Giants From Down Under

[excelpoint]

Loved all the pics and vid guys. you banana benders looked like you had a ball.

[notorious_benny]

Yeah mine locks in fantastic, I dont think it harriers as well as the 2.6 extra though. Even in the wind you can torque it the entire length of the field once it is in 'the zone'

[3W.]

	Quote: Originally Posted by 3W.
	PS maybe feed it some new shell 100 octane bird seed for a beter result be carfeul theres ethanol in it.

Quoting my own comedy whats the word on Shell Optimax Extreme 100 octane in our motors. Is there any problems using ethanol in them... Has BP 98 got ethanol in it..

Google "Ethanol is a by-product of Australian sugar cane and results in a reduction of overall greenhouse gas emissions" so its better for the pigeons enviroment what about the pigeons performance..

[rcdart]

	Quote: Originally Posted by Fly-guy
	LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS, LARCS. No sun like at TMAC either. Its nice and close to me LOL. A sunday if useful to me as well coz I work Saturdays

Marcus, I think I would be talking to the comittee before sticking your hand up to have us all decend apon your fine fields. At Lockyer Valley yesterday the members gave up the field for the day to allow us petrol heads to have our fun, a fact that was very much appreciated by all that attended, but not one that is always forth coming. NOT saying for one moment that other clubs would not do the same because they do, just that I appraoched my club before I invited all to attend.
In saying that, your enthusiasm and support is very much to be admired, and should it be organised to have a venue available, I am sure all fellow huckers will turn up to show off to the best of thier ability.

Mick

[notorious_benny]

I am of the understanding that high octane petrol dosnt give our low compression motors any performance advantage at all. I have rang and spoken too howie about this. In fact if you go too high in your octane rating you will just be getting an incomplete burn and the motor wont run as well.

When I rang Ian he said 98 premium is fine but wont give you any more power than 89 octane. I personally use caltex vortex purely for cleanliness reasons not octane reasons.

There was a big thread on this on the old site as well.

[excelpoint]

pigeon food for thought.

• First, when fuel is premixed with 2-stroke oil, the octane rating is reduced by about 2 points. An 87 octane fuel would therefore become 85 octane.
• Second, fuel evaporates and loses its octane rating when it lays in your aircraft's fuel tank or in a plastic jug. A "premium", 91 octane fuel will see its octane rating reduced to unusable levels after as little as three weeks. Fuel with a lower octane rating would obviously have an even shorter usable life.
• Certain fuels contain alcohols such as ethanol. These ingredients should be avoided since they absorb water which then creates corrosion inside a 2-stroke engine. They also have the effect of reducing the oil's lubricating properties. Rotax recommends avoiding fuels containing more than 5% alcohol
• To be avoided:
  • "Regular" fuel except if used with oil injection and burned entirely on the day of purchase;
  • "Premium" fuel which is more than 3 weeks old
  • Alcohol content of more than 5%

[3W.]

	Quote: Originally Posted by notorious_benny
	I am of the understanding that high octane petrol dosnt give our low compression motors any performance advantage at all. I have rang and spoken too howie about this. In fact if you go too high in your octane rating you will just be getting an incomplete burn and the motor wont run as well. When I rang Ian he said 98 premium is fine but wont give you any more power than 89 octane. I personally use caltex vortex purely for cleanliness reasons not octane reasons. There was a big thread on this on the old site as well.

Last year at albury its was a 35 degree day and marlin was flying his 100cc yak and glenno was flying his. Marlin had enough power to fly shedule but glenno didn't. The difference was 98 vs 89 octane. Glenno put 98 in his and seem to have enough power flying the same way. He recons there was more being the one flying it and it looked that way being a spectator to it all. This was a frigen hot day test which may not be as evident on cooler days. Dunno but this is what i saw hes fuel mighta been stale or had octane evaporate in hot bottle. Thinking about it he did have a big 10L bottle which was only 1/4 full. So is there a bladder bottle 10L you can buy thats static proof to keep fuel from loosing octane.

[excelpoint]

Higher octane usually will not give added performance unless the engine compression ratio is increased. With added compression you are able to compress the fuel closer to its self combustion level therefore giving a faster and harder burn with the result being an increase in horsepower.Not sure on the compression ratio in our engines but it would be intresting to find out.

[Fly-guy]

	Quote: Originally Posted by rcdart
	Marcus, I think I would be talking to the comittee before sticking your hand up to have us all decend apon your fine fields. At Lockyer Valley yesterday the members gave up the field for the day to allow us petrol heads to have our fun, a fact that was very much appreciated by all that attended, but not one that is always forth coming. NOT saying for one moment that other clubs would not do the same because they do, just that I appraoched my club before I invited all to attend. In saying that, your enthusiasm and support is very much to be admired, and should it be organised to have a venue available, I am sure all fellow huckers will turn up to show off to the best of thier ability. Mick

I dont actually fly at LARCS Just suggesting a field to fly at. I fly at TMAC, but due to the large number of flyers and very bad spot the sun puts itself in I can't really see it being a likely spot to borrow for a whole day. Guess we could try it if need be. I guess the next fly-in will be a while off so there is much discussion to be had.

I guess I just could get myself out to the Lockyer Valley

Anyway, it would be good to organise this sort of thing a few times a year if possible, looks like a good time, and then some, was had by all.

[notorious_benny]

Yep, high octane is used in high compression ratio engines. It prevents pre-detonation or 'pinging' the reason it prevents pinging is because its actually harder to ignite than lower octane. This is why methanol, which has a much higher octane rating than petrol dosnt go ka-blooey when u stick a match too it. Same with nitro-methane or diesel, they dont go super blooey but are both used in very high compression engines.

In my car I do get better economy and power with higher octane but that is becasue the EFI senses it and adjusts the fuel map and advances the spark for optimum performance.

Therefore, going back to my highschool chemistry, unless we ram more air in to the motor to go with the fuel and advance our spark we wont get a bigger bang.

I suppose the best way to see if there is any effect would be too run different fuels in the same motor on the same day. Maybe I should give it a go, but I dont have a tach!!!

[towball]

Spoke to the RAAF Base in Laverton 20 minutes out of Melbourne tonight. I am going to submit a request in writing to them for a two day IMAC competition in Mid to Late February 2006.

Will keep you informed...... as soon as I know. The commonwealth games could stop us having it there. If security are happy it will be a goer...

Just got back from indoor an trashed the reflection before I even flew....
O Rings had stretched and was doing a hover trim test in front of me and the O Rings let go. Wasnt a tail touch it was a tail destruction. Anyway a lot of glue and a bit of string to hold the prop on and I was back in the air.

Time to retire it... Next I am going back to a Shocky..


Towball

[notorious_benny]

That sounds like a great Idea towball!!! I would love to fly there.

I lost my QQ foam Yak within 3 days. I have a thunder tigre expo 3d now, its good fun!