Which new sailplanes can be ordered NOW with FES system?

Schempp-Hirth, world leading manufacturer of sailplanes, from Germany:

Ventus Sport FES, FAI 15-18m class, latest generation of Ventus, the ultimate choice for champions!

Discus 2c FES, 18m without flaps, perfect choice for aeroclubs and recreational pilots. Certified by EASA in 2017.

SAirKo - high performance sailplanes, from Lithuania:

LAK17B FES, latest generation of FAI 15-18-21m class sailplane, with max TO weight 600kg. Certified by EASA in 2014.

MiniLAK FES, New generation of selflaunching FAI 13,5m class sailplane.

HPH Sailplanes - high performance sailplanes, from Czech Republic:

HPH304 ES, 18m class sailplane, with strong safety cockpit and many other features. Certified by EASA in 2016.

Alisport - producer of UL self-launching sailplanes, from Italy:

Silent 2 Electro - FES, FAI 13,5m class sailplane (Annex II), certified by DAeC!

Is possible to retrofit used sailplanes registered in EU with FES?

For sailplanes, which are registered in EU - EASA environment, we can not offer FES retrofit due to complicated paperwork. So for used sailplane we do not offer retrofit, except in some special cases.

Unfortunately EASA do not consider so called "Experimental registration" like is arranged in US, but only exceptions are possible as Annex II types, which are then under responsibility of national aviation authorities.

Which types of sailplanes out of EASA might be suitable for FES installation?

1. Most important data is maximum weight of non lifting parts for specific sailplane (weight of everything including pilot, except the wings). It must have enough reserve for additional 45kg of weight in the fuselage. Most of the sailplanes which were designed to fly with some kind of engine, can be also FES equipped! It this requirement is not met, than is unfortunatelly not possible to install FES due to safety reasons.

2. Nose section should be round as possible. It could be also slightly elliptic or eggy shape, but not too much. For most types of sailplanes we could find a solution with special spinner or if this would be not possible we could adjust front part of fuselage so that shape would become more appropriate.


Here is rough explanation of procedures which are possible in European countries under currently valid EASA regulation regarding development and certification of new products.

Airworthiness and certification can be done in different ways, depending if this is EASA used sailplane, EASA new sailplane, or Annex II type - non EASA type of sailplane. Certified EASA sailplanes requires valid CoA (Certificate of Airworthiness). When sailplane is modified CoA is not valid anymore, and next options are available to become airworthy again:

Initially EASA Permit to fly - PtF can be arranged based on EASA Approval of flight conditions. One of the conditions EASA requires to issue an approval of flight conditions, is that application for certification project is applied to EASA. It can be applied only by DOA or ADOA organization.

LZ design is young company so unfortunately we do not hold yet a DOA or ADOA certificate. So we cooperate with other companies, and sailplane manufacturers which are usually certified as ADOA.


Used sailplanes: For countries under EASA regulations Restricted Supplemental Type Certificate (RSTC), could be issued theoretically. Unfortunately EASA do not have yet available suitable procedures so that we could be actually able to arrange RSTC for different types of sailplanes, (without cooperation of Type Certificate holder)

New sailplanes: Manufacturers of new sailplanes, which are also holders of TC (Type Certificate), can apply for a Restricted Type certificate RTC. This mean FES system would be certified as part of the sailplane.

UL (ultra light), Experimental or Home built sailplanes are excluded from EASA regulations as Annex II types. National Permit to fly can be issued, if accepted by local CAA. Certification is arranged according local regulations if it is required. 

Please check EASA fees and charges in order to understand costs involved in certification!

Price of FES installation

Depends on:

-is single or double seater sailplane?

-at new sailplanes where we are only suppliers of FES final price depends on manufacturer!

-is used sailplane but already FES prepared? or it is used pure sailplane?

-in which country is used sailplane registered? or country of intended registration for a new sailplane?

-Required type of certification EASA, Annex II type etc...?

Is FES available as a kit?

Installation of FES is quite demanding job which can not be done in a few days as you might imagine. It requires structural modifications of fuselage, mechanical and electrical installation. All this require certain skills and experiences. For proper and safe installation, some special tools and equipment is required.

Additionally each sailplane type has some specific features, which requires different parts and arrangements, which we must developed first.

In order to be legal to use your newly FES equipped sailplane, installation should be done by regulations and conditions as required by local regulations.

As you can see it is quite difficult to fulfil all this requirements, and it is questionable if at the end you would spend less money in your own project.

For all this reasons we would like to encourage you, to order a new FES equipped sailplane from a list of available new FES equipped sailplanes as above!

New developments

If you are developing a new model of powered sailplane, and you are interested in FES, let us know, so that we could advise you, what is important for later easier and successful integration of our FES system.