Hey Dan,

I'll let you know about those propellers ASAP--should be next week after I get them. Overall, I speculate the APC 13 x 6 2-blade props are probably best, but of the 3-blade options I know of, I'll have my final conclusions after testing the Graupners. To anybody out there who may be reading this thread, for the most security, I would start out with APC 13 x 6 2-blade props. Then, after you get the plane sorted out and your confidence in the engines up, you can go to whatever 3-blades we find out work best--unless the Graupners 3-blades outperform the APC 2-blades (which I doubt--I think it's a given that 2-blade props are more efficient than are 3-blade props). I'll keep ya'll posted about the propellers....

About engines, well, all I can say is look at the manual. The engine recommendations are printed on the cover (and on the box and any other promotional media). If someone wants to try something larger or smaller, well, you're on your own.

Regarding the .90 four-strokes, first of all, the engine mounts that come with the plane are rated for a .40-70, not for a .90. So, if you went with larger mounts, I don't think (I'm pretty certain) they would not fit on the firewall. Then there's the length of the engines. If they are longer, you'll have to move the cowl farther forward, then you'd have a large gap between the back of the cowls and the front of the nacelle covers. On and on. I understand you might already have brand new .90's and that's a lot of money, but you're kind of on your own if you want to go above the engine recommendation.

Tim


As for gas engines, I'm not even going to touch that one. Personally, they're just too big and heavy. Don't know if the nacelles would even support them (they certainly weren't designed for gas engines--same goes for the .90 four-strokes).

By the way, there is no added lead in this model (to answer Justin). Mine (and the prototypes) balanced with the battery mounted where shown in the manual (under the nose-gunner cockpit floor). No additional ballast was required (okay, I lied--the show model you've seen in the advertisements and any flying videos had the battery mounted down inside the fuselage just ahead of the nose steering servo--but then I had to add lead to the nose to get it to balance--If I would have mounted the battery up front in the first place it would have come out perfectly--as did my model which was built from a production kit same as what everybody else will be getting--not bragging, just answering the question and telling you what to expect).