Is your engine:
a boxer with divided crankcase (two reed valves) and simultaneous combustions?
What the divided crankcase offers?
Weight of the engine?
Weight of the electric generator and of the batteries?
Is your EFI ready? Some indication of its cost?
Close to 300gr/kWh BSFC (Brake Specific Fuel Consumption) means some 25% BTE (Brake Thermal Efficiency); what was the BSFC in case of non-EFI?
Did you see the two independent engines (each driving its own pair of counter-rotating propellers/rotors) of the Portable Flyer?
In case of an engine stall (or of broken toothed belt, or of a fall-apart propeller) the other engine (with its own propellers) allows a safe landing.
There are additional safety means, too (read the Device Technical Report, at https://www.pattakon.com/GoFly/index.html
About the Hybrid Flying Devices
Quote from http://www.pattakon.com/GoFly/Posts_to_GoFly_Forum.htm
June 30 2018
What is the core, the fundamental idea behind the “hybrid cars”?
The spark ignition reciprocating piston engine had, and still has, a BSFC (brake specific fuel consumption, given in gr of fuel consumed per kWh of mechanical energy produced) that significantly varies with the load.
When the load is light / partial, the BSFC increases or multiplies.
If the engine could operate only around its minimum BSFC point (load vs rpm plot), the mileage would maximize.
A typical 200bhp (at, say, 5,000rpm) medium car engine works, most of the time, at light load.
For instance, cruising on a level highway at 60mph (96Km/h) and, say, 2,000rpm, it is required no more than 15bhp, which is less than 20% load.
Following the slow traffic in a town, the required power is even lower and the engine runs at even lighter loads.
What the Hybrid cars do?
They put the engine to operate at heavy load (i.e. at low BSFC), they store the excessive amount of the mechanical energy into batteries and when the batteries are near fully charged the internal combustion engine is switched off and the car runs pure electric until the batteries are nearly discharged; then the engine is again switched on, and so on.
The penalty is the additional cost (batteries, electric generator, electric motor, cabling, control), the additional weight and the added complication.
What a hybrid system would offer to a Flying Device?
To make the problem more specific,
take the PORTABLE FLYER or the 2-seater POGO-FLYER (animation at http://www.pattakon.com/PatTol/POGO_FLYER.gif
) and replace the one OPRE Tilting Internal Combustion Engine by:
a pair of electric generators (each driven by a crankshaft of the other OPRE engine),
a heavy battery,
and a pair of electric motors, each driving its own propeller.
What makes you think that the electric / hybrid PORTABLE FLYER or POGO-FLYER is safer, or faster, or it can achieve a longer range or flight duration as compared to the original design?
On the contrary, the original version is cheaper and simpler (so more reliable), and more lightweight (the complete engine weighs some 8Kg / 18lb, several times lower than the weight of any battery / electric motor/generator set) and more efficient.
WHY MORE EFFICIENT?
Because each time you transform the energy (from mechanical, to electrical (by electric generators), to chemical (in the battery), back to electrical (in the battery), and back to mechanical) there is an energy loss.
Put 95% efficiency (too optimistic) in each one of the above energy transformations, and you have an indication of the overall energy loss: some 20% of the initial mechanical energy is lost as heat.
if the electric hybrid POGO-FLYER could achieve a 400 – 600 miles range, the pure mechanical version (as in the animation) could achieve a 500 – 700 miles range.
I used nothing more than common sense and simple maths.
END OF QUOTE
The above quote is from a discussion with another contestant in the GoFly / BOEING forum.
On August 1, 2018 the forum and the posts were deleted by GoFly / Herox (and BOEING?).
Some of the discussions were saved at the https://www.pattakon.com/GoFly/index.html
and give a good idea of how much GoFly and Boeing were appreciated by the contestants.
Talking for the GoFly /BOEING, here is a youtube video after the "completion" of the contest.
Read the comments.