How much flying time can i get on a single tank of fuel on a avistar? just learning and putt putting around the sky?

Depends on the fuel tank size and engine size. Rule of thumb is that you want to set your timer for 10 minutes of air time and then you throttle down to land. You also want a few minutes extra in case the wind whips up and you have to go around a time or 2. To achieve this with a 40 size engine you should have an 8 oz. tank. For a 46 size engine, use a 10 oz. tank. In you have a tank and not sure what size it is, fill it to the top with water and pour it into a measuring cup. Just be sure it has time to dry out before installing in the plane. H20 and fuel don't mix very well.

I agree with fastsky. Another factor is throttle managment. If you fly with less power applied, your flight time will get a little longer. Good Luck, Dave

20 to 25 minute flight times are achievable if you fly around slowly at a few clicks above idle.

Stock Avistar Tank..

OS FP40 10x7 prop I got 15 minutes 3/4 to full throttle

OS FX 46 10x7 prop 10 minutes 3/4 to full throttle

BORING!!! The Avistar is a very capable aerobatic trainer. I doubt anyone would fly it at just above idle unless they were on final aproach.

I have had my avistar with a .40 LA and a 11*5 and I will fill the tank and look at my fuel tank and the level drop two inches and fly 4 flights of 10 to 15 minutes. but I do refuel after flight. and when I infill it will only be down about an inch. so that 40 is very efficient and i haven't tried but I say I could have a 30 minute flight and land fine

An Avistar is not a large plane.

With a ball bearing 46 at full throttle, it would be hauling the freight?

Unless there was a need for speed I doubt a person keeping it full throttle the whole flight?

The the FP 40 it was a good trainer that gould still get out of it's own way.
Going from a sleeve bearing 40 to a BB .46 is a real wakeup call for an Avistar.

It's not going to hover but it'll get up and go fast.
My Avistar would do about anything I threw at it after I moved the CG back a little.

A Supertigre 40 with an avistar 10 oz tank, easy 20 minute flight.

Mine has an OS .40 LA and the stock tank, and a 12 minute flight of half lazy circles (low throttle) and half aerobatics (high throttle) uses about half a tank. I imagine a 20 minute flight would be easy with good throttle management.



J

so i should practice about oh 15-17 minutes of flight time on my simulator. I am trying to get a feel for how long i should be up in the air.

thanks again

Limiting yourself to a 10 minute maximum is pretty much the rule at most fields - especially if there are other fliers waiting behind you.

I've been up the field on a few occasions where I was the only one there. I'd fly for 10-12 minutes, land, refuel, check the RX pack and fly again right away. Wound up putting up 10 total flights for about 90 minutes of air time. I still had battery and fuel left but I was getting tired and pretty hungry. Decided to call it a day.

After about 10 minutes in the air, I am usually ready to land and take a break anyway. Don't sweat it if your tank only lasts about 10-15 minutes. Flying style and needle setting make a big difference in fuel consumption. Four stroke engines in particular can get really thirsty if the low speed needle is too rich.

The concentration level required to fly RC planes is much higher than learning a lot of other things because of how fast things can go wrong. Lets face it, if you turn the wrong direction at the wrong time and don't correct it within a few seconds, it may be too late to save your plane!! If you do this, your instructor has to react twice as fast to get things under control again. If you don't need a break after 10 minutes, theres at least a good chance that your instructor will neeed one!! Onr other thing, always break a large brim hat with you. You don't want to be losing sight of your plane from the glare of the sun.[8D]