Black Horse Pitts S2

[Dean Hunter]

I have a BH Pitts S2 (60" The instructions are confusing re the CoG. Web search suggests that the CoG position can vary hugely ??? Has anyone any experience of this models CoG?

[Denis Watkins]

I fly I/ C Dean, so take what you can

I expect a model to change weight in flight and they do

I have both a 60" Tiger Moth and The BH 60" and both balance 106mm to 112mm from top leading edge

On top of this, both change as C of G goes aft as the flight progresses

These bipes collectively, in plan view, have a good size chord which tolerates change

If your BH is electric, 112mm is a good start

[john stones 1 - Moderator]

C.G info will give you a range to choose from, start at a forward point, fly it and adjust to suit your style.

[Dean Hunter]

Denis/John

I fly i/c.So CG will change during flight. The manual says 70mm +/- 10mm, tho some manuals for the same model say lower and some flyers suggest 125mm.

I will start about 70mm ands how it goes, moving the CG back is easier than moving it forward.

Many thanks.

[john stones 1 - Moderator]

Pitts are O.K Dean, they don't do owt nasty, tweak it and enjoy.

[Nigel R]

Standard biplane behaviours I'd guess? Steep approach, keep some power on? Like to keep spinning unless a bit of opposite rudder and power is used?

[Richard Wills 2]

I have the Blackhorse Pitts, and the manual position is too far forward. I added weight to the tail gradually and ended up happy at 130mm. At 70mm landings were like a freight train and flares were impossible.