Flying machines that go
fast have been a part of my life from the early days of setting control line
speed records, to pylon racing, to piloting supersonic jet fighters for the US
Navy. So, it is only natural that my company partakes in the recent interest in
seeing how fast E.D.F. jets can go. E.D.F. jet racing got its start at E-Jets
International in 2009. BVM Electra’s won the top 5 places without any special
preparations.
Some refined ground
rules were established for 2010, and again, BVM Electra’s won the top 5 places
with EVF units powering the top 3 racers. This year, we put a little extra
effort into the top 2 placing systems. We believe that Dustin’s 227 mph highest
speed and two way average of 218.5 mph is the best yet recorded under similar
conditions. Rob Lynch was just a few mph off this mark.
So, where is this all
going and what benefit does it have to the consumer?
For sure, the more Watts
one throws at the motor, the faster the plane can go. Using our standard of
3.85 volts per cell under load, this special Electra was propelled by 8,662.5
Watts. Attention to airframe drag is also important.
My 3rd place
12 cell, Electra consumed 6,883.8 Watts for a top speed of 208 mph and an
average of 197.5. The relationship between velocity and horsepower (Watts) is
clear, to go a little faster, you need a lot more power.
The top 3 EVF powered
Electra’s were efficient enough to make 4-5 runs at the radar and still have
plenty in reserve for a few show-off aerobatics and a safe approach and landing.
There is some value to
you in this pursuit when incremental gains in efficiency are accomplished and
applied to our products. But, the average EDF consumer that wants reliability
and long flight times, does not want these high amperage, high heat producing
motors in there scale or sport jets. They only spell trouble and expense.
Some EDF suppliers will
try to sell you systems that consume 140-200+ amps. These systems will eat the
batteries and crash your model when the limited supply of energy is soon
exhausted.
The BVM EVF (2) 10s and
12s systems draw 110-115 amps installed in a properly designed model. 99% of
our customers find that this is quite enough. They want reliability and flight
time.
Yes, we can sell the
special “Race” motors, but only to very experienced users who simply must have
200+ mph performance and fully understand how to handle it.
Personally, I like this
electric stuff, so you will see steady gains in airframe availability and
propulsion efficiency from BVM. It is also important to you that BVM
manufactures, owns, and keeps in house, all of the critical tooling, so that
what you buy today, can be serviced for many years to come.
It is a business model
that has worked for BVM for 25 years.
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