Part 12: 13B Rotary Engine Rebuild - My 76 Mazda RX-5 Cosmo Restoration
Just as I promised last episode, it is finally time to build the engine!
Part 12 of my RX-5 Cosmo restoration covers the entire process of building
the 6 port 13B Mazda rotary engine. While this engine is a hybrid of GSL-SE
RX-7 and Cosmo parts, the process is the same for any rotary from a 12A to
a 13B NA, 13B turbo, 13B-REW or any
other variant of the 13B. This video shows the whole process of the engine
build, starting from measuring the rotors and covering everything else
including clearancing the side seals, assembling the rotors, complete
assembly the short block, setting the eccentric shaft end play and
installing the front cover and everything underneath it. It's probably the
most complete engine build video outside of what you can buy from the
vendors, and as such, is an hour long. After this one, I'm going back to
videos under 20 minutes. But for now, grab a beverage of your choice, sit
back, and enjoy.
Mad Mike's Redbull Mazda RX7 (Tribute) - Drifting, what its all about!
Read the description for copyright notices and video sources:
These clips are not mine, NOR am I claiming them to be mine. (Never have).
I've collected the clips from the D1NZ events that have been posted up on
the channel http://www.youtube.com/user/sbpnzoversteer/ and any other
channels related to oversteer.
To Kenny, I am not claiming any rights and am only using the clips for
entertainment purposes (with some sexy syncing! haha) if you have an issue
with me using your material, please message me and we'll sort something out
from there. :)
Song used: The Amplifetes - Somebody New
20B PP - 20B PAC MX6 - SDR RX3 RX2 Rotary POWER CRAZY VIDEO!
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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).