What would you like to see kitted?

[Doc Modeler]

I've looked at it, its a real nice unit, they're proud of it if you know what I mean
Doc

[ProfLooney]

not real proud the price listed is with both the unit and the engine not just the unit alone. That has messed a lot of ppl up when they saw the price

[Doc Modeler]

Well it got me for sure. I got my Reeves unit at a time a while back when the Dollar and the Pound were somewhat favorably aligned. I dont remember exactly what I paid for it, but for as long as I looked at it and kept figuring the rate I jumped on it at the time. I still want to put it in a 1/3 Rol D VI. I think it would make a great power unit for it.
Doc

[Rittmeister]

Regarding the airfoil selections. This is something extremely important. Not that they be exact becuse at model scales, especially 1/4 or smeller some of the old profiles really are not that great. The French Eiffel sections are very thin, have rather narrow radius and quite undercambers. Makes for dreaful reynolds numbers at scale sizes and a bit tricky with internal structure. A lot of the british airfoils, especially the RAF 14 and 15 have poor model characteristics. Of all the later german arfoils are wonderful The Gottingen series, especially the 396 and 387 are almost identical in a lots of ways for the long type tried and true clark Y.
Accruacy of the airfoils naturally should be picked so the plane is relatively easy to fly. No nasty surprises. Of course it follows that as the scale goes up 1/3 or 1/2 that the realistic shapes perfom better and better, although even at these sizes the inherent nature of them can lead to unpleasant surprises.

[ProfLooney]

I tend to disaggree with the RAF 15 making bad models. all my brit designs use them and the guys building and flying them say they fly great. also the guys at the UK DP use proper airfoils and lot of RAF 15 used there and they have great flyers. the nice thing on the 15 is it is a thicker airfoil than normal. If your having problems I dont think its the airfoil but the incidence used. With the airfoils being underchambered and the "Hump" on the nose of say a RAF 15 you need to use the right incidences to get the airflow properly over them so they can use their job. a 2 to 3 deg incidence seems to work really good with these airfoils.

[Lucky Dog]

Originally Posted by ProfLooney

a 2 to 3 deg incidence seems to work really good with these airfoils.

Positive or negative?

[ProfLooney]

Positive to lift the nose up a little more and allow the air to get flowing over that lower hump which gives more lift to the wing. without the incidence the air flow goes more over the top of the wing than the bottom which pushes down thus you dont get the lift. usually with some underchambered airfoils even a 1 deg positive will make a huge difference

[kenl40009]

I'd vote for a Sopwith Dolphin as something out of the ordinary as a kit

[Fish man]

Mark down one vote for a dolphin! And I won't be that ridiculus about an airfoil shape. If a modeler is sweating an identical true scale airfoil and mine isn't.. well, if they want to provide a drawing we can cut them custom for a nominal fee of course.

Profloony, do you have any pics of your sopwith triplane?

Cheers

[Doc Modeler]

You go Fish Man
Doc