Old Koreelah

...I know one guy who extracts the engine bay air from directly behind the Jab engine rather than a torturous exit path in an aim to help cooling for example.

...Avgas is not readily available in most Communities and the chances to get Mogas are generally better...

It would be cheaper and faster to go Qantas First Class- and I could carry more baggage and would definitely get here.

But we can still dream. Fuel availability is a big issue and getting bigger. Does anyone know how a Jab runs on Opal fuel? It's rated at 91 RON, so I guess it's a no-no.

Interesting comment Turbo ! My recollection of 'recent fatals ' has mainly been VH registered aircraft ...

Stiffy and Ainsworth probably had a fair idea about the scale and quality control of the Rotax operation when they decided to build their own engine. How may of us would have had the balls to do what they did? Give them credit for their energy and enterprise- then lock the old bugger in a shed while younger heads negotiate a future for his company.

Welcome back!

DP it looks like you could be introducing a failure mode that was not there before. One day you'll land with a bit more boot on the rudder than you realise...and base over apex you'll go.

...I already know where these torsional movements and spacing's. are happening within the engine cycle and I think they are responsible for almost all of the problems associated with this engine incl.[ exept valves], fly wheel prop hub fasteners , comp. props ,c/case fretting ...

It's encouraging to see these posts.

As one who has been to the bottom and somehow survived, the worst damage is done when people turn away. The silence of cowards hurts as much as the covert actions of bullies.

Can anyone suggest a reliable CHT/EGT monitoring guage for my Jab? Just for my engine I have nine steam guages on my panel. The EGT and CHT have started giving dodgy readings so I'd better bite the bullet and get modern.

Maybe we need a thread just for suggested Jab engine improvements.

Michael Monck - thank you.The letter from RA-Aus by Michael shows that RA-Aus is trying to act as an appropriate agent within the recreational aviation industry -...

Looks like religion and politics aren't nearly as interesting as the Jab Engine debate; nearly 1,000 posts already!

...maybe one or two of us could come up with a solution to help Jabiru through this as quickly as possible.

There is a bolt on mechanical injector for experimentals, any ideas why this might not work too well

Some crazy training ideas developed out of the war. The Link Trainer was cheap but challenging.

Choice of fuel? Mogas vs avgasChoice of warm up prior to applying full power ( I know a guy who has had an engine failure who didn't know for three years that jabs should not have full power applied till engine temps were over 50 degrees. He used to take off at any temp over 15 degrees. ( the minimum operating temp)

Climb out speeds

 

Cruise settings - many opt for fuel economy but that runs engines hotter

 

Probably more

OK, Jab did recieve federal grant money at some time in the past...or low- interest loans

Surely Australia possesses the facilities and people needed to properly develop this engine?

If cost is the issue, there are so many funding programs and grants available for all sorts of unproductive projects, why can't some be allocated to saving and growing a unique Australian business?

Other countries must be laughing at the way we regularly throw money at old industries and ignore the new ones.

We've been here before, with even the great Barry Jones making excuses ("it just doesn't fit the guidelines") for not supporting promising new industries.

I flew one in the Korean war but I'm not sure if there are any more around. .Alan.

It took Australia a century to build a railway to Darwin; the Japanese built 500 km of dual bullet train track in about five years. We need more like the Wagners.

...CAE with SDS would be near perfect.

I got it straight away. Now you'll think I'm awful. Nev

. . . why did a company based in a country with wide open spaces design an aircraft with a cockpit only sufficient for bloody midgets ? ? . . . )Phil

Years ago I booked a week of lessons in a Gazelle. Having driven the whole family hours from home, I was finally going to learn to fly a powered plane.!

I didn't fit. Crestfallen, we drove all the way home in disgust.

I later found I could easily fit my 1930mm frame into an early model Jab. The later ones are even larger.

Has anyone researched the likely cost of repairs for possible Jab engine failures?

Those of us with low-time, but so far reliable engines might want to weigh up the certain cost of upgrades vs the possible costs of repairing failures. Detonation-induced thru-bolt? Exhaust valves. Flywheel studs?

How much cheaper is the upgrade than repairing a failure (assuming a safe out landing)?

...or maybe we should await the results of the current negotiations.

I would have thought water cooling the engine or cooling in general would have been the main number one issue that needs to be addressed before EFI systems?David

...everyone seems to have a "fix" for the Jab engine.

I'd like Nikasil bores, CAMit valve train etc, EFI and maybe even Rotec liquid-cooled heads.

Now for the airframe: a J170 taildragger adapted for STOL. Now that's an aeroplane for this continent.