Creating a RealFlight model with Blender

FYI Just also found the link to the KnifeEdge reference document for modeling examples and name usage isn’t working (for me at least).

In your model you can spilt the geo into two parts for naming without a part in the center or fuselage.

Some parts require a name like motors and spinner. But other parts do not like RMW could be anything like WingR.

Hello!

Sorry I missed this one.

Here are the RealFlight old docs that I found laying about on the internet. I hope they can prove of some use, but I know that they can also be somewhat confusing.

Hello @Georacer,

Thank you so much for this detailed approach for building a model to be imported in RealFlight. I am sorry for publishing my concern in your post but I think this it will be the most suitable place to have my question answered.

I noticed some models have a camera view that is needed to be defined so that I can have a certain view perspective of the drone in RealFlight. I was wondering when such step is needed to be done? Is it in realFlight physics editor itself or is it in Blender and then realflight aircraft editor will detect it?

To clarify, im trying to have a tail view facing the drone and have vision following the drone while flying using ardupilot sitl.

I appreciate your guidance.

Hi! If I remember correctly you don’t need to define a new part for the camera position; RealFlight allows you to place a camera wherever you want. Try it out!

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I am sorry to bother you again, and to interrupt this blog. I am facing a difficulty to understand where exactly does Realflight consider the physical reference point.

I have designed a drone and created its blender model. Generally, when it comes to design, you consider your reference starting from the leading each of the wing and then you start building things up. I have now in blender all measurements relative to the leading edge of the main wing.

When i import the FBX file to RealFlight and use the phyiscal model from E-flite, the drone appears away from the graphics of my drone that i designed. So my question is, do you know what is the reference point of the phsyical model so that I can add the measurement as an offset on top of my original measurements? Or is there a way to ensure that the physical model reference point can match my referece or any reference i desire?

I would appreciate any points on that. Let me know if even im completely off with my thoughts.

Thank you.

As I write,

Move the fuselage pivot so that it lies approximately on the Center of Mass of the aircraft. Move the fuselage so that its origin also coincides with the World Origin.

RealFlight will also let you move the visuals as well, so it’s not that important, though.

Thank you again so much @Georacer. I was hoping that i can match the dimensions and offset distances since I have them noted down on a spreadsheet, but I already fixed the problem as you said by moving the physics to match the visuals.

[edit]: clarified my issue
I have one more issue and I hope you can help me out. Do you know if RealFlight Evolution aircraft editor apply any scaling down/up for the visuals once an FBX file is imported from Blender to RealFlight? I am facing this issue and i am not sure how to fix it. I created an aircraft in Blender and i want to match the physics from another aircraft to the visuals. I noticed that there are size difference in the wing length whenever i try to match the physical wing length and the visual wing length.

Is their a factor playing a role? I really want to make sure i have exactly the same dimensions in terms of sizes (wing, propeller diameter, etc). In Blender I have that the units i am using are metric and unit scale is 1.0

Your help is much appreciated!

Please read the guide more carefully, in the section related to mode export. You’re not supposed to export with a scaling factor of 1, but instead convert to inches with 1/2.54.

Apologies i missed that point. The thing is that I have the file already built in Blender and I simply save it as FBX file. Ill try save it with the scale you recommended. Thank you again.