Southern hemisphere autumn dieseling.
08-30-2014, 06:13 AM
#51
I started this thread at the beginning of winter so it's appropriate to add a little extra at the beginning of spring. Here's some assorted diesel picks from the flying field recently.
First a brace of Taifun Hobby's. The were made in Germany from 1954 on until the 1960's. They are 1.0cc capacity and just lovely to use.
These are Bob's and this just done a rebore/new piston job on 'em.
Rather an odd shaped venturi for a small diesel. It seems to me that the whole Taifun range of engines was "styled" by an Industrial Designer along the way into production.
KMD 2.5cc classic Russian diesel
Above: Bottom side view of the KMD 2.5cc diesel. This one is a bizza made up of the best bits of a number of engines. Really revs out on the APC 7x 5 Prop. It's doing 27secs/10 laps in the air which is the speed limit for Diesel Goodyear Racing. Very competitive.
Finally a Copella 09 Junior ABC diesel in a c/l flying wing. Additional cylinder cooling added and this one has the contra piston mod to stop it breaking cranks.
First a brace of Taifun Hobby's. The were made in Germany from 1954 on until the 1960's. They are 1.0cc capacity and just lovely to use.
These are Bob's and this just done a rebore/new piston job on 'em.
Rather an odd shaped venturi for a small diesel. It seems to me that the whole Taifun range of engines was "styled" by an Industrial Designer along the way into production.
KMD 2.5cc classic Russian diesel
Above: Bottom side view of the KMD 2.5cc diesel. This one is a bizza made up of the best bits of a number of engines. Really revs out on the APC 7x 5 Prop. It's doing 27secs/10 laps in the air which is the speed limit for Diesel Goodyear Racing. Very competitive.
Finally a Copella 09 Junior ABC diesel in a c/l flying wing. Additional cylinder cooling added and this one has the contra piston mod to stop it breaking cranks.
Last edited by qazimoto; 08-30-2014 at 06:41 AM.
09-01-2014, 09:08 AM
#52
Ray:
Some swell photos there! You've got that KMD set up as quite the screamer for those short duration laps. By the way, what's the purpose (and design) of that metal gizmo located on the fuel line? It almost looks like a miniature guillotine to cut off fuel flow, but you'd probably not resort to something that extreme, eh?
Thanks again for the early season shots.
Mo...
Some swell photos there! You've got that KMD set up as quite the screamer for those short duration laps. By the way, what's the purpose (and design) of that metal gizmo located on the fuel line? It almost looks like a miniature guillotine to cut off fuel flow, but you'd probably not resort to something that extreme, eh?
Thanks again for the early season shots.
Mo...
09-01-2014, 03:04 PM
#53
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Ray:
Some swell photos there! You've got that KMD set up as quite the screamer for those short duration laps. By the way, what's the purpose (and design) of that metal gizmo located on the fuel line? It almost looks like a miniature guillotine to cut off fuel flow, but you'd probably not resort to something that extreme, eh?
Thanks again for the early season shots.
Mo...
Some swell photos there! You've got that KMD set up as quite the screamer for those short duration laps. By the way, what's the purpose (and design) of that metal gizmo located on the fuel line? It almost looks like a miniature guillotine to cut off fuel flow, but you'd probably not resort to something that extreme, eh?
Thanks again for the early season shots.
Mo...
Close, that metal gizmo is a fuel shut off, and is designed to crimp the fuel line so that fuel stops flowing to the motor.
It is actuated by the pilot applying down elevator (closely followed by up elevator to restore control). The spring loaded shutoff then stops the engine in a position where the pilot can glide the model to the mechanic for refuelling and restarting.
It doesn't cut the fuel line.
09-01-2014, 04:14 PM
#54
Here's some clearer pics of a "cutoff" fitted to another diesel powered Goodyear racer.
The device is available locally for about $30 and as Greg has explained, is activated by momentary activation of full down elevator.
A cable runs from the "trigger" rearward to the elevator push rod.
The cable is terminated and made adjustable on the pushrod using the connector out of a standard electrical fitting.
It was raining when the pic was taken :-)
The device is available locally for about $30 and as Greg has explained, is activated by momentary activation of full down elevator.
