HPH 304eS at AERO 2015

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Breaking news...The HPH 304S with the FES (called the 304eS) is on display at AERO 2015. Here's a URL to a photo on Facebook...

https://www.facebook.com/HphSailplanesUK/photos/pcb.802631923159081/802631503159123/?type=1&theater

[Bastoune]

Self launch?

[Renny[_2_]]

On Wednesday, April 15, 2015 at 2:15:59 PM UTC-6, Bastoune wrote:
> Self launch?

On heavier gliders like the 304eS, LAK-17B FES and Ventus 2cxa FES, the FES would normally be used as a sustainer. On lighter gliders it can be used to self-launch such as on the Silent 2 Electro...

[kirk.stant]

I wonder if it would be possible to use a single blade prop (yes, they exist, look it up) and have it stored in a recess under the nose when stopped, to minimize drag.

That would be a bit more complicated (for the door to cover the prop) but would probably make the FES more acceptable to hard-core racers.

FESBPS, anyone?

[Steve Leonard[_2_]]

On Thursday, April 16, 2015 at 11:59:50 AM UTC-5, kirk.stant wrote:
> I wonder if it would be possible to use a single blade prop (yes, they exist, look it up) and have it stored in a recess under the nose when stopped, to minimize drag.
>
> That would be a bit more complicated (for the door to cover the prop) but would probably make the FES more acceptable to hard-core racers.
>
> FESBPS, anyone?

There are several dynamics issues with the single blade prop that would require a lot of effort to resolve if you are to be able to fold and stow the single blade (counterbalance weight, and where will it go?). Might be easier to stick with the two blades and stow them in recesses in the nose, similar to big wipers. Or, as you suggested, inside doors. for the hardcore racers.

[Jonathan St. Cloud]

Hiller made a helicopter with a single blade, counter weight on the other side.

[jfitch]

On Thursday, April 16, 2015 at 9:59:50 AM UTC-7, kirk.stant wrote:
> I wonder if it would be possible to use a single blade prop (yes, they exist, look it up) and have it stored in a recess under the nose when stopped, to minimize drag.
>
> That would be a bit more complicated (for the door to cover the prop) but would probably make the FES more acceptable to hard-core racers.
>
> FESBPS, anyone?

Plus, no ground clearance issues to take off, always keep the blade up!

:)