WMAC Group build - Impressivo

This afternoon I succumbed to senior committee members bullying me into test flying my Impressivo. The justification being that the other group members could benefit from the results. I admit not putting up much of a fight and realized that if it all went wrong, there would be time to repair / rebuild prior to the mass launch !!

You may find the following useful.

Mike Seal launched the model using one of my Kevlar sticky gloves. He said this provided better grip but more importantly they offered some protection from propeller rasp. I’ve had these a while but the ones in this link looks similar.
www.toolstation.com/shop/Workwear/Gloves...ves/d70/sd570/p44049

I held back applying full power before he let go. This was a mistake because when I went to full power, the surge in torque induced a violent left roll. The grass was seen ducking for safety ! - SO SET POWER PRIOR TO LAUNCH and don’t alter until flying speed reached.

With a 196gm battery mounted between the fwd wing dowel and the main bulkhead, the recommended C of G is exactly on the recommended 110 mm fwd of the Trailing edge which provided acceptable pitch stability for first flight.

However, with the recommended elevon control throws of 5mm - Pitch response was just enough but roll response was sluggish. Once trimmed, the model behaved well and on the recommended control throws, the model is stable and easy to fly but experienced fliers will want higher rates. Possibly 10mm aileron & 8mm elevator

The 1mm elevon up bias for launch was beneficial - I also switched this back in for landing which was uneventful.

My 6x3 prop draws 42amps static. The 2200mA battery was lightly warm after 5mins flight and had 40% capacity remaining.

Kevin
You missed out the most important bit... How FAST is it???

JonTappin wrote: Kevin
You missed out the most important bit... How FAST is it???

I would say "Fit for Purpose" but i just flew it - Simon. Mike , Phil. Chris H all watched on lets invite them to respond

You used a 6x3 (brand?) prop and I would say it was a fair bit faster than my Twinjet. Changing to a 5.25x4.75 (the prop I have on the TJ at the moment) would make it faster still. I don't think you'll be disappointed, Jon.

JonTappin wrote: Kevin
You missed out the most important bit... How FAST is it???

Its pretty quick and Kevin's choice of covering the top and bottom of the wing in the same colour made it interesting :huh:
But i think you will want the faster prop John :woohoo:

re Chris 73 -Kevin's choice of covering the top and bottom of the wing in the same colour made it interesting

I concur - but provided no body else uses my colour, at least i'll know which is my model (even though i may have to give the elevons a wiggle in pitch to determine which way up it is !!

But if one guy uses blue on the top and the adjacent plane uses blue on the bottom - That will also be interesting :silly: