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Motorizing the 1750 Options · View
modelmaniac
Posted: Monday, October 19, 2020 4:20:04 PM

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Joined: 10/4/2005
Posts: 808
Location: england
Oh my days.Applause That would be so good,in my LR 1750.I would love,to be able to do that.
Ironstef70
Posted: Monday, October 19, 2020 10:59:34 PM

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Joined: 6/27/2013
Posts: 880
Location: Quebec, Canada,
Guys, if you think that this project is impressive, that's just like a cat being compared to a Siberian tiger.

This Frenchman almost made me fall from my chair this weekend.
He's taken more than 15 years scratchbuilding a LR1400 in brass, in 1:16 scale. We got in touch through YouTube, as he cannot post here.
He also does crane conversions, and completed a couple using custom made components in brass.
Way more professional than my current mod. He seems to custom build each of his parts.

You've gotta take a look at this:

The LR1400

A couple RC crane conversions

In operation:

Phil's YouTube channel

Applause Applause Applause




___________________________________________________
Playing with toys since 1970, now building them.
Ironstef70
Posted: Monday, October 19, 2020 11:10:21 PM

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Joined: 6/27/2013
Posts: 880
Location: Quebec, Canada,
JohnGalt wrote:
In the "hide the wires" picture I love how the dude is just sitting in the detached cab. Probably playing with the controls, making motor sounds with his mouth.


LOL!! Soon he will be surrounded with hair sized wires as a couple LEDs will be above and next to the cab...

___________________________________________________
Playing with toys since 1970, now building them.
JohnGalt
Posted: Tuesday, October 20, 2020 7:41:50 PM

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Joined: 6/27/2007
Posts: 1,461
Location: St. Louis, Missouri, USA
Ironstef70 wrote:

You've gotta take a look at this:

The LR1400

A couple RC crane conversions

In operation:

Phil's YouTube channel

Applause Applause Applause


That is some serious talent. It blows my mind to think about what humans can do. From a biological perspective, all we really need to do is be able to find food and shelter, and defend ourselves from enemies. Yet, we have been given skills and abilities far beyond what is necessary for those tasks. Thanks for sharing your work, as well as Phil's. There have been some remarkable creations on this forum over the years.
Ironstef70
Posted: Saturday, October 24, 2020 10:20:15 PM

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Joined: 6/27/2013
Posts: 880
Location: Quebec, Canada,
Finally completed all boom sheaves with V grooved bearings at critical friction points. Other sheaves are YCC (13mm and another diameter) brass, and original rods have been replaced by custom stainless ones.

V bearing sheave by Ironstef70, sur Flickr"/>

I have recently received the CNC machined parts for the cable drums. Precision machining on these is critical since proper alignment is mandatory for smooth motors operation.

Each drum motor is identified according to its position on the crane. Some have different RPM depending of their location. I always do extra parts in case of errors, but those were all successfully made, so I will have three extra drum/motors for the garage (yay!) Smile

Nice CNC machined parts by Ironstef70, sur Flickr"/>

Drilling template by Ironstef70, sur Flickr"/>

Drum frames by Ironstef70, sur Flickr"/>

Stef

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Playing with toys since 1970, now building them.
OAF
Posted: Sunday, November 01, 2020 12:42:07 PM
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Posts: 91
Hi,

here is my lr fully made from brass and fully functional:
https://www.youtube.com/watch?v=9X4OYplz6WM
https://www.youtube.com/watch?v=IGQyHc11lPg

building hours of the giant around 1600h
JohnGalt
Posted: Sunday, November 01, 2020 4:43:45 PM

Rank: Advanced Member
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Joined: 6/27/2007
Posts: 1,461
Location: St. Louis, Missouri, USA
OAF wrote:
Hi,

here is my lr fully made from brass and fully functional:
https://www.youtube.com/watch?v=9X4OYplz6WM
https://www.youtube.com/watch?v=IGQyHc11lPg

building hours of the giant around 1600h


Outstanding! Applause Thanks for the links. The model looks and works great.
Ironstef70
Posted: Sunday, November 01, 2020 10:00:25 PM

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Joined: 6/27/2013
Posts: 880
Location: Quebec, Canada,
Wow, awesome project Markus That's way more than just adding motors Wink .

Thanks for sharing!

In the meantime, I am still progressing with some parts.
Reel drum motors are now completed (with spares), and tested.

Sorry for the weir picture (#1). Something happened during upload from the phone.


reel drum motors by Ironstef70, sur Flickr"/>

20201030_155902 by Ironstef70, sur Flickr"/>

Stef

___________________________________________________
Playing with toys since 1970, now building them.
Ironstef70
Posted: Monday, November 09, 2020 11:25:59 PM

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Joined: 6/27/2013
Posts: 880
Location: Quebec, Canada,
So I have just finished the control box, now it is ready for testing the motors, including the missing one.

It features a huge fan, and I am not worried about dropping it on the floor Wink I wanted it to have an industrial design, but it turns out that it is being overly designed for robustness, considering the environment where it will be used.

LR1750 Control box by Ironstef70, sur Flickr "/>

Finished control box by Ironstef70, sur Flickr "/>

Then since I am still waiting for parts, I decided to do some rigging equipment in the meantime.

Design was inspired by this one, but I purposely made mines beefier (to scale):

Dima Mammoet load spreader

20201106_210020 by Ironstef70, sur Flickr"/>

20201106_205902 by Ironstef70, sur Flickr"/>


LS inspection by Ironstef70, sur Flickr"/>

Mammoet load spreaders (3) by Ironstef70, sur Flickr"/>

Mammoet Load spreaders by Ironstef70, sur Flickr"/>

S





___________________________________________________
Playing with toys since 1970, now building them.
Ironstef70
Posted: Wednesday, November 25, 2020 9:57:36 PM

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Joined: 6/27/2013
Posts: 880
Location: Quebec, Canada,
Been procrastinating again, but I have finally received the missing parts last Friday.

Still I am now considering redesigning the pivot transmission by building a homemade gear box, rather than the current direct drive. I have a 10RPM worm gear motor, and the current gear ratio would split it by 4, but that still feels a bit fast to me.

I have solved short circuits issues in the control console. She sits on my new work bench.

And almost all drum motors are installed. More pics to come soon.

6 Boom seat & LR console by Ironstef70, sur Flickr "/>


Stef





___________________________________________________
Playing with toys since 1970, now building them.
Davie82
Posted: Friday, November 27, 2020 6:18:15 AM
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Joined: 5/11/2009
Posts: 554
Looking great - the rigging is very nicely done.

With worm drives do you have any problems with friction, or is the required torque not high enough to cause problems?
Ironstef70
Posted: Friday, November 27, 2020 3:03:47 PM

Rank: Advanced Member
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Joined: 6/27/2013
Posts: 880
Location: Quebec, Canada,
Davie82 wrote:
Looking great - the rigging is very nicely done.

With worm drives do you have any problems with friction, or is the required torque not high enough to cause problems?


I haven't tested the pivot yet, but in regard to the tests I have made with the track, I was very impressed. They happen to be noisy a bit, but they sure have enough torque to turn the crane around, especially with needle bearings mount. I just want to make sure I am able to obtain a "prototypical" speed with low RPMs, otherwise, this will look somewhat "toyish".

I much prefer realism to fast operation. We're not talking about the average Tonka digger here. These are pricey toys, so I think they deserve the time and attention Wink

Besides, thanks for the nice comments. We'll get back to the rigging accessories once the crane is done. They are meant to be used along with some loads I have here.

Stef

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Playing with toys since 1970, now building them.
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