bexrbetter

I wonder if the tongue depressors got put to their use ....

 

 

Jab engines are quite well made and stout down low and I give them credit for that but the heads are a truly bloody awful design, every aspect of them - hmm, reminds me of a few old girlfriends actually.

 

After having a good look at the heads last yearI figure there might be a small market for something a lot better. The water cooling is an option but I can see why some wouldn't want to go that route and would simply prefer a better air cooled version.

 

A run down;

 

Change the shape of the exhaust port to a much more efficient shape allowing better flow not only decreasing temps but increasing horsepower at the same time.

 

Change the shape of the inlet port to a more efficient shape allowing better flow increasing horsepower.

 

Maybe increase valve size although flow numbers need to be determined first.

 

Add more squish in the chamber around the exhaust valve area while opening up around the inlet valve to equalise chamber temps better.

 

(The above will allow less throttle to be used for the same horsepower at cruise also reducing temps along with more take-off power at the same throttle as before).

 

But most of all a total redesign of the finning arrangement now on it's 4th iteration is needed. While it would seem logical to do the large fine finning as they have done, it actually isn't, there is a much better and well proven way to do it. I guess having grown up and done my apprenticeship on air cooled engines and performance modifications on them during the 70's and 80's gives me a bit more insight and I'm not Robinson Crusoe there, plenty of others around with the same knowledge that Jab could have asked but obviously didn't.

 

If you want I can set you up for the first 3 and optionally 4 items on the list locally, results 100% assured but not the finning of course. Very little outlay compared to the WC heads too.

 

Otherwise at this time I just want opinions if I made a batch of 100 heads would they sell? How much is a new Jab head out of interest?

 

By the way, for your cooling shrouds, I suggest you might try decreasing the mouth opening size and test which way the temps go, sometimes if the opening is too big you can actually get flow stagnation or even reversal - just something to try, it may be worse.

 

 

Ok, I win.

Jeff, can a run a poll by you?

 

If you could buy air cooled heads that ran cooler yet gave more power is that a viable option for you and how popular do you think a product like that would be?

 

What would you expect the cost to be?

 

 

now there's a name you can trust......"G'day mate. I'm looking for Sum Yung Guy..."

Took long enough for someone to notice my addition

 

 

Does this mean the bull would be around for hefer and hefer?

 

 

3 days ago the Premier of China flew into Chengdu to officially hand over the first ever Chinese LSA certification to the first ever Chinese LSA airplane. No I don't, but I'm looking - is the answer to the obvious.

 

I did find some other info....

 

September 29, following the successful maiden flight in the middle of this month, AVIC Shenyang Aircraft Corporation, produced China's first aircraft the L162 light sport aircraft in Shenyang and started delivers to customers. The aircraft initially priced at about $ 110,000, will mainly be exported to the North American market and is expected to be put into mass production capable of a maximum annual output of 1000 planes.

 

According to reports, L162 aircraft suitable for flight training, private flying and sports, has a length of about 6.95 meters, weighing about 600 kg, mainly aviation aluminum alloy, capacity for 2 people. Cruising altitude of 1800 meters, cruising speed of 207 kilometers and a range of 722 km. Shen Fei Group says the mass production of the aircraft will within two years reach the annual output of 750 with annual sales exceeding $ 82.5 million. The market survey shows a North American market of 1000-1200 being the annual demand of the aircraft and already more than 1,000 customers waiting delivery. (Reporter Sum Yung Guy)

 

Oh and as for Chinese quality, Chengdu makes the complete 787 tail assembly as well as lots of other Boeing stuff, have for years and a couple of British drinking mates make Roll Royce's inconel fuel line parts also in Chengdu. The list in my city is even longer from Cummins and Eaton to also Rolls Royce and Boeing. My city is also one of the world's biggest producers of water and steam turbines and 1 megawatt wind turbines.

 

 

So, think yourself lucky if you only get flamed on here because it could be a lot worse. I .

Sheez, it's only a computer screen with words on it, it's not life, turn the bloody thing off if it stresses you that much!

 

 

Watt a shocking subject.

 

 

I used to ask the question is it the British weather that causes British people to be like they are or is it the British people that causes the British weather to be like it is?

 

 

...By your own admission you said:I popped into Supercheap and bought a 4" grinder for $19.99 (over 10 years ago) and it lasted 3 hours

Yes I did, but I didn't whine about it later, that's the difference and that was my point. But anyway, you're right, this is one of the best run forums on the net, not just aircraft specific and I admit to a certain carry over from car forums where the ignorance level can be quite extreme along with my retorts so my apologies to the forum and I will attempt to defer from answering in the negative, thanks

 

 

You must live in an interesting part of China. Other Chinese people I know say they don't see any private aircraft and the only ones they are aware of is that of the rich and famous like Jackie Chan.

