![Experimental and numerical studies on small contra-rotating electrical ducted fan engines | SpringerLink Experimental and numerical studies on small contra-rotating electrical ducted fan engines | SpringerLink](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs13272-021-00517-7/MediaObjects/13272_2021_517_Fig3_HTML.jpg)
Experimental and numerical studies on small contra-rotating electrical ducted fan engines | SpringerLink
![Counter rotating fan mod with Artic and scythe fan on wraith prism 26.5c ambient max temp 30 mins of r23 66.7c pbo disabled. On stock prism it was 73c max rpm with Counter rotating fan mod with Artic and scythe fan on wraith prism 26.5c ambient max temp 30 mins of r23 66.7c pbo disabled. On stock prism it was 73c max rpm with](https://preview.redd.it/counter-rotating-fan-mod-with-artic-and-scythe-fan-on-v0-d1hv5z7oz0d91.jpg?width=640&crop=smart&auto=webp&s=7daa8c32c6ddcee8b631cf58152cfa9dcee6349d)
Counter rotating fan mod with Artic and scythe fan on wraith prism 26.5c ambient max temp 30 mins of r23 66.7c pbo disabled. On stock prism it was 73c max rpm with
![Playback Webinar: Development of Axial Contra Rotating Fans at ebm-papst St. Georgen with ADT's TURBOdesign Suite Playback Webinar: Development of Axial Contra Rotating Fans at ebm-papst St. Georgen with ADT's TURBOdesign Suite](https://blog.adtechnology.com/hs-fs/hubfs/Webinars/ADT%20and%20ebm-papst%20-%20Axial%20Contra%20Rotating%20Fans%20(April%202021)/Blog_post_image.png?width=600&name=Blog_post_image.png)
Playback Webinar: Development of Axial Contra Rotating Fans at ebm-papst St. Georgen with ADT's TURBOdesign Suite
![Experimental and numerical investigation of a gearless one-motor contra-rotating fan | Semantic Scholar Experimental and numerical investigation of a gearless one-motor contra-rotating fan | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/4c94b10f58648d719e448adc306d38e8297de118/2-Figure1-1.png)
Experimental and numerical investigation of a gearless one-motor contra-rotating fan | Semantic Scholar
![SANYO DENKI Develops 60 × 60 × 76 mm Long Life Counter Rotating Fan With the Highest Static Pressure in the Industry | Electronics Cooling SANYO DENKI Develops 60 × 60 × 76 mm Long Life Counter Rotating Fan With the Highest Static Pressure in the Industry | Electronics Cooling](https://www.electronics-cooling.com/wp-content/uploads/2018/05/9CRLA0612P0G001.jpg)