Specialities

Yak Propellers

GT Propellers is the world's only manufacturer of original Vperyod V530TA-D35 paddle blades.

Yak Propellers Experts

Immediately after the fall of the Berlin Wall, we gained access to radial aircraft propellers from ex-Eastern Bloc aircraft purchased throughout Europe. Most of these propellers featured variable pitch. We initially worked on them purely for maintenance, but by the early ’90s we had decided to upgrade these robust, counterweighted propellers. Most of them offer on-wing blade replacement capability, allowing blades to be changed directly in the field.

Since then, we have expanded our specific know-how, designing and producing new blades to replace the original Russian paddle blades. Nearly four decades of experience have made us leaders in upgrading and replacing B530D blades with a more modern, efficient design. The results have been so positive that our replacement blades and service are adopted by military schools, aerobatic clubs, dedicated Yak services, enthusiast communities, and Yak manufacturers.

After many years, we still cooperate with these aircraft’s production technicians and maintenance services around the world.

Blades and Propellers

We are currently the world’s only manufacturer of the original V530D paddle blades.

Over the years we have maintained a significant stock of original blades, while production of our new GT-design blades has reached nearly 1,000 units, in various sizes for specific applications.

Our GT design has proven to increase performance on the famous Yak-52 trainer — up to 10% more across the board. That’s why, after so many years, it remains one of our best-selling products.

We currently produce 7 different blade models compatible with the D hub, and 5 different three-blade propellers.

Housai Conversion

Thanks to our specific expertise, we have also converted the Housai engine, replacing the Chinese J6 blades with our own composite blades featuring an innovative scimitar design. The performance gains are outstanding on the 370 HP Super Housai engine, and very positive on the standard 280 HP stock version as well.

Services

Our current services on these propellers include:

Restoration of original Russian paddle blades
New production of Russian-design blades
Hub maintenance and modifications when required
Upgrade of Russian or Chinese hubs with GT blade design and spinner installation
On-field dynamic balancing
Full service and maintenance of our blades

In development: an innovative, digitally balanced composite spinner, compatible with both the V530D and the Chinese J6 version. The real advantages of this spinner are easy accessibility and installation procedures, ensuring better aircraft performance, improved dynamic balance results, better engine cooling, and a sleeker look.

We also carry out upgrades on other ex-Eastern Bloc propellers, such as PZL, Avia, Ash, VISh and similar models.

Side-by-side comparison of an aircraft with the original paddle blades and the same type with GT blades, captioned Old vs New — Original paddle blades and GT-design blades.

Red and white aircraft with a red two-blade propeller with white and blue tips, seen from the front on the apron — A beautiful South African Yak-52 fitted with our new GT2V-M14-250 propeller, squared tip version with nickel leading edge protection.

Front view of a red and white trainer aircraft with a white two-blade propeller with red tips and a red spinner — New airframe, new engine, new GT propeller: a newly built Yak-52 during its first run-up in Bacău, Romania, carried out by Aerostar S.A. technicians. Our propeller replaces the original Russian paddle-blade prop. The performance gain achieved simply by switching to GT blades is outstanding, and this upgrade has also been adopted by military trainers.

Close-up of a red and blue blade on a radial-engine aircraft painted red, blue and yellow — An original V530 propeller after servicing.

Technician on a stand working on a three-blade propeller with yellow tips on a radial-engine aircraft — Lithuanian technicians from Termikas during the installation of the new blades for testing.

Two pilots in flight suits beside a radial-engine aircraft with an orange spinner and white blades with red tips — Installation of the new GT blades and spinner on a Polish Yak-52 by Paolo and Alex Tonini.

Radial-engine aircraft with a red cowling, red spinner and white blades with red stripes on display in a hangar — A beautiful V530 propeller remanufactured by GT, following 100% original drawings from the Russian design bureau.

Front view of a red radial engine cowling with a red spinner and white blades with red stripes — Overhauled hub with newly remanufactured blades V530

Yellow and blue radial-engine aircraft in a hangar with a yellow propeller, a pilot looking out of the cockpit — Yak-55 powered by a 400 HP engine.

Front view of a yellow and blue aerobatic aircraft on a grass airfield at sunset, with a yellow three-blade propeller with black tips — This beautiful Unlimited Yak-55 features a powerful 400 HP M-14 driving our 260 cm GT3V-45 propeller.

Large polished paddle blade on a workbench in the workshop — Composite Hamilton Standard replica blades, a modern alternative to the original metal design, compatible with the V530D hub.

Three white blades with red tips standing upright in the workshop — From left to right: three different M14 blades, all newly manufactured by GT and compatible with the V530D hub. On the left, the original Vperod design (2.40 m); in the center, our modern squared tip version (2.50 m); on the right, a Rotol R19/5F5-style replica.

Close-up of the red tips of three white propeller blades — All these newly manufactured blades feature metal leading edge protection, while polymer protection is also available for some applications.

Black, red and dark blue propeller blades with metal roots, laid side by side — A selection of differently styled blades for M-14 and Huosai HS-6 engines, all compatible with the V530D hub. From left to right: GT2V-M14-250, GT2V-M14-250S and GT2V-HS6-250.

Close-up of the threaded metal roots of three painted propeller blades — The same blade can be adapted with different root designs

Three blades with black, red and white finishes and coloured tips on a white table — Two M14 blades in matte black and a red-refinished blade for a custom colour scheme.

Brass-coloured propeller hub with counterweights on a wooden base in the workshop — A counterweighted hub under maintenance.

Close-up inside the bore of a brass-coloured propeller hub — Inside the hub bore.

Brass-coloured counterweight arms and a hub body laid on a workbench — Counterweights and hub body during overhaul.