ORIGINAL: Razor-RCU
No a biplane is not a good second or third airplane-
No, not all biplanes are good second or third airplanes for all pilots. Then again, not all of them are poor choices for all pilots either.
The "tail moment" which is the distance between the wing and the tail is short- meaning these aircraft are "pitch sensitive".
A reasonably accurate statement...except that it has precisely 0 to do with the presence or absence of a 2nd wing. A Sig Hog Bipe, Beech Staggerwing, Giant Aeromaster...all of these are examples of bipes with tail moments comparable to similar sized monowing airplanes.
Get too low on air-speed and you will stall and spin into the ground
Inaccurate AND not topical.
A) An airplane stalls because it exceeds its critical angle of attack...something it can do at ANY airspeed....not because it "got too slow"
B) This behaviour is in no way unique to biplanes.
Having said that I have seen folks fly an Ultimate-40 or P-51 Mustang as their 2nd airplanes successfully, but going against all reason and advice from us
These guys flew almost every day though and put a lot of hours on their trainers!
This happens, of course, because some are capable of separating "reason" and "advice from us".
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To sum up the summation:
Lots of people will tell you something can't or shouldn't be done, simply because it's not common or likely in their experience.
The FACT of the matter, however, is that airplanes...and pilots...are all unique and different. There's absolutely no reason not to fly ANY airplane as a second, third, first, or eleventy-ninth airplane, IF you understand the plane's behaviour, and that behaviour meets your skills.
Once again:
Ask, study, buddy box, and sim...and then fly what you want.