Aerospool was founded in 1991, shortly after the collapse of the Soviet Union, and quickly established a reputation for high quality work as a sub-contractor to a major German glider manufacturer. As experience was gained the company branched out into the design and manufacture of ultralight powered aircraft and the WT9 (Dynamic) is the current design, albeit much developed from the early examples of the WT9 type.
As you are bound to ask the question and the answer is that the designation WT are the designer`s initials, Tadeus Wala! (He will be aged 92 on 27th January 2024 and remains an active pilot.)
The highly successful WT9 first flew in 2001 and is now in its 7th iteration with over 900 having been constructed. Although early models may look
much the same as the current ones, the structure and detailed design has been substantially developed.
The 17 early examples currently on the UK register were built to an original BCAR(S) standard and certified to 450kg required a number of modifications to ensure compliance with that standard. Apart from the external appearance being broadly similar to the latest versions the current production aircraft bear only an external resemblance.
A policy of Continuous Improvement underpins everything Aerospool undertakes, and even a cursory look at their production standards, confirms this. Current models reveal significant structural and aerodynamic developments; the design has certainly moved with the times with the type now certified in the United Kingdom are 600kg LSM aircraft (Light Storts Microlight).
The very latest version is the WT9.15, known in the UK as the Super Dynamic, reveals many other developments not the least being a Rotax 915iS engine with a hydraulically actuated constant speed propeller coupled with changes to the fuselage aerodynamics including a larger tail and extended nose coupled with an overall increase in the strength of the structure.
It is in essence a substantially new design with a huge increase in performance including a cruising speed in excess of 140 kts, a rate of climb in the order of 2,000 ft/min and a cruising fuel consumption at this speed in the order of 20 l/hr. (Figures quoted are for the RG (Retractable Gear) version.)
In many countries the earlier Rotax 914 version has become a popular glider towing aircraft and it is already clear from sales in other countries that the new Super Dynamic is already well established in this role.
Not only is this new version proven to deliver outstanding performance coupled with miserly fuel consumption and very low operating costs, but it is a very low-maintenance design and in the UK the maintenance regime is under the auspices of the BMAA (British Microlight Aircraft Association).