Solo student pilot in Cessna crash at Parafield walks away. 05/01/26

[skippydiesel]

1 minute ago, BrendAn said:

i learn't today that rotax do make airboxs, i always thought that sort of stuff was made to suit .

You are not entirely wrong - many airboxes are made by the aircraft factory, as are mufflers and engine mounting systems, however Rotax make all of these items as well. 😈

 

[facthunter]

Anyhow you are Losing POWER and May have other Problems IF you heat it all the time. I must have EXPLAINED  THAT at Least 4 times. Its Pretty basic stuff.. I don't CARE who made the airbox It's irrelevant,  It's a bad idea. to have HOT air all the time .  Cars etc run better in cool air as it's MORE dense.  Nev

Edited 10 hours ago by facthunter

[Moneybox]

1 minute ago, skippydiesel said:

You are not entirely wrong - many airboxes are made by the aircraft factory, as are mufflers and engine mounting systems, however Rotax make all of these items as well. 😈

 

You can bet these components are made to a predetermined Rotax specification or at least approved by Rotax.

[Moneybox]

2 minutes ago, facthunter said:

Anyhow you are Losing POWER and May have other Problems IF you heat it all the time. I must have EXPLAINED  THAT at Least 4 times. Its Pretty basic stuff.. I don't CARE who made the airbox It's irrelevant, It's a bad idea.   Nev

Nev, it's not new. If you look back a few years at automotive engines running carburettors, later versions used water heated manifolds due to the problem created by evaporation of the fuel causing cooling.

[skippydiesel]

11 minutes ago, Moneybox said:

You can bet these components are made to a predetermined Rotax specification or at least approved by Rotax.

I cant be certain but I think you are incorrect.

Rotax will supply a basic 912 ULS engine, for which you can including exhaust , air inlet/management , remote oil tank, coolant & oil heat exchangers at a price($$$$?). What you or the factory do with the component's is the choice of the purchaser.

Rotax do not supply, for the 912 carburettor engines, fuel reticulation components other than the fuel distribution manifold .

Factory's often opt for locally or inhouse, made  components - oil/coolant heat exchangers, custom exhaust system & engine mounts, probably due to cost savings and possibly cowling dimensions.

I have seen some really weird looking exhaust systems, that are unlikly to follow Rotax standard's.

The exhaust system on your Evector being a case in point.

😈

Edited 9 hours ago by skippydiesel

[facthunter]

I'm eFing wasting my time. You haven't listened to a word, Getting away with it doesn't mean it's the Best . There are Laid down figures to Meet, Turbo'd and Injected Models should be OK and there's Plenty of Heat/ Vaporisation issues with that fuel system and carb type/Location already. Nev

[BrendAn]

24 minutes ago, facthunter said:

I'm eFing wasting my time. You haven't listened to a word, Getting away with it doesn't mean it's the Best . There are Laid down figures to Meet, Turbo'd and Injected Models should be OK and there's Plenty of Heat/ Vaporisation issues with that fuel system and carb type/Location already. Nev

there are a lot of cowled 912s running cone air filters straight on the carbs with no issues at all.  

 

i don't think anyone is saying your wrong but  all the engines out there having no issues makes it hard to argue.

 

Edited 9 hours ago by BrendAn

[facthunter]

You haven't taken aboard all the Points I Made either. It's Less efficient and Harder on the engine. You go for efficiency in other areas. Why NOT this one? Is it Because I Brought it up?  Nev

[Moneybox]

20 minutes ago, facthunter said:

You haven't taken aboard all the Points I Made either. It's Less efficient and Harder on the engine. You go for efficiency in other areas. Why NOT this one? Is it Because I Brought it up?  Nev

Nev I think most would understand that cool air is more dense therefore you can squeeze more into a confined space but we're talking about carburettor icing, something that Rotax seem to have less of a problem with than other engines in similar service. It has nothing to do with the fact that you brought it up even if you did appear a little rude in the manner you did so.

 

What I'm suggesting is that Rotax may be utilising available heat to help prevent carburettor icing. If heat transfer from the airbox is the answer you'd get less heat at higher revs due to the more rapid airflow. Therefore performance at higher engine speed would be less affected. Once you reduce throttle and therefore airflow through the airbox incoming air temperature would rise effectively combatting carburettor icing.

[BrendAn]

1 hour ago, facthunter said:

You haven't taken aboard all the Points I Made either. It's Less efficient and Harder on the engine. You go for efficiency in other areas. Why NOT this one? Is it Because I Brought it up?  Nev

It doesn't effect me. I don't have a 912 but I do know people that run them  like that with no issues.

But maybe there cowls get lots of airflow so temp is not much more than ambient.

[facthunter]

Moneybox, Don't Worry Mate.  I think WE are Just different. I'm a Bit fanatical about how engines are running and cared for. AS an example I  would not have driven your van across the Nullabor without changing the Oils  and filter in case the sludge got stirred up, as can happen and wreck the Motor . Vans are often driven by anyone who generally doesn't give a stuff about them and My Mechanic mates tell of Operators WHO  don't Service Vehicles, Councils, Taxi owners Vans etc to save Money

 . ALSO some fool mucking around with the Airbox Of a Plane I flew made it use 23 Litres/hr instead of the Usual 16 Liters which it had Previously operated at. I thought it had developed a Fuel Leak. I'm just Not as trusting as you are from experience in engine recondition and seeing the effect of neglect  and Bad work and design on  things and also on Planes Putting MY life at risk. Some Participants Have a rather cavalier Attitude to Maintenance and I don't Like it. Maybe that's why I've NEVER Hurt anyone or Damaged a Plane. "She'll Be right" Is NOT ME. Never will Be.  It's an aeroplane  Not a Game. and I've had plenty of associates kill them selves or get  seriously injured Predictably. Nev

Edited 8 hours ago by facthunter

[onetrack]

2 hours ago, Moneybox said:

Nev, it's not new. If you look back a few years at automotive engines running carburettors, later versions used water heated manifolds due to the problem created by evaporation of the fuel causing cooling.

The reason Holden used a water heated intake manifold on the red motors was to produce smoother cold weather idling and running, and better fuel atomisation. The warm manifold prevented liquid petrol from pooling in the intake manifold below the carburettor.

 

Edited 7 hours ago by onetrack

[Moneybox]

No doubt we're polar opposites. I'm a little casual however I operate on prior knowledge. I didn't spend a lifetime in mechanical engineering without picking up a few clues along the way. As I said before heading to Melbourne "If it starts and runs without overheating it'll make it across the Nullarbor". That doesn't mean I don't take care, I just know what I'm doing in most situations. If the vehicle was to hiccup along the way I have what it takes to sort it out so I take on things that some may find risky, for me it's a calculated risk.

 

I'm yet to learn aviation and I'm quite aware that I'm in the high risk category where the casual approach can bring somebody to an untimely end however I've passed the last 72 years without a vehicle accident (non-competition) or serious injury so I think I have a fair chance of getting it sorted.