A cable runs from the "trigger" rearward to the elevator push rod.
The cable is terminated and made adjustable on the pushrod using the connector out of a standard electrical fitting.
It was raining when the pic was taken :-)
Last edited by qazimoto; 09-01-2014 at 04:23 PM.
09-03-2014, 08:26 AM
#55
Gents:
Thanks for the explanation, Greg and the follow-up photos, Ray (hope you didn't need to get wet on my behalf). Yes, literally cutting the fuel line would be a messy way to get the job done! :-) It looks like the example has seen significant flying time, so it must be quite useful. Nice little invention, and a tip of the hat to the designer.
A bit off topic here, but you mentioned the aluminum (?) electrical fitting connector. In the U.S., aluminum electrical components (wire, connectors, receptacles, etc,) have pretty much been excluded in residential and light commercial structures. Not sure why, perhaps compatibility problems with copper components. I take it that you down-under guys can still wire with aluminium?
Dave Mo...
Thanks for the explanation, Greg and the follow-up photos, Ray (hope you didn't need to get wet on my behalf). Yes, literally cutting the fuel line would be a messy way to get the job done! :-) It looks like the example has seen significant flying time, so it must be quite useful. Nice little invention, and a tip of the hat to the designer.
A bit off topic here, but you mentioned the aluminum (?) electrical fitting connector. In the U.S., aluminum electrical components (wire, connectors, receptacles, etc,) have pretty much been excluded in residential and light commercial structures. Not sure why, perhaps compatibility problems with copper components. I take it that you down-under guys can still wire with aluminium?
Dave Mo...
09-03-2014, 05:22 PM
#56
Gents:
Thanks for the explanation, Greg and the follow-up photos, Ray (hope you didn't need to get wet on my behalf). Yes, literally cutting the fuel line would be a messy way to get the job done! :-) It looks like the example has seen significant flying time, so it must be quite useful. Nice little invention, and a tip of the hat to the designer.
A bit off topic here, but you mentioned the aluminum (?) electrical fitting connector. In the U.S., aluminum electrical components (wire, connectors, receptacles, etc,) have pretty much been excluded in residential and light commercial structures. Not sure why, perhaps compatibility problems with copper components. I take it that you down-under guys can still wire with aluminium?
Dave Mo...
Thanks for the explanation, Greg and the follow-up photos, Ray (hope you didn't need to get wet on my behalf). Yes, literally cutting the fuel line would be a messy way to get the job done! :-) It looks like the example has seen significant flying time, so it must be quite useful. Nice little invention, and a tip of the hat to the designer.
A bit off topic here, but you mentioned the aluminum (?) electrical fitting connector. In the U.S., aluminum electrical components (wire, connectors, receptacles, etc,) have pretty much been excluded in residential and light commercial structures. Not sure why, perhaps compatibility problems with copper components. I take it that you down-under guys can still wire with aluminium?
Dave Mo...
Dave,
the connector is brass. It's a bit heavier than it needs to be, so in newer models I've used a Do-Bro 1/8" ID Collet for the same task. I've replacing the grub screw with a short 4-40 socket headed bolt. The cable now goes around it's head.
I was vaguely aware that some parts of the US did previously allow Aluminium alloy house wiring. As far as I'm aware this was never the case in Australia. I suspect that it's a slightly better conductor than Copper and possibly cheaper, but not as mechanically durable.
09-30-2014, 02:12 AM
#57
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Today's effort was obviously Mid Spring, but equally enjoyable.
We flew Goodyear models (Mini & regular) using Oliver Cub, Parra & Nelson engines.
And let me add that it's a good thing we have retired from active racing, because we were hot & smooth.
We flew Goodyear models (Mini & regular) using Oliver Cub, Parra & Nelson engines.
And let me add that it's a good thing we have retired from active racing, because we were hot & smooth.
09-30-2014, 05:22 PM
#58
Indeed, Greggles old chap!
I thought that the engines ran particularly well, seeing we used winter fuel and that it was just over 30 degrees C.
