helping you keep an eye on things...
The RCV rotating cylinder engine
RCV 35cc UAV JP8 engine under dynamometer test
- from http://www.rcvengines.com
Rotating cylinder engines: an introduction...
- from http://www.rcvengines.com
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RCV rotating cylinder engines |
The RCV60-SP engine
RCV engine information from http://rcvengines.com/rcv_modelhome.htm
|
engine |
capacity in cc |
weight in kg |
power output in kWatts |
kW / kg |
J/ccfam |
|
RCV60-SP 2:1 gear ratio |
10 |
0.570 |
0.670 at 5,400 rpm |
1.175 |
0.744 |
|
RCV90-SP 2:1 gear ratio |
15 |
0.785 |
1.120 at 5,400 rpm |
1.427 |
0.830 |
|
RCV120-SP 2:1 gear ratio |
20 |
1.000 |
1.340 at 5,400 rpm |
1.34 |
0.744 |
Notes:
- All RCV engines use " glow fuel" : methanol + 10 % nitromethane + 15% minimum synthetic castor oil lubricant.
- J/ccfam = energy in Joules per cc of fuel-air mixture
- For RCVxx-SP, J/ccfam = ( power_in_watts x 60 ) / (capacity_in_cc x rpm ) = measure of energy efficiency
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New RCV engine |
from http://www.sae.org/aeromag/techupdate/09-2006/2-26-8-5.pdf
An engine prototype displayed at the AUVSI Conference 2008 in San Diego.
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RCV engines for UAV applications - Heavy Fuel, JP8, JP5 |
The RCV engine is particularly suited to UAV applications because it runs extremely well on heavy fuels, typically generating the same power levels that it does on gasoline. The excellent JP5/JP8 running characteristics, are due to the compact combustion chamber and high internal turbulence levels, generated by the large squish area, sharp valve edges and rotating cylinder.
RCV have developed and patented a reliable cold start system, for use with heavy fuels.
Benefits include:-
These engines are designed to give low Brake Specific Fuel Consumption (BSFC) at part throttle:
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|
Observed on general RCV engines |
Fixed valve timing and compression engine (JP-8) |
Variable valve timing and compression engine (JP-8) |
Typical conventional automotive |
|
Specific power |
82 KW / litre |
82 KW / litre |
82 KW / litre |
75 KW / litre |
|
Power density |
630 g / KW |
< 350 g / KW |
< 400 g / KW |
500 - 600 g / KW |
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Full throttle BSFC |
290 g / KWhr |
270 g / KWhr |
270 g / KWhr |
300 g / KWhr |
|
Part throttle BSFC (25% load) |
|
396 g / KWhr |
331 g / KWhr |
440 g / KWhr |
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Links |
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Downloads |
- Slide Presentation by RCV, AutoExpo International Engine Conference, India 2004 (1.6 MB)
- Slide Presentation by RCV, SAE Small Engine & Technology Conference SETC2002 in Kyoto (335 kB)
- SAE Paper No. JSAE20024321, SETC2002 (757 kB)
© Barnard Microsystems Limited 2006 - 2008