Team Evolvent-DARPA Lift Challenge Resources
It's Urgent
REGISTERED
Part 1 Completed
DARPA and Evolvent
Some of you know us as;
Gear and transmission design shop
Custom gear manufacturing shop
Makers of the Software GearCalculators.com
and none of that is changing.
Opportunity is unscheduled...
You might not know this about us but we have a very nice young and eager team along with some seasoned veterans, and the DARPA opportunity fits. Transferring and bridging knowledge.
The Lift Challenge could not be a better test or fit for our skill sets both from a design and manufacturing and execution standpoint.
Growth is good, but this is a serious challenge and it is going to sharpen and shape us for the better.
We felt strongly enough about this mission and how it fits ours. Check out our Patreon to see how you can help and for more details:
Investors (661) 333-3389
Here are some resources for you to link straight to the DARPA website. The links are scattered around their site, here they are in a more curated order:
Overall Announcement
History
Q&A
A favorite YouTuber tells the story of Kelly Johnson
- Timeline
- Next Meeting
- Interesing General Resources (with URL's)
- Relationships
- Sneak Peak Photos
Status
Nov 7, 2025 Became aware of Darpa Lift Challenge
Interim-Teambuilding, Research, Concept Ideas, Budgeting and Business
Nov14, 2025 first team meeting, Safety-Safety-Safety, and some tacos
Dec 7, 2025 Published Patreon Post
Interim-Teambuilding, Research, gather materials, review key technologies for success
Preliminary BOM to identify COTS vs. Manufactured, continue to breakdown problem into smaller pieces.
Dec 14, 2025 Team Meeting at Gear Manufacturing Site, hobbed a spur, prepped a bevel gear tester
Interim-Strategy, Concepts, Fundraising
Jan 5, 2025 Application for Team Evolvent Design submitted to DARPA
Jan 6, 2026 Wednesday 3 PM, 176 N. Olive St. Bring your work clothes, we are nearing completion of Proto-1, we need to push.
Training and Task Allocation:
- Travelers for Bevels are ready, let's get the blanks made and the generator setup.
- Blade design 1 ready for fixture design
- Thanks for bringing all the inspirational RC helicopters and chainsaw motors, you hit the target, free even if crusty
- CMM review and training
Good overview, but the rotation of the blades is incorrect - front rotor goes CCW.
Lots of gears to keep it syncronized
A great resource for any airfoil. Chinook uses complex variations of NACA 23015, 23012, 23010 and others. Experimentals Clark-Y and NACA 2212
They probably have it
As the area of the rotating disc increases, the lift increases
Counter-rotating rotors(covering some of the same area) are less efficient than when they do not overlap
Counter-rotating rotors do not necessarily need a tail rotor like helicopters
Maneuverability is better when loads are at the CG and held tightly to the airframe
Maneuverability burns fuel, more if windy, and even more depending on pilot skill
Increasing payload causes fuel burn to go up
Wings need a lot of speed to provide meaningful lift
2-stroke single piston air-cooled ICE engines have vibration and metric at 1 hp / 1 lb without fuel
4-stroke metric regarding mileage is worse than 2-strokes
Jets burn a lot of fuel
Perfection is the enemy of done
Many iterations are better than 1
Follow ALL the rules for better success
Let the novices speak, they are not clouded by too much knowledge
It is more fun when it seems impossible
Most dreams start really small, keep pencil and paper with you to capture