The Biplane Forum > Biplane Builder's Forums > Pitts > Fueling a Pitts



Help Support Biplane Forum by donating using the link above or becoming a Supporting Member.
Reply
 
Thread Tools Display Modes
Old 11-14-2017, 01:55 AM   #1
snaffle
Registered Users
 
snaffle's Avatar
 
Join Date: Aug 2009
Location: Goshen, CT
Posts: 45
Liked 7 Times on 6 Posts
Likes Given: 11

Default Fueling a Pitts

I just read an article in AOPA Pilot concerning safe fuel handling, airplanes burning up to be specific. In that the fueling nozzle won't fit under the cabane, I would guess that most of us use a short piece of tygon tubing as an extension to the tank. Does the use of a plastic tube break the grounding bond? Does the plastic actually create static? Is the exhaust stack a good bonding point? Thanks.


snaffle is offline  
 
Reply With Quote
Old 11-14-2017, 02:20 AM   #2
taildraggerpilot
Registered Users
BiP_SUPPORTER.png
 
taildraggerpilot's Avatar
 
Join Date: May 2012
Posts: 141
Liked 41 Times on 24 Posts
Likes Given: 6

Default

The fuel tank doesn't have much if any ground path on a Pitts. The tank is supported by steel straps which have bonded rubber strips. These straps support the tank and the rubber cushions the tank and prevents movement/damage. The tank is therefore suspended by a rubber isolator. All hoses are rubber and use some sort of anodized aluminum fittings (annodize is non-conductive).
Grounding to the exhaust or any other part of the airplane does no good if trying to ground to the fuel tank, because its isolated.

I use a clear plastic tube because it lets me see when the fuel level is full. Is there a risk of static discharge, sure. You could also discharge some static by walking across the hangar floor wearing nylon pants as well. Or it could happen by removing a winter hat and checking your fuel level. I personally don't worry about it.


taildraggerpilot is offline  
 
Reply With Quote
Old 11-14-2017, 02:35 AM   #3
will moffitt
Registered Users
BiP_SUPPORTER.png
 
will moffitt's Avatar
 
Join Date: Jul 2012
Location: Anacortes, Wa
Posts: 1,292
Liked 311 Times on 221 Posts
Likes Given: 502

Default

A friend was fueling his piper, tail dragger tripacer, what ever they are called. He was using a 5 gal jug. It arced. Got it out with the fire extinguisher. I don't know if he was grounded.

I think the fuel fill on mine could have been moved forward and made life much easier.

will
will moffitt is offline  
 
Reply With Quote
Old 11-14-2017, 02:40 AM   #4
snaffle
Registered Users
 
snaffle's Avatar
 
Join Date: Aug 2009
Location: Goshen, CT
Posts: 45
Liked 7 Times on 6 Posts
Likes Given: 11

Default

Thanks, been fueling her for 10 years now and was just wondering if I was perhaps missing something. Even fueling a Pitts is a learned and skilled process. My first few attempts resulted in impressive geysers.
snaffle is offline  
 
Reply With Quote
Old 11-14-2017, 05:17 AM   #5
Larry Lyons
Registered Users
BiP_LIFETIMESUPPORTER.png
 
Larry Lyons's Avatar
 
Join Date: Oct 2012
Location: Stockton, IL.
Posts: 3,409
Liked 788 Times on 604 Posts
Likes Given: 1427

Default

Two things. One, if you have a electric fuel guage the tank is grounded; Two, after a little practice you can hear the difference in sound as the tank sgfills. I personally put the nozzle down about a 1/4" below the filler neck, when getting close the sound goes away completely, I immediately stop filling, look and fill very slowly to full.
__________________
Larry Lyons
Rebuilt:
Smith Mini, flying
Taylorcraft, almost flying
and on going Taylorcraft project

In dog beers I've only had one!
Larry Lyons is offline  
 
Reply With Quote
Old 11-14-2017, 06:45 AM   #6
EAABipe40FF
Registered Users
BiP_SUPPORTER.png
 
EAABipe40FF's Avatar
 
Join Date: May 2009
Location: Springfield, WV
Posts: 4,375
Liked 830 Times on 660 Posts
Likes Given: 579

Default

Larry, I use to could do that but now I can't hear it. I stick my little pinky in next to the hose and can feel the cool air/vapor as the gas gets close to the top, at least in the summer.
__________________
Finished Spezio Tu-holer N92JM(Oct. 2011), AcroDuster 2- SA750 N22JM, first flight 12-14-15
2Cor5:17
EAABipe40FF is offline  
cwspilot Likes This 
Reply With Quote
Old 11-14-2017, 09:03 AM   #7
pigpenracing
BiP_SUPPORTER.png
 
pigpenracing's Avatar
 
Join Date: Dec 2009
Location: Brenham Texas
Posts: 2,000
Liked 484 Times on 282 Posts
Likes Given: 485

Default

Quote:
Originally Posted by EAABipe40FF View Post
Larry, I use to could do that but now I can't hear it. I stick my little pinky in next to the hose and can feel the cool air/vapor as the gas gets close to the top, at least in the summer.
Make a dip stick with 1 gallon marks. When you pull to the pump stick it in. If it shows 5 gallons low pump in 5 gallons!
pigpenracing is offline  
Dana Likes This 
Reply With Quote
Old 11-14-2017, 12:47 PM   #8
EAABipe40FF
Registered Users
BiP_SUPPORTER.png
 
