aerowoof

That is really neat that you’ve been Cold Duck fan for so many years and now it looks like you have all the stuff you need to get a build done. Plus a custom updated on-line build manual by the designer a mouse click away!

I thought it flew very well in 1969 but I always tried to reserve my excitement incase I’d been influenced by my design work. But as others saw it fly they commented on its flight characteristics and encourage me to get the design published.

The larger stab and elevator was worth the effort and improved the elevator power at slower speeds and added no negatives at high speed. With more elevator power it will make very slow nose high landings that are absolutely beautiful. Probably helps the snaps and spins as well. The guys in our club have been impressed with the new Duck’s flight characteristics and one of them is going to build one.

The old Veco 61 in the original didn’t have much power so the K.61 has been like supercharging the power! Probably twice the HP of the old Veco and I would think your HB 61 PDP power would be very close to the K.61. It is a little light in gusty winds at my current weight of 5.4 lbs and I would think it would be a great flyer at 6 ¼ lbs with the HB 61.

I’ve been told that the RCM Cold Duck article was very well received by the readers of RCM and many plans were sold but until the RCU build I didn’t have medium to get much feed back. Although in the early 70s I was on a business trip in Dayton Ohio and stopped by one of the hobby shops and a guy was building a Cold Duck!

I’ve really enjoyed flying the new Duck the last few months and I hope you will too. It would be great if could share your build experience with us on the forum.