206B3 fuel capacity
 

Hi,

Does anyone know the fuel capacity of the B3 with range extender fitted? I've been looking all over the manual and it says nothing! It also fails to mention the engine oil quantity, which I find a little disturbing. And while i'm on it, does anyone know the VNE for autorotation with standard floats?

Cheers

Look in the Rolls Royce book for Engine oil quantity. If there is a sight glass on the oil tank ignore it and use the dipstick on the lid of the oil tank. Maximum airspeed is 87 knots for autos with skids. This is in the flight manual supplement.
Range extender? Is this a Bell STC?

91 US Gallons

96.7 USG with Range extender on BII.

91 USG on BIII ( I dont think a Range extender is avaialable for BIII with 91 gallon tank??).

Depends what year it was built. The standard tank was designed for 75 gal, and that's all the gauge shows.

Then the extender was fitted (it will be a Supplement to the manual, fitted after construction) and the gauge will often still only show 75 gal - wait till you have flown for 50 mins or so and it starts to register.

Or, get a new gauge which shows fuel to 91 gal.

Machines built after about 1998 have the filler cap moved up the fuselage a bit, so the tank will hold the lot without the exterior add-on, and the gauge goes to 91 gal.

We have a B3 with the fuel tank hole moved up a bit. 91 us gallons usable, 92.6 total (with unusable)

The BIII production up to serial no 35xx (can't remember where I read this) was the old 75G tank (suitable for the extender), after that the 91G tank was fitted, along with a few other minor 'upgrades' .

From memory the later model B3 with the high fill point didn't quite hold as much as a low fill with range extender fitted. The low fill held 288 litres and with range extender fitted it went up to 366 Litres. The high fill was slightly less at somewhere in the 350's.

We have one with 96.7 USG (year of production early -80st, small pipe outside). Another (1990.) is 91 USG.

JR

Does One not have a RFM with the appropriate Supplements?

It´s 5.5 quarts or 5.2ltr ;)

Are you converting to turbines from Piston? It´s normally not a issue on turbines how much oil they hold, they usually don´t burn any or veryvery little needs to be added.

BIII s/n 3562 and subsequent have the 91USG tank and I´m pretty sure a range extender cannot be fitted. It would be pretty useless anyway since you could only get some 5.0 USG more into the tank.

From the 206B3 RFM:


Maximum airspeed for steady stateautorotation -100 mph {87 knots).

That's because it isn't a Bell part. Look in the Flight Manual supplement: it comes from the range extender manufacturer via an STC and is 96.7usg.

Background to the range extender was Bell's production of the original 206 with a substantial air space in the tank which couldn't be used for fuel as the filler was too low, limiting the fill to ~70usg. When the first range extender by Aeronautical Accessories was produced Bell were Not Impressed, claiming that putting more fuel into the tank would become an issue in the event of an accident or claim since the tank wasn't stressed for a full fill.

Now Bell produce the 206 with a higher fill cap and everyone's happy, which makes one wonder about the hysteria back 30-40 years ago :hmm:

Nothing disturbing in that, but the quantity will usually be in the Maintenance Manual: 5 litres springs to mind.

Look in the BHT-206B3-FMS-8 for all stuff to do with fixed floats. Page 4, Engine Failure - maximum speed for steady state autorotation - 100mph (87 knots).

Is the extender a bladder?


Mickjoebill

It's just an external pipe with a 90 degree bend attached to the filling point and extending up a few inches, allowing you to fill further than if you'd been pumping straight into the original fill hole. The fuel cap sits horizontally on top of the bendy pipe.

What AOTW says:

http://www.aero-access.com/images/Be...f8597834fa83a4

600 quid for an L-bend. Gotta love the aircraft industry!

And before anyone asks, the perpex panel on the front enables a pilot to look back over his/her shoulder and make a visual inspection of the amount of fuel in the extender and therefore the amount beyond the 75 gal.
In flight.
Yeah right.....

CY,

To be fair, it does actually work that way ;)

And the new price from AA is about $US1600 :hmm: