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Please check specs of Flight Rig motors (Roman Design)

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by floridianer, Feb 25, 2024.

  1. floridianer

    floridianer New Member

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    Hello,

    I'm currently building my flight rig based on the Roman Design Project and still need the appropriate motors. While I am about to order the motors from PGSAW ( https://www.ebay.de/itm/354052076387 )
    , I have now found the following motors for which I would not have to pay 150 euros for shipping. Can you please tell me how important rotation speed is? I believe that in terms of gear ratio and torque, these engines are very suitable for the project. I'm just unsure if the speed is enough.

    upload_2024-2-25_11-15-49.png
    floridianer, Feb 25, 2024
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    3DOF, DC motor, JRK
    I am a bit skeptical of the 87.8n from 120.9W, do you have further information and a link.
    noorbeast, Feb 25, 2024
    #2
  3. floridianer

    floridianer New Member

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    floridianer, Feb 25, 2024
    #3
  4. floridianer

    floridianer New Member

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    What makes you so skeptical?
    How do you estimate the idle speed? Would this be enough or is the motor too slow?
    floridianer, Feb 27, 2024
    #4
  5. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    I am skeptical in terms of the motors only being 1300 rpm, based on 50:1 and 26rpm output, driven by 120.9W.

    Compare that to the PGSAW motor specs. Or these from Motion Dynamics: https://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html

    I would expect the 120.9W motors to put out around 10nm torque, the 87.8nm just does not seem likely.
    noorbeast, Feb 27, 2024
    #5
  6. floridianer

    floridianer New Member

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    Ok, thanks for your support. So now I buy the motors from pgsaw. The shipping costs are outrageously high, but I also want to have motors that serve their purpose.
    floridianer, Feb 27, 2024
    #6
  7. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    Have you considered other possibilities, wheelchair motors are often available in more localities, both used and new, and are often more powerful than the PGSAW motors.
    noorbeast, Feb 27, 2024
    #7
  8. Attyla.pl

    Attyla.pl Active Member

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    Hi I am also building a motion sim for flying, I already have the bigger part behind me.
    I will hint that the joint that Roman Design used is not the best idea, it's hard to make it accurate, I used a joint from the steering wheel from a bus is at a similar price and much more accurate.
    If you have questions I will be happy to help.
    Attyla.pl, Feb 29, 2024
    #8
  9. Ronan Design

    Ronan Design Roman Design - Custom MSFS Scenery

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    My Motion Simulator:
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    I was digging up some general info while planning a 6DOF build and stumbled upon this topic. I'm happy my build inspired someone! The rig is still working great after 3 years, though I'd do some things differently if I was building it now. Nothing major though, just a cleaner frame and better u-joint - that one is correct, I have no complaints but I only did that design because I couldn't find an inexpensive u-joint at that time. It seems that now there are some available that might work on Ali Express etc. However, some metalwork may be required to house them properly.

    PGSAW motors are good, though I'm hoping to use 6 wheelchair motors for the 6DOF build, because they are cheaper. Hopefully the force would be enough.

    I really like the wood frame actually. Wood has some inherent flex, which is not noticeable, but I have no backlash, gearing etc. that many people complain about. I think the wood helps to smooth out such things. It's not jarring, but very powerful when needed. Perhaps it costs some precision, but for flight simulation it's perfect. Racing is really fun too, but I'm not an expert at that, maybe more precision is beneficial there.
    • Like Like x 1
    Ronan Design, Sep 20, 2024
    #9