You did note I said ultralights? But yes, plenty of them around mostly the parachute trike fan things, some hanglider trike fan things, the odd Drifter style and the odd gyrocopter. 2 or 3 parachute trikes fly back and forth over most weekends over the actual city with advertising slogans. Then there's the Cessna 172's constantly doing their loops from the University but I've already mentioned those, I do have pictures, will upload them one day. There's also a small twin engined thing goes across my house low twice a day and lands at the Uni, obviously a scheduled flight of some sort.

 

There are no light aircraft around, I think that's well established and clear to most in this thread that a main theme is the forthcoming opening up of airspace to light aircraft. A light aircraft to me is Zenith 750, Lightwing Sport 2000, AAK Hornet etc 2 seater sized planes, sorry if my terminology is incorrect.

 

At least Jabiru have local customers to test run their engines for them..

Not the right time or thread to reply to this, give me a couple of weeks, I have a plan ....

 

(Mods, the smileys need a mad scientist!).

 

 

I have had the pleasure/displeasure of having equipment built in China, most of the oil patch went to China in the early 2000's because of the price now most of the majors ask in their RFQ's not to made in China.

So the analogy is you went to Supercheap, bought cheap crap and it's somebody else fault.

 

That you're not capable of doing business in another country doesn't make it the countries fault, the arrogance of many Westerners who come here and are "going to show them how it's done" and I have been told those exact words, is wonderfully balanced by how many go home with their tails between their legs.

 

Very pleased to mention the numbers of people I have helped here not get burnt but of course they were first capable of admitting that they just might not be experts in another culture. I have never taken a cent for helping either, oh what a Saint I am

 

Take it however you like, but I won't be buying an aircraft or engine from China in the near or far future.

Oh the irony, you already have

 

Now don't get all defensive,

Not at all

 

 

Most of you guys think Jabiru engines are unreliable, wait until you get an engine made in China,

It's a credit to this forum that it took so long before the predictable person came along, in car forums it happens within 2 or 3 posts.

 

I would be very wary of inexpensive Chinese aircraft engines & parts.

I take that offensively so I suggest you go visit a taxidermist.

 

 

This will be the interesting thing to look out for. As it stands the Chinese are bloody awful for allowing the slightest deviation from prescribed routes. With their extremely tight grip on airspace and their ideological intransigence

And yet Ultralights are buzzing around the place all the time and they have a park for them nearby, the bottom line is there are no light plane groups yet asking for what they require, good and fair balances will be reached, they always are. just early days yet.

 

I don't think I'll be booking any recreational aviation trips to China in the near (or far) future.

Well nothing is clear or decided at the moment and you would certainly be missing out.

 

 

The other a pilot. Cashed right up.Offered to pay my way to china.(didn't get to talk return air fares). I declined the offer.

You're safe, they would have flown you over, gotten as much info out of you as they can, looked after you very well and flown you back, deeply ingrained into their culture to be responsible for your well being and safety and they take it very seriously. Ironically they will also stab you in the back doing business with you in every unethical (to us) possible way they can.

 

Social attitudes and business attitudes are diametrically opposed here.

 

They apparently bought the manufacturing rights to produce the a/c in china.

Are you obliged to not tell us?

 

 

could this be used for time travel?

Well looking at your post apparently you already did

 

 

If some Chinese business people choose to put up the cash I'm sure good engineering design work, metallurgy etc can be procured.

I kind of read that as a suggestion that "good engineering and design work, metallurgy etc" isn't already the standard here, you would be wrong.

 

There's a big difference between what you buy at Supercheap and what Chinese buy at their equivalent Supercheap, Chinese people generally aren't stupid enough or tight ass'ed enough to buy the crap some of you guys are willing to and what's more, you keep buying it over and over and then comment it's a whole countries fault for your own poor decision.

 

I popped into Supercheap and bought a 4" grinder for $19.99 (over 10 years ago) and it lasted 3 hours, just long enough to do what I had to do and was as happy as a pig in poo. No complaints about another country, it was my decision to buy a piece of crap and I got exactly what I paid for.

 

Moral; Stop buying crap, it's that simple. Or if you do, some proper allocation of responsibility please.

 

So if the Chinese are getting ready to manufacture aircraft engines suitable for ultralights and LSA's etc does it follow that in a few years time we could have low cost new technology engines that can be affordably replaced at the end of their lifespan a bit like how the consumer products i.e. flat screen tv's etc we all have at home have gone?

