top of page
Print, Build, & Fly Challenge!
Be a Part Of The Next Epic Release
TWIN TURBO-PROP MICRO 3D PRINTED SCALE COMMUTOR
Free Starter .STLs
Get Building Now
Modify & Optimize
Make it Your Own
3D Print
Quick Vase Mode Printing
Fly & Submit
Show Us What You've Got
How To Enter:
1. Download Free Files (Full Solid CAD Files Option Provided As Well)
2. Order Your Components (Starter BOM Below)
3. Modify & Prepare Your Winning Model For Printing
4. 3D Print & Build
5. Fly & Submit Your Footage to FlyHM3D@gmail.com
6. WIN!
-
Optimize, build, and successfully fly the lightest practical Model using 3D printed six-blade propellers.
​
-
Push the limits of lightweight design, efficient propulsion, and engineering creativity while maintaining the appearance and scale of the aircraft.
GOAL
-
74x CORE DOWNLOAD- ($74 value)
​
-
74x RETRACT DOWNLOAD- ($49 value)​
​
-
RETRACT DRIVER BOARD SHIPPED- ($50+ value)
​
-
$99 REIMBURSEMENT (If Purchased CAD File)
​
-
TWIN TURBO-PROP OFFICIAL RELEASE DOWNLOAD (At release time)
PRIZE
-
No Scaling. (size must remain)​
-
9 Oz / 255g Max Weight
-
3D Printed 6 Blade Propellers (100mm dia.)
-
Must Use Airframe Provided as a 3D Printed Model.
-
Model May Be Modified Using the Solid Cad files.
-
Any Materials May Be Used for Hardware, Links, Pushrods, Added Internal Structure etc.
-
You may use the recommended BOM or any alternative electronics of your choice.​​
​
​
RULES
FLIGHT REQUIREMENTS: ​​
​
-
The Aircraft Must Take Off From The Ground Under Its Own Power.​
​
-
The Aircraft Must Demonstrate Climbs, Turns, & Overall Stable Sustained Flight.​
​
-
The Aircraft Must Return To The Take-Off Location & Perform a Safe Landing.​
​
-
The Aircraft Must Remain Intact.
​
​
​WINNER SELECTION:
​​​
-
The first priority is a successful flight meeting all requirements above.
​
-
If no entrant completes every requirement, the best overall demonstration will be selected by HM3D.
SUBMISSION REQUIREMENTS:
Before midnight (MST) on Sunday, July 12, submit:
-
A video link showing the flight.
-
A complete list of electronics used.
-
A summary of any design or airframe modifications.
-
A brief explanation of your control setup and aircraft configuration.
​
Email submissions to:
FlyHM3D@gmail.com
Disclaimers & Important Information
​
File Package
-
The free download includes a rough, incomplete development airframe intended as a starting point for the challenge.
-
Included files contain the overall airframe geometry and dimensions necessary to begin development but are not intended to represent a finished production design.
-
Basic exploded views and assembly guidance are provided below on this page.
STEP Files
-
A complete SOLID CAD (.STEP) package is available separately for builders who wish to perform more extensive modifications.
-
Purchasing the STEP files is optional and is not required to participate.
-
If the overall challenge winner purchased the STEP package, the purchase price will be fully reimbursed.
File Availability
-
Challenge files are available only during the challenge period.
-
Downloads may be removed after the challenge concludes.
Intellectual Property
-
STL and STEP files remain the intellectual property of HM3D.
-
Files may not be shared, redistributed, uploaded elsewhere, resold, modified for resale, or used to manufacture products for commercial or financial gain.
-
Downloading the files constitutes acceptance of these terms.
Policies
-
By downloading the files or participating in the challenge, you agree to:
-
All HM3D Challenge Rules.
-
The general HM3D Terms and Policies published at FlyHM3D.com.
-
Safety
-
RC aircraft can cause injury or property damage if operated improperly.
-
Participants are solely responsible for designing, building, testing, and operating their aircraft safely.
-
Always follow local laws, AMA/MAAC (or your country's equivalent) guidelines, and fly only in safe, appropriate locations.
Liability
-
HM3D assumes no responsibility for injury, property damage, loss of equipment, unsuccessful builds, or any direct or indirect damages resulting from participation in this challenge or from the use of the provided files.
Submission Rights
-
By submitting an entry, you grant HM3D permission to display your name, photos, videos, and build information on FlyHM3D.com, YouTube, Facebook, and other HM3D media for the purpose of showcasing the challenge and its results.
Community Builds
-
Participants are encouraged to share their progress, testing, successes, and failures in the Facebook groups where this challenge originated.
-
Helping other builders is encouraged and is part of the spirit of the challenge.
HM3D Decisions
-
HM3D reserves the right to interpret the rules, verify submissions, determine challenge eligibility, and make the final decision regarding prize awards and winner selection.
Have Fun!
The goal of this challenge is to push lightweight aircraft design, learn together, and see just how far a community of talented builders can take a scale 3D printed Q400. Good luck!
bottom of page