E-Props
Accessories

Spacer — ESA

ESA is E-Props' carbon spacer system for direct-drive installations — the same exclusive approach as the ESU spacer on E-Props' other ranges, adapted to Lycoming, Continental and equivalent engines.

E-Props hub and ESA carbon spacer assembly
Description

A carbon spacer, built into the hub

The ESA spacer positions the propeller relative to the engine, at the length your installation requires. It is a carbon part of the hub itself — not a bolted-on aluminum add-on — which keeps assembly simple and avoids the extra screws and stacks that often cause vibration.

See the Manufacturing Process
Mass Gain

13 times lighter than aluminum

Carbon ESA

1.5 g/mm
including screws and bolts

Standard Aluminum Spacer

20 g/mm
including screws and bolts

Example: a 120 mm extension weighs about 0.18 kg in carbon versus roughly 2.4 kg in aluminum — a difference of over 2 kg on that extension alone.

Available Lengths

From -15 to 230 mm, in 5 mm increments

E-Props' automatic production process cuts each ESA spacer to the exact length your installation needs.

ASCALON mounts directly on the engine flange — no intermediate adapter plate. Bolt pattern (4", SAE1, SAE2 AN6, SAE2 AN8) is matched to your engine when you order.

Never cut an E-Props ESA spacer. It is designed and manufactured for a defined length — cutting it destroys its mechanical strength. It is strictly forbidden to fly with an ESA spacer that has been cut.

Ready to spec your ESA spacer?

Tell us your engine and installation details and we'll help you determine the right length.

Ask About Your Length