Thruster88

On the rotax 912iS and 915iS engines i have seen at work the above twin pumps are inside a rotax stainless enclosure, i thought this was supplied with the engine and you were asking about hose between the pumps and engine?.

I guess this is for the 916iS. Automotive AN from a reputable supplier should be fine. The most important part is that the hose and end connectors are compatible and rated for the pressure. Seek advice if you have not if you have not used that type of hose and connector before. Do as the rotax install manual says.

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Rotax 916, awesome engine.

Using the calculator. If we run our Rotax 912 powered LSA @ 50% power(low power), ie 37kw to the propeller for 1 hour we will need an 80kg battery to do this in the electric version. 80kg is more than the max fuel wieght of most LSA aircraft. Only 1 hour no reserve. LSA aircraft typically only carry 10% of their MTOW in fuel, for jets this is much much higher. 500wh per kg battery will not make commercial aircraft burning jet A viable.

Perhaps a systems approach rather than treating the symptoms, cold feet. In a sustained 1°C dressing appropriately will keep the core temp up and blood will flow to the feet. If you get a little hot even the body will use feet as a blood cooler. Not a doctor so this may be complete bs. How Cold Weather Affects Blood Flow | The Vascular Care Group THEVASCULARCAREGROUP.COM Cold weather can affect circulation, leading to health issues. Learn how to protect your vascular health in winter with tips from the experts at The Vascular Care Group.

For the thruster I use a freezer suit, very effective. Snow ski pants would be OK in an enclosed aircraft.

Red, do you have any explanation for the fuel pressure behaviour in skippys aircraft? In the tecnam i flew yesterday there was less than 0.2 psi change when turning off or on the electric boost pump, on the ground at idle or flying at full power.

So the fuel pressure in skippys aircraft is dropping from normal 4-5 psi to about 1 psi when the boost pump is turned off and slowly rises over a minute or two back to a normal level of 4-5 psi. Skippy tells me his boost pump pressure is a little higher than the engine pump pressure so the boost pump could force the diaphragm down in the engine pump and It would stop stroking. A blockage of the vent could keep the diaphragm down with minimal stroking which gradually increases as pressure bleds back into the vented section of the engine pump.

The jet or turbine powered car dream is alive and well.

I have had the carburetors flood out the vents tubes a few times on the thruster 582 while at low idle on a down hill taxi. My electric fuel pump pressure is a little high and am changing the pump to a facet FEP42SV, 1.5 to 4psi. Other reasons for flooding, carbs shaking at low idle and or heavy floats.

Find flight data recorders on june 13 and 16, fly them to Delhi on June 24 for investigation. Seems like an unnecessary delay.

Brendan, the POH for my 1963 Beechcraft 23 always calls the electric fuel pump the boost pump. It does this in the normal and the emergency sections of the manual. In the event of engine failure BOOST PUMP ON and change tank is first in the list. The engine pump can supply enough fuel pressure at all times unless there is a mechanical pump failure, vapour lock, partial blockage or air in the system due to a dry tank selected, the BOOST pump can over come these issues. I will continue to call the secondary, electric, backup, other pump the BOOST pump in any aircraft I fly. Unless it is an iS rotax, then it is pump A and pump B.

Regarding your posts that the carburetor engine still receives adequate flow even at low fuel pressure, I TOTALLY AGREE, however to say the fuel pressure gauge is in error sometimes makes no sense. How can it be in error sometimes? Is your fuel pressure on the ground, Boost pump only the same as while flying, engine pump only? In a tecnam /912 I have been flying lately they are the same. Turning off the boost pump in flight results in zero change in fuel pressure on the mechanical fuel pressure gauge. Below is a 912 fuel pump. A blockage in the vent line might explain your pressure rising over a minute or two. The little spring controls fuel pressure and should immediately take over from the boost pump unless perhaps the diaphragm is being held down and not able to stroke.

When aircraft hit the ground hard like this one has they often bounce back into the air and make a second hit some 10-20 metres away. It looks to have flipped over as well.