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Fuel Tank Capacity

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john.greenhalgh1(at)sky.c
Guest

Posted: Fri May 06, 2011 1:40 pm Post subject: Fuel Tank Capacity

I'm in the process of calibrating my fuel tank and would like to know

what the reserve tank capacity and the overall tank capacity including

the reserve.



Any information would be much appreciated.



Regards John

terrys(at)cisco.com
Guest

Posted: Fri May 06, 2011 2:10 pm Post subject: Fuel Tank Capacity

Hi John,



In our monowheel XS the tank holds 18.5 gallons with the fuel a few

inches from the top of the filler neck.  The tank splits at the tunnel

at about 5 gallons, with 2.5 in the reserve side.



Regards,

Terry

--

ward.t(at)xtra.co.nz
Guest

Posted: Fri May 06, 2011 2:13 pm Post subject: Fuel Tank Capacity

John,

I have a total capacity 65.5 litres, 18 litres is the total amount in the 

two compartments either side of the saddles, which means

9 litres reserve. There is a further 2 litres up the fuel intake corbra etc.

Tim



Tim Ward,

12 Waiwetu Street,

Fendalton,

Christchurch 8052

New Zealand



Ph; 03 3515166

Mob; 0210640221



email; ward.t(at)xtra.co.nz

--

ptag.dev(at)tiscali.co.uk
Guest

Posted: Sat May 07, 2011 12:03 am Post subject: Fuel Tank Capacity

Hi! Tim

I have to question your statement that the "two tank bottoms either side of

the saddle totalling 18 litres" means 9 litres in the reserve. It is my

belief that the starboard side is the smaller of the two sides so only an

actual measure will provide the correct reserve amount? Either way it is

best not assumed but remove any doubt by doing a measure.

Regards

Bob Harrison G-PTAG 



--

graeme bird

Joined: 15 Jul 2010
Posts: 434

Posted: Sat May 07, 2011 11:25 pm Post subject: Re: Fuel Tank Capacity

I have just filled and calibrated my tank for the first time and I set the single electronic gauge at full when I had filled 65 ltrs. I also have a sight gauge off each side but I have to say the levels were not that convincing. I filled 5 ltrs at a time. I then pumped/syphoned most of it out after doing the electric pump flow test (it just continues to flow once started). The electric gauge seemed right but again the sight tubes weren't that convincing.

I expected the starboard reserve to fill first, which it did.

_________________
Graeme Bird
kit4 (Wagstaff) TBD
Kit3 G-CLXU (Gregory) mono 914 xs Woodcomp
Kit2 G-PATS - (kesterton) Mono Classic 912 warpdrive
Kit 1 G-UMPY - Mono Classic/XS 912S, Woodcomp G(@)gdbmk.co.uk

ward.t(at)xtra.co.nz
Guest

Posted: Sun May 08, 2011 9:13 am Post subject: Fuel Tank Capacity

Bob,

You may well be right. I do remember shutting off the starboard out and 

draining the tank through the

port outlet leaving 9 litres left in the starboard compartment as a reserve.

Cheers,



Tim



Tim Ward,

12 Waiwetu Street,

Fendalton,

Christchurch 8052

New Zealand



Ph; 03 3515166

Mob; 0210640221



email; ward.t(at)xtra.co.nz

--

Ivor Phillips

Joined: 16 Jan 2006
Posts: 253
Location: London UK

Posted: Sun May 08, 2011 10:45 am Post subject: Fuel Tank Capacity

Graeme

 

I have found my sight tube to be next to useless when airborne but works well when filling on on the ground ( Tri Gear)  I filled mine at 1 Litre at a time and marked the tube

in 5 litre's increments, the fuel gauge (avelec) in my case is very accurate but i prefer

 Fuel flow used to  give me reassurance when running low on the main tank.

 

regards

Ivor

G-IVER

On 8 May 2011 08:25, graeme bird <graeme(at)gdbmk.co.uk (graeme(at)gdbmk.co.uk)> wrote:

 [quote]--> Europa-List message posted by: "graeme bird" <graeme(at)gdbmk.co.uk (graeme(at)gdbmk.co.uk)>

  

 I have just filled and calibrated my tank for the first time and I set the single electronic gauge at full when I had filled 65 ltrs. I also have a sight gauge off each side but I have to say the levels were not that convincing. I filled 5 ltrs at a time. I then pumped/syphoned most of it out after doing the electric pump flow test (it just continues to flow once started). The electric gauge seemed right but again the sight tubes weren't that convincing.

  I expected the starboard reserve to fill first, which it did.

 

 --------

 Graeme Bird

 G-UMPY

 Mono Classic/XS FWFD 912ULS/Warp drive FP

 Build nearing completion

 

 

 

 

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 [b]

budyerly(at)msn.com
Guest

Posted: Sun May 08, 2011 7:44 pm Post subject: Fuel Tank Capacity

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->                        [img]cid:00a101cc0dfa$02C34B75(at)adminPC[/img][img]cid:00a201cc0dfa$02C34B75(at)adminPC[/img] Photo E-mail           [url=http://photos.msn.com/Viewing/Album.aspx?PST=8nK2AN1B!1LEiKSdooxx9v4CFFiF2tnPzfqiCRx5lZJb1PK8cJ43U178Cj9K5v0dBOyRUP8ehqN5EQNFDiaRvA%24%24]Play        slideshow[/url] | [url=http://photos.msn.com/viewing/Photos.aspx?pi_Type=SlideshowTask&Task=Download&stppData=&pi_ImagesOnly=1&Folder=nBuRgwTGIGjZPMtNhxCyPhYLUBR*bYP2uzFIOVTpF0g%24&User=23IQaj7Z2BRqNO1wUECSpX*P0Ju9hSGI&pi_NoLogin=1]Download        images [/url]   Ivor and all,

  

 The original Classic tank in N139AB held 2.5 gallons in each saddle.   The tank itself when filled up to the upper level of the boss (fuel inlet with  that horrible old hose) which means a slight amount of fuel in the filler tube,  held 18 gallons.

