of travel.

Servos are the most costly of the two. Variable frequency drives, full encoder feedback, and what else not.

I found this website, Electric Linear Actuators. The pricing is as little as $69 USD and up.

Good luck with this project. Be sure to provide up with some updates on your progress.

ted007 · Oct 9, 2019

ACTUATORS arrived.
One cycles at reasonable speed, one cycled out only. So now the setback of return & replace, and/or changing supplier & consequently mounting . Will mean redesigning & remaking some components. The old saying still holds true:
" You can have it fast.
You can have it good.
You can have it cheap.
PICK TWO."

Frosty · Oct 9, 2019

While at a rally, I saw a guy jump on his large BMW K LT bike and deploy the electric center stand. I was amazed. I understood why, just not how.

ted007 · Oct 10, 2019

Frosty said:
While at a rally, I saw a guy jump on his large BMW K LT bike and deploy the electric center stand. I was amazed. I understood why, just not how.

From what I've seen I surmise BMW uses a gear reduced 12v motor to drive the stand

ted007 · Oct 10, 2019

Once more I'd be wrong . It's hydraulic https://www.bmwlt.com/forums/k1200lt/175097-retro-fitting-electric-center-stand.html

But only partly, as the motor drives the pump which drives the fluid which drives the cylinder which drives the stand

Frosty · Oct 11, 2019

The impressive part is that he was just back from the showers and was wearing flip flops!

ted007 · Oct 25, 2019

Frosty said:
The impressive part is that he was just back from the showers and was wearing flip flops!

UPDATE

Proof of concept is assembled ( minus the wheels ) & on the bike.
Test wiring powered by an old 5A battery charger.
Built, machined & welded all myself except for the aluminum mounts for the actuators.

The welds are ugly, but strong enough for testing when the wheels arrive.
There is a short video of the operation but I can't find how to upload it.
Seems the site won't take ".mov" files,
But I will email it to those who request it

Brillot2000 · Oct 25, 2019

Hmmm... Looks like there could be some cornering interference issues due to the width of the apparatus. I can get my bike way over in a turn. I'm just saying.

Otherwise, it looks good from this angle.

Why don't you upload your video up to YouTube and post a link in your update?

ted007 · Oct 25, 2019

Brillot2000 said:
Hmmm... Looks like there could be some cornering interference issues due to the width of the apparatus. I can get my bike way over in a turn. I'm just saying.

Otherwise, it looks good from this angle.

Why don't you upload your video up to YouTube and post a link in your update?

Bruce
Yes there is reduced cornering clearance, I don't carve corners any more, especially with someone in the "Queen seat ". But do need the help sometimes at a stop in certain conditions,
which is why I designed & built this.
The thing is not finalized & the "vertical" tubes will be cut shorter at the bottom, when I determine the right position. ( I won't do that without the wheels installed )
Theoretical corner lean comes out to ~39 deg. , at 45 most people crash..

BTW, when final , the thing will be removable in about 5 min. ; so you can ride her to "The Dragon " , remove it & ride the dragon without her, put it back & ride home.

Thanks for the u-tube suggestion but I don't want to go "viral " yet

Ted

Frosty · Oct 25, 2019

Well Done! The first important steps are learning what does not work.