Charger vs Bronco horizontal stabilizer volume?

While watching this video on the Convair Model 48 Charger, I was surprised by the dimensions of the horizontal stabilizer. Compared to the North American OV-10 Bronco, which is relatively similar in its general configuration, it seems gigantic. What are the aerodynamic reasons that lead to such a difference in horizontal stabilizer volume between the Charger and the Bronco?

To scale, both surface and lever arm are larger

• The Convair seems all in all a really disproportioned aircraft. What's with the wings, they look like they forgot outer panels... Sep 18 '21 at 21:48
• The Charger is about 34 feet long, while the Bronco is about 44 feet long (numbers from Wikipedia). That implies a greater moment arm on the Bronco, and a smaller tail to do the same job. Sep 19 '21 at 2:10

Convair worked very hard to develop a light multiservice aircraft with STOL capabilities. The short wingspan does not appear "normal" in proportion because prop wash and high lift devices were used extensively to improve lift. Power on, the wing lived in a higher airspeed environment than the tail (lift is proportional to V$$^2$$). The model 48 was designed to carry a variety of armaments and was even tested (with scale models) to be fitted with floats.