Aachen FVA-7 "M 1a"
FVA came back towards gliders in the beginning of 1930. Firstly, the glider had made significant progress, and the second reason for the renewed focus on the glider was the appearance at the Institute of Aerodynamics a young wizard who designed and constructed a cheap glider with corresponding benefits for the Aviation Club Aachen. It was Hermann Mayer, who had in 1928 been learning to glide.
Hermann Mayer was not until much later an FVA member, but drawn more and more into the group by close links and treated as a normal member.
In 1929, he designed the "MI” glider. The “MI" was a high-wing strutted in deliberately simple design because it was intended as a training glider. Denoch this machine was the then advanced gliders only slightly inferior competition. The planting of club workshops they proved to be eminently suitable.
The "Aviation" 1929, No. 16 reported about this aircraft:
"It was intended in the design to create a not too difficult to fly and advanced students, good sail -performance training aircraft (hence limitation in the span and robust construction).
The curb weight of the machine is 118kg and is composed of the following individual weights:
• Wings: Centerpiece 22.3 kg, 23.6 kg per outer parts
• Hull 29.7 kg
• Seat 1.8 kg
• V- stems per 4.5 kg
• Height Control 5.6 kg
• Rudder 2.4 kg. The hull is planked front to rear spar with plywood back covered with fabric. The organic compound by means of belts, as they are used for sewing drive belt has proven very successful.
The wing has three parts continuous profile (Göttingen 535), the center piece is braced by V - stalks.
The ailerons are designed with torsion-resistant plywood nose, thereby achieved that most diagonals could be omitted. This advances the rowing center of gravity in the vicinity of the axis of rotation and vibration of the rudder risk is greatly reduced.
Wingspan 14,52 m
Wing area 17,0m
Aspect ratio l : 12.4
Wing loading 70kg leaders weight 11 kg / m². "
The success of Hermann Mayer on the Rhön competition in 1929 prompted the FVA turn now to build a "MI”. This machine was improved in detail and carried the designation "M la”. The design improvements probably come from Hermann Mayer and not by the FVA. The biggest change was an increase in the span of 16.5m compared with 14.5 m of "MI”.
It was ready just in time for the 1930 Rhön competition as the "M la”, flown by Rudi Patz. Unfortunately, the "M la” was damaged in a landing in the Rhön, so that the machine had to be repaired at Schleicher.
The Aviation Club Aachen had reported the “MI” and Mayer redesign "MS II". It can not be said with 100% certainty that the project was called FVA-7. It is most likely that the "M 1a” is meant as an extension to the "M 1 " by Hermann Mayer was constructed, although he was not FVA member, but a close associate at the time of construction of the " M 1".