WORLDS FASTEST ROTARY 6.58@208 MPH
When are these guys going to stop breaking the records?? every time pac
performance goes out to the track, they put on a HUGE SHOW, a job well done
to George for steering the Pac Mazda 6 to all new hieghts more info coming
soon to http://www.rotorg33k.com
9 CYLINDER BENTLEY ROTARY ENGINE AVRO 504K - LMA RC MODEL AIRCRAFT SHOW - RAF COSFORD - 2013
ian redshaw flew the avro 504 in the video ,the builder and owner andy
johnston kindly gave me these details -
9 cylinder four stroke
33mm bore, cast iron liners of 1mm wall thickness and aluminium finned
347cc, compression ratio 5.6:1
Super unleaded petrol with belts'n'braces 50:1 oil mix. (I use Bel-Ray HR1
fully synthetic ester 2-stroke racing oil.)
Total loss force fed oil system via engine driven oil pump, approx. 30cc
per 10 min flight using Bel-Ray
Rpm range 700-3500
Prop. is 27 ½" diameter x approx. 23" pitch, period scale blade shape
made by EAT propellers, sadly now no longer since the death of Eric Thomas.
Avro 504K details:
¼ scale David Boddington/Nexus plans scaled up to 27% (to give sufficient
cowl clearance for engine)
Wingspan 116", 2.95m
O/A length 100", 2.54m
Covered in Linen Solartex, top surfaces sprayed with Flair Spectrum PC 10
All markings freehand with Humbrol
Two coats Ronseal Diamond Hard Matt varnish brushed on all over (isn't
affected by oil/petrol or nitro glow fuel )
All up weight 23kg
Futaba 12FG TX 2.4Gig
Futaba R-6014 HS RX x 2
SM Services Opto Isolators x 2
Ignition and RX batteries 2000mAhr Eneloop
Power to servos 3,300 NmH subC via opto isolators
Servos are a mix of Hitec metal geared and Futaba, all non-digital
16 ferrite rings to combat the interference from the unshielded vintage
The Avro was designed around the Bentley with the provision for exchanging
it for a Zenoah 62. The Avro's maiden flight was on 31st March 2012 with
the 62 (and 3kg lead up front, the difference in weight between it and the
Bentley) to prove the airframe and it was a great success so a further six
flights were made to complete the CAA tests on that day before making the
swap and further tests.
The Bentley engine build started in August 2004, it's test run was 9th
January 2008 and the maiden flight in the Avro was 6th April 2012.
There are no noticeable effects of gyroscopic precession from the rotating
Bentley affecting the handling unduly, just a slight difference in left and
right which may be due to torque and the coarse-pitch propeller. Twenty-two
flights with Bentley to date (23/07/2013).
FILMED AT AN RC MODEL AIRCRAFT SHOW RUN BY THE LMA ( LARGE MODEL
ASSOCIATION ) AT RAF COSFORD - WOLVERHAMPTON - SHROPSHIRE / STAFFORDSHIRE -
WV7 3EX OVER THE WEEKEND OF 20th & 21st JULY - 2013,
Banks Top Diesel Dragster: NHRDA Nationals
On March 6th, 2010 the Banks crew tested out the rail's new "Stroker" 427
cu. in., twin-turbo 7.0L Duramax engine
at the NHRDA Nationals in Wittmann, Arizona. The numbers for this trip out
were 7.670 @173.54. We were a little faster back in April 2009 when we ran 7.17 @
181.08. We've also run a best trap speed of 190MPH with the car on a
separate test session. All those runs were with our twin-turbo'd Duramax, and now we're getting set to hit
the track with a supercharged configuration. Stay tuned for that! More info
*** FUNNY *** Standing next to a 10,000 + Horsepower Nitro burning Top Fuel Hemi engine
*BEFORE COMMENTING* on actually how much horsepower is being made,
Check out my other video titled " 10,000 + horsepower from a modern Top
Fuel HEMI ! " Let Mike Dunn & Gary Gerold explain the facts to you first.
Standing next to a 10,000 + horsepower Top Fuel Hemi
engine. Everyone has to atleast once in thier lifetime!
Ahhh... The sights, smells and sounds of a Nitro Methane burning monster
Top Fuel Hemi engine. An exprience one doesn't soon forget. An experience
that can't properly be captured on a video. A sensation that'll leave you
in awe and always coming back for more!
*Old Info 2006* Drag racing is one of the most popular forms of motor sport
in this country. Hopped-up Hemis and blown big blocks shred tires and
thunder down the 1320 in no time flat. But even the quickest modified
street cars pale in comparison to the awesome power of Top Fuel Dragsters
& Funny Cars. In fact, the forces at work inside these cars are almost
unimaginable. Here are some specifics that really put top fuel power and
acceleration into perspective.
One Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4
rows at the Daytona 500.
Under full throttle, a dragster engine consumes 1½ gallons of nitromethane
per second; a fully loaded 747 consumes jet fuel at the same rate with 25%
less energy being produced.
A stock Dodge Hemi V8 engine cannot produce enough power to drive the
With 3000 CFM of air being rammed in by the Supercharger on overdrive, the fuel mixture is
compressed into a near solid form before ignition. Cylinders run on the
verge of hydraulic lock at full throttle.
At the stoichiometric 1.7:1 air/fuel mixture for nitromethane the flame
front temperature measures 7050 degrees F.
Nitromethane burns yellow. The spectacular white flame seen above the
stacks at night is raw burning hydrogen, dissociated from atmospheric water
vapor by the searing Exhaust gases.
Dual magnetos supply 44 amps to each spark plug. This is the output of an
arc welder in each cylinder.
Spark plug electrodes are totally consumed during a pass. After 1/2 way,
the engine is dieseling from compression plus the glow of Exhaust valves at 1400 degrees F. The engine can
only be shut down by cutting the fuel flow.
If spark momentarily fails early in the run, unburned nitro builds up in
the affected cylinders and then explodes with sufficient force to blow
cylinder heads off the block in pieces or split the block in half.
In order to exceed 300 mph in 4.5 seconds dragsters must accelerate at an
average of over 4G's. In order to reach 200 mph well before half-track, the
launch acceleration approaches 8G's. * Dragsters reach over 300 miles per
hour before you have completed reading this sentence.
Top Fuel Engines turn approximately 540 revolutions from light to light!
Including the burnout the engine must only survive 900 revolutions under
load. The redline is actually quite high at 9500 rpm.
The Bottom Line; Assuming all the equipment is paid off, the crew worked
for free, and for once NOTHING BLOWS UP, each run costs an estimated US
$1,000.00 per second. Putting all of this into perspective: You are driving
the average $140,000 Lingenfelter "twin-turbo" powered Corvette Z06. Over a mile up the
road, a Top Fuel dragster is staged and ready to launch down a quarter mile
strip as you pass.
You have the advantage of a flying start. You run the 'Vette hard up
through the gears and blast across the starting line and past the dragster
at an honest 200 mph.The 'tree' goes green for both of you at that moment.
The dragster launches and starts after you. You keep your foot down hard,
but you hear an incredibly brutal whine that sears your eardrums and within
3 seconds the dragster catches and passes you. He beats you to the finish
line, a quarter mile away from where you just passed him.
Think about it; from a standing start, the dragster had spotted you 200 mph
and not only caught, but nearly blasted you off the road when he passed you
within a mere 1320 foot long race course. That, folks is acceleration!