Diamond Meteor Pro. A sub 20g pusher tiny whoop with 35mm props!

By SpeziLover on Oct 10, 2022

19  899  2

Diamond Meteor Pro. A sub 20g pusher tiny whoop with 35mm props!

This is a mod for meteor pro frame of Betafpv. More details: https://www.instagram.com/p/CjBv2YfoVi8/?utm_source=ig_web_copy_link and https://www.thingiverse.com/thing:5536503
In early 2020 I designed the first pusher mod for the meteor frame. I have adopted this principle on the new Meteor pro frame with 35mm props.

Why pusher?

The goal is to fly a light whoop on 35mm props. However, you can only mount Betafpv FC (external VTX necessary) in the Betafpv meteor pro frame, which is the reason for a higher weight. The frame uz65 got similiar problems and overall is not as good as the betafpv pro.

Why not mounting another fc with aio rx and vtx?
The problem is it doesn't fit in. You would have to put the flight controller higher with spacers. This causes the problem that the whole profile of the whoop gets higher which also negatively affects the center of gravity. If we flip the frame and add new mount options, I can fly any flight controller and have a compact center of gravity. I can also fly different lipo positions which is a cool way of customizing.

Advantages of my Mod:

  • Fly any flight controller on the Meteor Pro Frame
  • Easy to reach under 20 grams on 35 mm props !!
  • Use diffrent lipo slots (diffrent lipo size, check out my thingiverse)
  • New mounting option for digital whoops on 35mm props
  • Fly different lipo positions. Customize your whoop....
  1. The Classic racer
    Full Size Canopy on top, lipo at bottom.

  2. Low profile racer
    Camera in front. Lipo at bottom.

  3. Duckface whoop
    Top mounted liposlot including camholder for 199c fpv cam.

  4. Low profile freestyler
    Camera in front. Lipo at top left to right or right to left.

What do you need?

  • Meteor Pro Frame and 35mm Props
  • M2 nylon screws and nuts (min. 5mm long)
  • when using low profile mount : 2x longer M1.6 screws
  • printed parts which u want (at least liposlot) -> https://www.thingiverse.com/thing:5536503
  • Hardware

What do you have to do ?

  1. Remove the lipo slot of the meteor pro frame
  2. turn the frame upside down. Remove two struts per duct. (Improving airflow+weight saving)
  3. Drill holes and use nylon/plastic screws for a stack build. (see pictures).
  4. Place the flight controller, new printed lipo slot where u want and motors.
  5. shorten the nylon/plastic screws
  6. mount props upside down !! (See pictures)

NOTE:

  • It is really important to soft mount the flight Controller very well. The screws that holding the flight controller in place must not be tightened too tightly or too loosely. (that is why u have to use m2 screws with nuts and not these short fc mounting screws!!)
  • The holes of the printed parts are small. If this causes problems use a lighter and heat very slightly.
  • check that the Flight controller is placed correctly and does not press on the frame.
  • If the flight controller presses on the frame, there are the following solutions
    1. ---> Mount the flight controller reversed
    2. ---> cut away pieces where the Fc is pressing.
  • it is very important to keep the weight down. If you use full size flight controllers, be sure to remove motor plugs, use light motors and canopy, nylon screws and stuff like that... The goal is sub 20 g and high kv motors.

I recommend the Classic and Low profile racer. Also for freestylers. My tests have shown that the performance is most balanced.
Note: When flying top mounted versions i recommend to use two small screws as "landing pad" to give props more space and protect them. Screw them in these empty holes of the frame (left and right).

The Diamond meteor pro

Since we know how the mod is done. What are the best parts?

This is my setup.

  • Happymodel Diamond Fc
  • Gemfan 35mm props
  • 0802 hglrc 25,000kv motors
  • c199 fpv cam
  • 2/3 nylon screws per motor
  • 20 awg bt 2.0 lipo cable
  • Configurator: latest bluejay ESC Firmware 48 khz pwm freq. Betaflight 4.3

I also have tested 0702 26kkv motors. Weight is 18,4. But I didn't like it

If you do a clean job you will have a powerful whoop. Its worth it.


Hope u like !

Photos

Discussion

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StickyRice   Oct 12, 2022  
1

First of all, I like how clean your build was and how organized this article is. Really makes it easy for us to try it out ourselves. Second, I saw in one of the pictures a version with the battery above the fc and below the camera. How did that feel in terms of flight characteristics? and did it have any advantages? I've been thinking about something like that for a while for a toothpick with the battery mounted sideways instead of front to back (like your version) but always dismissed it.

SpeziLover   Oct 13, 2022 
1

Thx. over all this setup is of course flyable. but i noticed problems: Could not fix 100 % propwashing and little bit wobbles on roll when flying angle. However, I have not invested much time to test and tune so far. But there are also positive points. Feels like more thrust and
there are indications that this method may be more efficient (?). But this is still experimental. i think it has potential especially for non-ducted frames. i will do more tests and tuning in future.

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