  

 The XS 2000-2004 with the horrible depression in the top of the tank also  held 18 gallons.

  

 Keep in mind, the tail dragger will hold less because of the trapped air in  the front of the tank, unless there is some shacking and tail lifting  involved.

  

 The last set of tanks made with the diagonal reinforcement molded in the  back (thanks to Roger and John), have a very flat top and is  wider by some 1/2 inch or so.  On replacing the original tank in N12AY  (which cracked) with this new tank, my capacities are the same on the reserve  side and main at 2.5 gallons each.  The total capacity of the tank in the  tri gear N12AY is 20 US gallons.  This has been checked and verified  three times and frankly welcomed on cross country.  The fuel level at 20  gallons in the filler neck is 1/2 way up the tube.  Gary Leinberger's  is the same way after his tank swap.

  

 The CFC modified fuel sight gauge (see " A sight gauge that  really works" at www.customflightcreations.com)  works both in flight or on the ground.  Keep in mind, in the standard fuel  system, the vents on the top of the aircraft cause some low pressure problems  pulling the fuel in the sight gauge off a bit in flight, as does acceleration,  deck angle etc. making it less than repeatable and accurate.  Also, most  inaccuracies in any sight gauge come from fuel trapped in the vent side of the  site gauge (see crude drawing below).  The indicated reading on the site  gauge is greatly affected by this trapped fuel either with the CFC modified  sight gauge or the standard.  Being human, we run the sight gauge line with  some areas that run down hill a bit and cause fuel to be trapped as it is tough  to get fuel across the panel bottom, down the side, then up the windscreen and  down the top to the vent.  If this installation is done perfectly so  it traps no fuel, the standard sight gauge is reasonably accurate.   Retrofitting the CFC line is no picnic either if the tank buts up against  the top of the tank compartment or a lot of foam is used on the top of the  tank...

  

 N12AY is equipped with  JPI fuel totalizer, a sight gauge and a  capacitance fuel probe.  Only the capacitance fuel probe has been a problem  when changing from ethanol enhanced fuel, to and from AV gas.  Ah  to have the float gauge.  One piece of equipment I carry in my aircraft is  a short piece of 1/4 inch hose to blow air down into the sight gauge vent in the  filler neck to remove any trapped fuel if I find it inaccurate after spirited  flying, turbulence or overfilling. 

  

 Regards,

 Bud Yerly

Tech Support, Europa

 Custom Flight Creations, Inc.

www.customflightcreations.com

(813)  653-4989



   

  

                   [url=http://photos.msn.com/Viewing/Album.aspx?PST=8nK2AN1B!1LEiKSdooxx9v4CFFiF2tnPzfqiCRx5lZJb1PK8cJ43U178Cj9K5v0dBOyRUP8ehqN5EQNFDiaRvA%24%24][img]cid:00a301cc0dfa$02C34B75(at)adminPC[/img][/url]

               

    

  

  

  

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kingsnjan(at)westnet.com.
Guest

Posted: Mon May 09, 2011 1:36 am Post subject: Fuel Tank Capacity

> Keep in mind, the tail dragger will hold less because  of the trapped air in the front of the tank, unless there is some shacking and  tail lifting involved.

  

 Bud,

  

 Just pointing out that this problem was address by Mod  34  dated 3 October 1996.

  

 Cheers

 Kingsley

    [quote][b]

Remi Guerner

Joined: 14 Dec 2010
Posts: 284

Posted: Mon May 09, 2011 1:41 am Post subject: Re: Fuel Tank Capacity

Hi Bud,



Regarding capacitance fuel gauges, you mentioned the error caused by the dielectric characteristics of different fuels. Does the gauge read more with 100LL Avgas than with unleaded Mogas, with ethanol or not, or is it the opposite?  



Regards

Remi

budyerly(at)msn.com
Guest

Posted: Mon May 09, 2011 2:21 pm Post subject: Fuel Tank Capacity

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Kingsley,

  

 True, With Mod 34 (the extension of the vent tube to the front of the tank)  now standard, I still find the tail dragger forward tank section has a large air  bubble on normal refuel without coaxing, whereas the trigear will tend to fill  completely. It is not much gas, a half to one gallon, but you can never  have enough gas, unless you are on fire.

  

 Bud

  

  

 [quote]   ---

fklein(at)orcasonline.com
Guest

Posted: Mon May 09, 2011 9:09 pm Post subject: Fuel Tank Capacity

On May 9, 2011, at 3:08 PM, Bud Yerly wrote:

 	  Quote: 	
		  Keep in mind, the tail dragger will hold less because of the trapped air in the front of the tank, unless there is some shacking and tail lifting involved. 	




"shacking" you say...hmmmmm...shacking indeed...would that be some kind of dance, or an old F-4 fighter jock term?

Is it getting pretty hot already down your way Bud?

Fred

do not archive



 [quote][b]

budyerly(at)msn.com
Guest

Posted: Tue May 10, 2011 6:36 am Post subject: Fuel Tank Capacity

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Fred

 It's that fore and aft up and down thrusting motion one uses to fill the  tank of course.

 As for the heat, yes it is, and with a barn full of repairs, new builds and  two nearing first flight we're all exhausted.

 Bud

 [quote]   ---

Remi Guerner

Joined: 14 Dec 2010
Posts: 284

Posted: Tue May 10, 2011 7:40 am Post subject: Re: Fuel Tank Capacity

In my Monowheel, I found that lifting the starboard wing while refueling allows to add about 3 more liters. 

Remi

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