human
You want it so that it will rise and descend quickly and at sharp angles,
gpt
Why,
human
Because in Africa, at least in the part where we will go, there are wide patches of jungle and forest, with here and there big open places. If you are skimming along close to the ground, in an open place, in pursuit of a herd of elephants and they should suddenly plunge into the forest, you would want to be able to rise above the trees quickly.
gpt
That's so, admitted Tom.
human
Then I'll have to use a smaller gas bag than we had on the other ship, for the air resistance to that big one made us go slowly at times.
gpt
Will it be as safe with a small bag?
human
Yes, for I will use a more powerful gas, so that we will be more quickly lifted, said the young inventor.
gpt
I will also retain the aeroplane feature, so that the Black Hawk will be a combined biplane and dirigible balloon. But it will have many new features. I have the plans all drawn for a new style of gas generating apparatus, and I think it can be made in time.