That's my plan Stan but try one year.

 

I wonder how rotax will respond?

Like many others in history, first they'll do the "trust" campaign, then they'll make their own in India (cause that's cheaper than China) and hypocritically stay with the "trust" program.

 

 

Kyle if your boy fair dinkum lobs to Chengdu for a sqizz I'll giv'em a hand being a banana bender, giz a yell when he puts a knot in the bluey and I'll put the billy on but larrikins welcome freckle punchers not so. - How you going there Phil with your "Australian", keeping up?

 

 

Which Chinese Phil, there's a few different dialects.I was in Beijing with a colleague who speaks native Cantonese and the had some difficulty .....

 

I am right.....my son works in China teaching english in a school just north of Shanghai...I have my own personal translator...he can speak both dialects one better than the other though but passable.

Yes there are about 70 languages and of course Mandarine (taught in all schools) and Cantonese down South are the main 2. Then there's all the small village variations of the 70 odd. It's bizzare watching my wife who is fluent in Mandarine, although she grew up with Sichuan Province language, trying to speak to another Chinese person in a different part of China. She can not understand Cantonese at all but they can understand some of what she says because they all learn it in school and watch it on TV. She can speak about 5 Chinese languages.

 

Kyle, Shanghai language is unique in all of China that it has no crossover with any other, it is unique to itself and no other Chinese person can understand a word of what a Shanhai'ese is saying! - of course they speak fluent Mandarine as well there so no problem.

 

Phil, it's quite hard to start, the 5 tones certainly don't help, and then makes more sense when you can get some sentence structures together. Because of all the slight language variations they need a complete sentence from you to confirm what you are saying rather than simple words we tend to use. Anyone who has been here has noticed how long a conversation takes, mostly they are repeating what the other person has just said and checking that's what they actually said posed as a question and it's this constant confirmation that seems to take forever.

 

But there's more to it than just language, you importantly need to understand behavioural cultures and after 10 years I'm still just scraping the surface and watch amusingly as new Westerners here struggle with that regardless of how well they speak the language. In their arrogance they forget who's sandbox they are playing in so it's much better here to be quiet and look like an idiot rather than opening your mouth and proving you are one.

 

 

I thought this might be of more interest in the General forum rather than the DMotor thread ....

 

Don't know if any of you have seen bexrbetter in disguise lately, but seriously, I was told by someone on a stand at the 2012 Oshkosh that Chinese business characters were going round trying to buy various items for cash on the spot - even complete engines. I imagine a bit of reverse engineering was planned using ultra high high quality Fosters tinnies?

And they are flying all over the world visiting air shows and minor to major aircraft manufacturers looking at how they can get into the Chinese market that's opening up right now. I've knocked back a few offers along with making a few myself. The money that's being bandied around is obscene. We are all waiting for the regulations to be put in place but it's guaranteed that "Skyroads", as my friends call them, will be opened to the public very soon.

 

I'm getting in early and with a superior bespoke engine designed for aircraft, I'm not a glorified VW engine fan and airframes are coming to make use of them.

 

With what I know of here already the world of aviation is going to be rocked over the next 5 years, my 1/4 price engines are just the beginning (I believe I will be one of the first out of the box).

 

One of those things I know is a city 10 minutes away from me has put in massive infrastructure to to develop and support a local Aviation industrial estate. They are making the Professors and Masters and resources of the University available free of charge and have built a vocational school to train workers to build and service planes etc, etc.

 

Guanghan; http://en.wikipedia.org/wiki/Guanghan you can see the National University of Aviation http://en.wikipedia.org/wiki/Civil_Aviation_Flight_University_of_China a few kilometers to the South East and obviously the massive runway. I live in both Chengdu but primarily Deyang, 10 kms North East of Guanghan.

 

 

So will we be able to copy the Chinese version and make it less reliable? (just kidding..)

We only select the finest Coke cans to melt down and make the pistons from I'll have you know!

 

 

I'm actually really interested in this engine now... sure seems more logical than a souped-up Briggs or a re-engineered VW to my mind anyway.

I suggest you wait a few weeks then I'll show you something else to get excited about.

 

I am sitting here right now redoing some prior art for the 3rd time so the stupid Chinese patent company obviously can see what is non-obvious, which is obviously obvious to me obviously, but not obviously obvious to them obviously - obviously.

 

 

Is it turbocharged?

 

 

What is the red car-like looking thing, some sort of flying car?

That's the Lightwing electric car.