looks like 3500 lb payload from 100ft around balloon
Mini balloon size for drones
Quad Copter concept for enclosed Hotair Balloon (more efficient and safe than other aircraft) mylar possibly coated with solar panel. might be able to be deflated and drove after too.
non commercial creative commons attribution / be kind licence – for private use and not for use in militant like application. the idea is for hotair + more aerodynamic shapes also omnidirectional pov control using gyroscopic forces from multi rotors.
WaterBomber hotair balloon concept, take off upwind and carry large payloads to fire. could heat the air in the center nozzle or some kinda thermal pulse chamber to go faster too.
city in the sky concept , possibly using solar + steam
combine this with hotair or helium and the sirkorsky prize could be redesigned to be much longer flights maybe 3 hours between 2 people with mini 300 watt backup generator.
100 watts per lb for airplanes and 200 watts per lb for helicopter.
Said as a general rule for quickdesign. tesla turbines are said to posess 10hp per lb of engine, you’ll need about 70hp or 52kw of generator hybrid to lift a 260 lb person on a multicopter as a guess. dirtbike , paramotor or boat motor would work.
https://www.ebay.ca/itm/Apollo-True-Power-3000W-5000W-AC-12V-24V-PMA-Wind-Turbine-Generator-Micro-Hydro/133354793496 2 of these could make 10000 watts according to the charts.
- Fan powered parachutes
- Multi copters – inflatable drones with helium support arms, can be scaled up.
- Fire fighting drones multiple laminar flow nozzles and a base pump with pump on drone to lessen the hose stiffness.
- Mud sprayers or starlite sprayers to spray bases of tree’s to reduce ground fires. also mud spray the cutlines tree’s and ground also cut the tops off the tree’s with explosives or drone tools.
- Other methods for fire reduction are sonic blasts and explosives that disperse powder.
if one engine fails you still have the other as backup, only downside is double the maintenance.(could swap them out with electric when hybrid powerplants are more viable.) 2 10hp lawnmower engines should do the trick too 175cc roughly just readjust the carbs and size propeller accordingly. 20 hp should be enough to get a small plane in the air , 50 – 70 watts per lb is minimum for airplanes according to google. so minimum hp required is 17 hp if the wings are designed properly as glider
secret to the avrocar I figured out after my other hotair ideas wold be to use the hot air to make it lighter.