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NEW AVA Pro-e Flapped F5J
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| Code: |
AVA-PRO-EF |
| Description: |
The Vladimir's Models AVA Pro-ef is an improved version of the world renowned electric AVA-ef. Probably no rudder-elevator eSoarer has a better reputation and a more illustrious contest record than the AVA, so improving this already superb model is no mean feat. However Vladimir has incorporated these very significant upgrades in the AVA Pro-ef:
- The electric fuselage pod has been totally redesigned to use a beautifully executed canopy hatch rather than a nosecone, allowing the battery to be inserted and connected easily, improving usability on the field. Also the very slim slim pod has a carefully engineered wing pylon to reduce interference drag.
- The AVA Pro-e wing planform has been optimised to be more elliptical, and the construction of the tip panels improved to utilise a carbon D-box to be stiffer and stronger. The better adherence to the airfoil profile also gives a useful drag reduction.
- The flapped centre panel has been optimised to be lighter and stronger. The flap allows slower landings, improving accuracy and reducing landing stresses.
- The AVA Pro's tailplane has an improved planform and carbon D-box construction, increasing strength and reducing trim drag.
- The new fin has also been changed to use a molded fixed portion, with a lower drag tailboom attachment that incorporates a very clever quick release mechanism, to make the AVA Pro-ef more transportable.
- The tailboom has been strengthened and stiffened.
- The long pod allows large propellers to be fitted, and the rigid structure allows kilowatt class powertrains to be installed giving ultra fast climbs.
- The low wing loading ensures a very low min sink, and the ability to climb away in the weakest of thermals.
On the construction side, Vladimir has taken the build to a new level of completeness, so the AVA Pro-ef can be assembled in only a few hours. New work done by Vladimir to speed AVA Pro -ef final assembly:
- The flaps are ready hinged and all servo connection hardware is provided.
- All pushrods and horns have been fabricated, wires bent, etc.
- Fitting the servos in the fin has been simplified.
The only work required to compete the model is to glue the boom to the pod, attach the V mount and fin quick release clip, and install the powertrain & RC gear.
The AVA Pro-ef is a stable thermal duration eSoaring model suitable for near beginners and competition fliers alike, and the simple rudder, elevator, flap controls make it supremely easy to fly. Its light weight, prodigious strength, and state of the art design result in unequalled performance. Advanced fliers particularly like the wider speed range the flap allows.
History
The AVA Pro-ef is an evolutionary improvement of the AVA-ef, which was itself an electrified version of Dr Mark Drela's revolutionary Bubble Dancer, but with the letterbox spoiler replaced with a flap, as preferred by European fliers. The AVA was an implementation of Drela’s design using the free flight type construction techniques invented in Eastern Europe, and perfected by Vladimir. Like the Simply the Best and Organic ranges the AVA Pro wing has carbon capped ribs and a kevlar D box. Allied to a substantial kevlar wrapped carbon spar this results in a very rigid and almost unbreakable structure.
The aerodynamics are outstanding, utilising specially designed airfoils (no doubt in Xfoil, written by Mark Drela himself when he was a student), and a low drag V mounted tail plane, the AVA has a measured sink rate of 0.3m/s (60 ft per minute). The AVA Pro-ef can be built down to 51 oz, however despite the low wing loading the plane can cope with 15mph winds with ease.
Many have asked about the underslung fin. There is no need to worry, in all the years we have been selling the AVA and the AVA Pro not a single person has reported a broken fin or boom.
| AVA Pro-ef Specification |
| Wing span |
3.175m |
125 in |
| Wing area |
67.9dm2 |
1052 sq in |
| Length |
1.7m |
67 in |
| Typical flying weight |
1440g |
51 oz |
| Wing loading |
21.2g/dm2 |
7.0 oz/sq ft |
| EDA |
13.4 degrees |
| Aspect ratio |
14.8 |
| Wing airfoil |
AG24/25/26 |
| Tail airfoil |
HT14-HT15 |
| Fin airfoil |
HT13-HT12 |
| Spinner diameter |
38mm |
| Centre of Gravity |
100-108mm from wing leading edge |
| Controls |
Elevator, rudder, flap |
| AVA Pro-ef Typical Weights |
| Fuselage |
193g |
6.8 oz |
| Wing |
628g |
22.2 oz |
| Hoz tail |
25g |
0.9 oz |
| Vert tail |
39g |
1.4 oz |
| Accessories |
20g |
0.7 oz |
| Total structure |
905g |
31.9 oz |
| Recommended Servos |
| Elevator & rudder* |
Hyperion DS 09-AMD |
| Flap |
Hyperion DS12-* |
*In order to balance the model without using a very heavy motor we highly recommend that good quality 9g digital servos are used for the elevator and rudder controls. Even with these a prop/motor/ESC combination weighing about 320g will be required. |
| Price: |
£599.00
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| Quantity: |
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