Team Evolvent-DARPA Lift Challenge Resources



It's Urgent

 

REGISTERED

Part 1 Completed

 

Two weights suspended above a checkered banner in a grassy field.

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


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

USA HAAS AND TOOLS
KAESER
Airfoil
Bevel Gear Testers
Electronics Bench
CMM
Bevel
Metal workpiece on a machining table with visible guide rails.
Close-up of a mechanical assembly with rods and wires, possibly a model helicopter.