# Propeller with the duct integrated vs propeller + a duct?

**URL:** https://foil.zone/t/propeller-with-the-duct-integrated-vs-propeller-a-duct/3137
**Category:** Props & Ducts
**Created:** [October 18, 2018, 7:43am UTC](https://foil.zone/t/propeller-with-the-duct-integrated-vs-propeller-a-duct/3137 "2018-10-18T07:43:02Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![superlefax](https://foil.zone/user_avatar/foil.zone/superlefax/32/13626_2.png) [@superlefax](https://foil.zone/u/superlefax)
#### Post date: [October 19, 2018, 7:14am UTC](https://foil.zone/t/propeller-with-the-duct-integrated-vs-propeller-a-duct/3137/6 "2018-10-19T07:14:04Z")

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I already tested this idea

 ![15399326818472898950344385727899](https://efoil.builders/uploads/default/original/2X/4/466506bab6761e96d87a57f230f23f84e9bd372a.jpeg)

The consumption is a nightmare! I was really surprised on this.

It is a modified hiorth propeller. Without spinning duct the hiorth propeller needs 38A @ 20 km/h on my setup.

With the spinning duct it is 100A @ 20 km/h.

I think there is no chance having an efficient propeller with spinning duct if it is 3D printed.

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