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Ritning: Nutta  
Ritningen är skapad av David Theunissen
Are you a nutter like me? Well then you may also enjoy this stunning little model. As Tim H puts it: "Cool... Have a NuthaNuttaButtaPeanutbuttaSandwichCookie..." but heed Mike Roberge's warning... "Nutta is like an 8 second bull ride"! "After increasing control throws "...she went from a house cat to a tiger. Tearing up the sky. Loops less than the plane length (well almost). Rolls on axis maybe not, rolls to fast to tell. After a 15 min flight with lipoly 700. I had to make myself a drink. Stiff drink!! Flew it in about 10k wind after the flight was over. Thats when I said that was fun." Search for 'Nutta' on the Ezone and you will see how much fun people are having. I fly mine outdoors in winds which are far too strong and have a ball. Rolling circles, tight loops within inches of the ground, touch the tail on the ground inverted... (take your Cyano and accelerator to the field; you will probably need it with these stunts!).
So what's it all about? Well, I wanted something a little 'curvier' than the AndNow. I wanted something which would roll quicker as the AndNow struggles a bit in confined spaces. And if it could be lighter and perform better, then why not! Nutta is about 4.4oz (125g) with two 560 Kokam Lithium-Polymer cells and the excellent Pixie 7 ESC. As on most of these models I am using 6g servos and Receiver with the Carbon Brushed GWS 'IPS' / 150BB motors (currently the 'S2' (3.5:1) with two 560 to 800 Lithiums). You will notice that the controls are fairly large (an understatement!) and move 45 degrees (each way!), so 30 or 40% exponential is definitely helpful to tame the beast. This setup is not for beginners but you can reduce the throws to quieten things down a bit.
I have a simple landing skid this time; my normal landing gear/wheels would add 6g. I've used a hollow 3mm carbon spar for the fuz which has proven to be more resilient than 5x5mm spruce (the spruce also weighs about 3.5g more). It still flies slowly but rolls and loops are excellent. Construction is similar to most of the other models on this page except that the single rib is made from balsa and is attached permanently to the fuz instead of the wing. The wing is not 'pre-formed' in any way but as usual it it best to let the natural curvature of the Depron help you. This approach yields quite a flat wing except for the center bit which follows the rib; this seems to work rather well. This approach also resulted in a smaller gap between the fuz spar and wing so the airleron servo has to be mounted off-centre. To ensure that each aileron moves the same, the aileron horns are similarly off-centre. The wing leading and trailing edge spars are from 2mm carbon and are glued on with Cyano and then secured with a strip of 20mm clear tape wrapped around the spar/edge. This yields a cleaner wing than with the spar attached under the wing in the middle somewhere. Notice how the motor and prop are held with rubber bands (a Futaba servo arm and 2 standard nuts are used behind the prop) on a shortened drive shaft; this approach helps prevent damage to the drive chain and fuz spar on most of these models. I attach the battery with Velcro.
As usual, email me if you have problems (or check the Ezone) and please send me colourful pictures. The plans are provided in the usual Adobe Acrobat and CAD formats. You will notice three full size templates to help address printing errors; use the one which has the most accurate 100mm 'reference line'.
Zip-file includes: PDF for 'A4' paper, PDF for 'Letter' paper, TurboCAD 6.2 TCW file, DXF file, DWG file.
Källa: http://www.flyelectric.ukgateway.net/
Ladda ner ritningen här: Nutta
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