EAABipe40FF's Avatar
 
Join Date: May 2009
Location: Springfield, WV
Posts: 4,375
Liked 830 Times on 660 Posts
Likes Given: 579

Default

Quote:
Originally Posted by pigpenracing View Post
Make a dip stick with 1 gallon marks. When you pull to the pump stick it in. If it shows 5 gallons low pump in 5 gallons!
Not easy to get the last drop, If the stick says to pump 5 better to only pump 4 or the ramp may get wet
__________________
Finished Spezio Tu-holer N92JM(Oct. 2011), AcroDuster 2- SA750 N22JM, first flight 12-14-15
2Cor5:17
EAABipe40FF is offline  
cwspilot Likes This 
Reply With Quote
Old 11-14-2017, 01:06 PM   #9
PittsDriver68
Registered Users
 
Join Date: Jan 2013
Location: NH
Posts: 3,659
Liked 952 Times on 682 Posts
Likes Given: 2

Default

What I do is put my clear hose 3" into the tank. I can usually hear the splashing of the fuel until it reaches the end of the clear hose. When I stop the fuel nozzle I can see fuel backed up in the clear hose until I lift it above the surface of the fuel in the tank, at which point the clear hose drains. I then adjust the position of the clear hose so that only 1" or so is in the tank. I start squirting a half or 3/4 gallon at a time. When I have done a squirt and the fuel is backed up in the clear hose, I'm done.

Avoids the mess. On the S-2A, if you fill the tank, when you put the cap back on you get a quart siphoned onto the ramp through the vent line. Have to take the cap back off to break the siphon effect. You learn not to fill to the very top.

Best of luck,

Wes
PittsDriver68 is offline  
4
People Like This 
Reply With Quote
Old 11-14-2017, 01:14 PM   #10
cwspilot
BiP_SUPPORTER.png
 
Join Date: Dec 2015
Location: Horton, MI. Just south of KJXN
Posts: 239
Liked 28 Times on 25 Posts
Likes Given: 270

Default

That happens on my 2E also Wes. I thought it was just my technique. Glad to see I have company. It must drain a whole quart out when I dont catch it in time.
__________________
Pitts S2E, Schreder HP-18, Rans S6S Amphib
cwspilot is offline  
 
Reply With Quote
Old 11-14-2017, 03:12 PM   #11
bf92
BiP_LIFETIMESUPPORTER.png
 
bf92's Avatar
 
Join Date: Jan 2008
Location: Bountiful, UT
Posts: 1,539
Liked 325 Times on 207 Posts
Likes Given: 7

Default

Problem solved:

http://www.biplaneforum.com/showthread.php?t=8889

I stop at 35 gal., read the meter, then add 3 gals.

Danny
__________________
Local FAA inspector:\"Remember, we\'re not happy till you\'re not happy!\"

Last edited by bf92; 11-14-2017 at 05:00 PM.
bf92 is offline  
cwspilot Likes This 
Reply With Quote
Old 11-14-2017, 03:52 PM   #12
cwspilot
BiP_SUPPORTER.png
 
Join Date: Dec 2015
Location: Horton, MI. Just south of KJXN
Posts: 239
Liked 28 Times on 25 Posts
Likes Given: 270

Default

Nice!
__________________
Pitts S2E, Schreder HP-18, Rans S6S Amphib
cwspilot is offline  
 
Reply With Quote
Old 11-14-2017, 08:49 PM   #13
EAABipe40FF
Registered Users
BiP_SUPPORTER.png
 
EAABipe40FF's Avatar
 
Join Date: May 2009
Location: Springfield, WV
Posts: 4,375
Liked 830 Times on 660 Posts
Likes Given: 579

Default

Ben, my AD2 won't hold 35 gal.

Seriously, that is really cool.

I find myself doing Wes's routine but have to stop when the hose is @ 1". If I try anymore what's left in the hose will over fill. If I do manage to exactly top it off about a pint will drain out the vent. It requires practice to do it right every time.

Back to pigpens stick. I don't carry my stick. Had to remove the back of the baggage compartment to install shoulder harness so can't use it. Something else to fix.....

I'll add it to the list. I've decided if no one buys the airplane I'll rebuild the fuselage and keep looking for an engine.
__________________
Finished Spezio Tu-holer N92JM(Oct. 2011), AcroDuster 2- SA750 N22JM, first flight 12-14-15
2Cor5:17

Last edited by EAABipe40FF; 11-14-2017 at 08:57 PM.
EAABipe40FF is offline  
 
Reply With Quote
Old 11-15-2017, 12:46 AM   #14
cgzro
Peter Ashwood-Smith P
 
cgzro's Avatar
 
Join Date: Nov 2012
Location: Gatineau, Quebec, Canada
Posts: 946
Liked 253 Times on 181 Posts

Default

I have a 90 degree plastic elbow joining two tygon tubes, i usually put a finger into the filler neck and its short enough my finger gets wet just as im 1/2 gallon from full, but it does require care not do make a mess.


cgzro is offline  
 
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fueling Pitts S1C pacer18a Pitts Miscellaneous 12 10-18-2010 09:46 PM