Pic shows a Fora Junior .15 diesel powered Little Quickie Diesel Goodyear model. The tank is a uniflow fibre-glass and epoxy moulded experiment using Z-Poxy Finishing mix. Seems to work quite well.
Fortunately epoxy is very resistant to diesel fuel. :-)
Last edited by qazimoto; 09-30-2014 at 05:24 PM.
09-30-2014, 05:32 PM
#59
The pair of Little Quickies from yesterday. The red one is powered by a "steelie" Nelson .15 racing diesel, this time with a tin tank. IMHO the Nelson diesels were the best of the type ever made in the USA.
Last edited by qazimoto; 09-30-2014 at 05:34 PM.
10-01-2014, 05:38 AM
#62
The other Little Quickie has my favourite decal on the inboard wing.
It's Felix the Cat.
It was the inspiration of a 1930's Australian Cartoonist who went to the USA with the concept and had some considerable success.
It's also the signature image and the name of a local restored PBY-5A Catalina Flying Boat, which has a link to our local community built on the site of a ww2 RAAF Catalina Flying Boat Base.
In all perhaps not quite as sexy as m/s sparkplugs :-)
It's Felix the Cat.
It was the inspiration of a 1930's Australian Cartoonist who went to the USA with the concept and had some considerable success.
It's also the signature image and the name of a local restored PBY-5A Catalina Flying Boat, which has a link to our local community built on the site of a ww2 RAAF Catalina Flying Boat Base.
In all perhaps not quite as sexy as m/s sparkplugs :-)
Last edited by qazimoto; 10-01-2014 at 05:51 AM.
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10-01-2014, 10:27 PM
#64
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10-15-2014, 02:14 AM
#65
In the last week I've spent a few days in Sydney with a sick relative. On last Saturday I was able to make a visit to the KMFC club field at St Ives. This is arguably the best c/l field in the country.
During my visit I had a long talk to Wally Bollinger about his world record breaking effort the weekend before, in the Global Ringmaster Fly-A-Thon.
Wally built a "Goodyearised" 75% sized Ringmaster powered by one of Steve Rothwell's CS Oliver/R250 conversions.
It was set up with a cutoff and monowheel as well.
Wal and his team registered an amazing 265 separate flights using team race techniques. They used almost two litres of fuel and three props.
The engine is rather interesting. Steve R made a batch of about six converted CS Olivers diesels a few years ago using the remnants of his stock of bespoke CS crankshafts. He produced a new rod, and fitted a complete R250 top end. Wally's one ended up turning the test prop as good as a R250. Greg's one was about 300 rpm down. I believe that the UK Combat flyer Richard Herbert also got one. All the parts are now gone so they'll be no more.
Wall's engine hadn't run till the marathon, but feels great now. He's going to hang it up on the wall ready for next year.
During my visit I had a long talk to Wally Bollinger about his world record breaking effort the weekend before, in the Global Ringmaster Fly-A-Thon.
Wally built a "Goodyearised" 75% sized Ringmaster powered by one of Steve Rothwell's CS Oliver/R250 conversions.
It was set up with a cutoff and monowheel as well.
Wal and his team registered an amazing 265 separate flights using team race techniques. They used almost two litres of fuel and three props.
The engine is rather interesting. Steve R made a batch of about six converted CS Olivers diesels a few years ago using the remnants of his stock of bespoke CS crankshafts. He produced a new rod, and fitted a complete R250 top end. Wally's one ended up turning the test prop as good as a R250. Greg's one was about 300 rpm down. I believe that the UK Combat flyer Richard Herbert also got one. All the parts are now gone so they'll be no more.
Wall's engine hadn't run till the marathon, but feels great now. He's going to hang it up on the wall ready for next year.
Last edited by qazimoto; 10-15-2014 at 02:22 AM.
10-15-2014, 02:41 AM
#66
Talking about the 2014 Global Ringmaster Fly-A-Thon, here's my effort, a PAW 35 Diesel powered Ringmaster S1 (100%)
It flies quite nicely. Though I wouldn't describe it as nippy Perhaps the engine weight is a problem.
