I can comment on what's in the FS One sim. We have many Hangar 9
planes, and they are "sport scale". The Scaling Wizard in the sim
will scale up the size of the plane and the physics to match whatever
size is given. We've already done this with many of the baseline
airplanes to generate variants. I'm not sure what defines a "Giant
Scale" airplane, but here are some big planes - a lot of them scaled
up Hangar 9 planes. All but the MiG-15 are less than 100 lbs.
Those approaching 100-lbs fit in under the new AMA 100-lb
experimental category:

33% scale P-51 (scaled Hangar 9 P-51)
147-in Span (86-lb)

33% scale T-34 (scaled Hangar 9 T-34)
130-in Span (49-lb)

33% scale Texan (scaled Hangar 9 Texan)
166-in Span (87-lb)

33% scale Corsair (scaled Hangar 9 Corsair)
162-in Span (93-lb)

33% scale Cessna C182 Skylane (scaled Hangar 9 C182)
143-in Span (44-lb)

33% scale MiG-15 (scaled version of David Ribbe's BVM MiG-15)
131-in Span (141-lb)

33% scale J-3 Cub (scaled ParkZone J-3, looks like a big foam plane)
140-in Span (35-lb)

33% scale Ultimate TOC (scaled Hangar 9 Ultimate TOC)
77-in Span (18-lb)

33% scale FuntanaS 90 (simulates the Katana look and feel, scaled Hangar 9 FuntanaS 90)
96-in Span (19-lb) ultra light - version 1
96-in Span (26-lb) sized like the Krill Katana S 33% - version 2

33% scale Piper Pawnee (Peter Goldsmith's Pawnee towplane scaled up)
143-in Span (41-lb)

33% scale Swift (Peter Goldsmith's Swift sailplane scaled down)
165-in Span (14-lb)

33% Edge 540 (stock Hangar 9)
97-in Span (22.5-lb)

46% scale Ultimate TOC (stock Hangar 9)
110-in Span (40-lb)

47% scale FuntanaS 90 / Katana (sized like the Krill VOLEX Revolution 47% II)
136-in Span (44-lb)

And we also have several 100% scale variants. The 100% scaled planes
do not match their full scale counterparts because the propellers on a
lot of the above are low pitch and also we don't have variable pitch
like full scale airplanes sometimes have.

This is the list that's in the sim now. Until things are shipping
it's all tentative however.