Razor Blades

Razor Blades Logo

Now Available!

Another 4 sets that have passed flight testing with flying colors! (Pun intended)

Razor blades are now available! Extensive flight testing has delivered results beyond our expectations!

Fly before you buy!

Can you make it to the PRA National convention in Mentone IN July 29th-Aug 1st? Bring your machine and drop by our display. We will have blade sets in 23′, 24′ and 25′ diameters for potential customers to demo. Do (did) you fly a legacy set of Dragon Wings with the teeter bolt in the top hole? Razor Blades are a drop-in replacement!

Razor Blades flight video

There are no shortcuts! Our aim is to produce the highest quality, most precise rotorcraft blades available. No expense has been spared to assure the precision and quality of these blades.

Blades are designed around an NACA 8H12 profile with reflex and a non-linear twist.

The end caps of Razor Blades are not simply cosmetic or just a way to plug a hole. These parts, as well as the leading-edge extrusions, require extensive machining. The end caps are keyed, bolted, and bonded to the leading-edge profile. This creates an extremely rigid base structure and additional surface area for the aerospace adhesive to bond the aluminum skins around the full perimeter. This dramatically increases the torsional stiffness and integrity of the finished blade assembly!

All components are CNC machined, and therefore precisely identical in size and weight.

The leading-edge extrusions are machined to within .001” in length of each other. The aluminum skins are laser cut to exact size.

IF (and it’s a big IF) additional balancing is required, we provide a balancing cavity (plugged with a fine thread set screw) for adding an adjustment weight.

An engraved slot up from this cavity hole provides a precise locating feature for blade stringing.

Adhesive Curing

The adhesive is then heat-set in our brand new, high-precision curing oven. The blades are held in perfect alignment with the proper airfoil shape and non-linear twist, while perfectly even pressure and temperature profile is applied during the curing cycle. All material certifications and process data is collected and saved with each set of blades produced.

Razor Blades curing oven

Our 12″ hub bar features a cylindrical pocket for the teeter block to nest into. Simple tracking adjustment via a setscrew with graduated markings pivot the blade set around the center of the teeter bolt hole, maintaining chord-wise balance of the system!

The 2.75° coning angle is precisely machined into the bar.

The blade straps feature the best of both worlds. The aluminum inner spacers are machined to precisely match the airfoil shape for even clamping pressure and secure connection as they lovingly cradle the blades. These are capped by a 3/16″ 4130 steel plate on top and bottom for fatigue resistance.

Full traceability of all material certifications and process control documentation!

Now available! Call to discuss your application and place an order. 507-243-3991

Blade sizing recommendation

Pricing and info:

23′ (11′ Blades and 1′ Hub bar) 51.23 lbs $2,650*

24′ (11.5′ Blades and 1′ Hub bar) 52.56 lbs $2,750*

25′ (12′ Blades and 1′ Hub bar) 54.49 lbs $2,850*

*Plus shipping – Shipping calculated on a per-order basis for best rates.

All crating and packaging expenses included

**Guaranteed shipping within 2 weeks of order placement! (Lead time for multiple blade sets will be quoted at time of order placement)

*** On-line order placement coming soon!

A friend of mine said that your tail looks really cool and was constructed with high precision.  That was so easy to install due to your fixing hardwares are made so precisely. He has been so satisfied at your precision machining and workmanship!    Mr. Yozaburo Imai  (Japan)