Seems like it's still running in, and while it had an 11 x 6 prop I'm not so sure that it's right for this engine. Starting isn't instantaneous, but I'm not used to mufflers. It's quite difficult to port prime. Fuel was 25:32:43 Kero. It's also been modified by the factory. Rumour has it that these originally had power issues.
Between Alan Mason and myself we only achieved three flights on the Ringmaster, so barely worth reporting. It was however a quiet day at the Mannering Park field with members away on grandparenting duties etc.
I'll hang it up now for next year.
It flies quite nicely. Though I wouldn't describe it as nippy Perhaps the engine weight is a problem.
Seems like it's still running in, and while it had an 11 x 6 prop I'm not so sure that it's right for this engine. Starting isn't instantaneous, but I'm not used to mufflers. It's quite difficult to port prime. Fuel was 25:32:43 Kero. It's also been modified by the factory. Rumour has it that these originally had power issues.
Between Alan Mason and myself we only achieved three flights on the Ringmaster, so barely worth reporting. It was however a quiet day at the Mannering Park field with members away on grandparenting duties etc.
I'll hang it up now for next year.
Last edited by qazimoto; 10-15-2014 at 02:46 AM.
10-16-2014, 01:18 PM
#67
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Talking about the 2014 Global Ringmaster Fly-A-Thon, here's my effort, a PAW 35 Diesel powered Ringmaster S1 (100%)
It flies quite nicely. Though I wouldn't describe it as nippy Perhaps the engine weight is a problem.
Seems like it's still running in, and while it had an 11 x 6 prop I'm not so sure that it's right for this engine. Starting isn't instantaneous, but I'm not used to mufflers. It's quite difficult to port prime.
It flies quite nicely. Though I wouldn't describe it as nippy Perhaps the engine weight is a problem.
Seems like it's still running in, and while it had an 11 x 6 prop I'm not so sure that it's right for this engine. Starting isn't instantaneous, but I'm not used to mufflers. It's quite difficult to port prime.
perhaps the lacklustre performance gave birth to the PAW 40? (At least that's how I heard it.)
Exhaust port priming when side mounted - try installing a pressure nipple on the top of the collector ring and prime through there.
Cheers.
10-16-2014, 02:57 PM
#68
Chris,
yes that's a solution!
Otherwise I could take the muffler off all together. The extra noise isn't likely to annoy the wombats.
Anyway it's up on the wall again till this time next year.
Time to move onto a new project.
Last edited by qazimoto; 10-16-2014 at 03:39 PM.
10-17-2014, 01:18 AM
#69
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Maybe the lack of nippyness was simply a function of turning an 11x6 at about 9000 rpm, and a bigger model would've been no slower? I found an 11x6 or 12x6 on a PAW 35 would power a 48 oz, 540 sq.in model very adequately. Plenty of thrust and a nice speed for a stunter, but that's not what you'd call 'nippy'. The Ringmaster mightn't have been fast, but I suspect the thrust/weight ratio would've been pretty good. Perhaps you've just been doing too much racing, Ray, and not enough of the less vulgar forms of CL? 
(Shame you weren't at KMFC for the Burford day last Sunday - a really nice day with perfect conditions, and as you say, it's a great field.)
(Shame you weren't at KMFC for the Burford day last Sunday - a really nice day with perfect conditions, and as you say, it's a great field.)
09-08-2015, 02:13 PM
#71
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Links to some snippets of the fun at Cowra MAC's "Oily Hand" 2015 meet. Kindly accept inclusion of footage of a few glow powered C/L aircraft.
Great fun, and a credit to the Cowra club members who organised it and all who participated.
https://www.youtube.com/watch?v=l6iI...em-subs_digest
https://www.youtube.com/watch?v=EmGrAPAMrRc
https://www.youtube.com/watch?v=L-NIxA6ZATk
https://www.youtube.com/watch?v=_I9e5bAzuvw
Great fun, and a credit to the Cowra club members who organised it and all who participated.
https://www.youtube.com/watch?v=l6iI...em-subs_digest
https://www.youtube.com/watch?v=EmGrAPAMrRc
https://www.youtube.com/watch?v=L-NIxA6ZATk
https://www.youtube.com/watch?v=_I9e5bAzuvw
