The Biplane Forum > Biplane Builder's Forums > Pitts > Pitts Miscellaneous > Pitts external fuel tank



Help Support Biplane Forum by donating using the link above or becoming a Supporting Member.
Reply
 
Thread Tools Display Modes
Old 04-20-2017, 05:34 AM   #1
flyingbandit
Registered Users
 
flyingbandit's Avatar
 
Join Date: Feb 2015
Posts: 23
Liked 4 Times on 4 Posts
Likes Given: 2

Default Pitts external fuel tank

I'm planning to build an external fuel tank for my S1....I'm curious if anyone on the forum has built or uses an external fuel tank. I would like to hear your experiences and recommendations before I begin. I need ideas on baffles yes or no, rear attach points, fuel caps, venting and anything that you feel may be helpful. Thanks in advance.
Nelson


flyingbandit is offline  
mreinh3233 Likes This 
Reply With Quote
Old 04-20-2017, 06:48 AM   #2
TFF1
Registered Users
 
Join Date: Apr 2010
Location: Memphis,TN
Posts: 2,715
Liked 460 Times on 356 Posts
Likes Given: 1

Default

How big are you building it and how are you going to pump to main tank?


TFF1 is offline  
 
Reply With Quote
Old 04-20-2017, 12:08 PM   #3
PittsDriver68
Registered Users
 
Join Date: Jan 2013
Location: NH
Posts: 3,662
Liked 955 Times on 685 Posts
Likes Given: 2

Default

Since the exhaust will be cooking it, insulate the front.

Most airplanes with belly tanks have their exhaust aimed away from the belly area.

Wear nomex?

Best of luck,

Wes
PittsDriver68 is offline  
 
Reply With Quote
Old 04-20-2017, 12:15 PM   #4
flyingbandit
Registered Users
 
flyingbandit's Avatar
 
Join Date: Feb 2015
Posts: 23
Liked 4 Times on 4 Posts
Likes Given: 2

Default

I haven't decided how big I'll make it....I have two spinners with base diameters of about 12 inches. I'll probably plum it directly to the fuel selector valve and bypass the main tank. I was thinking that the engine pump would probably be enough, but I can use the boost pump if needed. However, I'm looking for advice here....what has been your experience? Is your external fuel tank plumbed to the main?
flyingbandit is offline  
 
Reply With Quote
Old 04-20-2017, 12:16 PM   #5
cgzro
Peter Ashwood-Smith P
 
cgzro's Avatar
 
Join Date: Nov 2012
Location: Gatineau, Quebec, Canada
Posts: 947
Liked 253 Times on 181 Posts

Default Pitts external fuel tank

Didnt they make a wrap around thing for the top wing?
cgzro is offline  
 
Reply With Quote
Old 04-20-2017, 12:20 PM   #6
flyingbandit
Registered Users
 
flyingbandit's Avatar
 
Join Date: Feb 2015
Posts: 23
Liked 4 Times on 4 Posts
Likes Given: 2

Default

Wes,
Of the external tanks I've seen on a pitts, they have been offset from center using the old gear mount as the forward mount so the exaust isn't blowing directly on the tank and they didn't appear to be insulated.
flyingbandit is offline  
 
Reply With Quote
Old 04-20-2017, 12:24 PM   #7
smizo
Moderator
BiP_MODERATOR.png
 
smizo's Avatar
 
Join Date: Sep 2009
Location: Tunkhannock PA
Posts: 5,438
Liked 2596 Times on 1234 Posts
Likes Given: 3694

Default

save the weight of the pump. don't use one........ plumb it to the main tank, with a nice big fat hose. put a check valve in the hose so the gas from the main tank doesn't flow into the "bomb" then just fly inverted to transfer the fuel........
__________________
Chris Murley
Acrosport 2S N13XT
Wolf Aircraft Products / Griggs Aircraft
Tunkhannock, PA
smizo is offline  
Cary Cumberland Likes This 
Reply With Quote
Old 04-20-2017, 01:37 PM   #8
DanSalcedo
BiP_SUPPORTER.png
 
DanSalcedo's Avatar
 
Join Date: Dec 2008
Location: Fort Lauderdale, FL
Posts: 179
Liked 20 Times on 15 Posts

Send a message via MSN to DanSalcedo
Default

Here's a pic of mine leaving Kathy Jaffe Challenge. This one is 11 gals, but I made another that is 17 gals, 2 baffles. plumb to selector valve aux position. Engine pump sucks it out of tank. The 17 gal tank came off an S-1T.

__________________
Dan Salcedo
Pitts S-2A
Pitts S-1-11
DanSalcedo is offline  
 
Reply With Quote
Old 04-20-2017, 06:23 PM   #9
mreinh3233
Registered Users
 
mreinh3233's Avatar
 
Join Date: Jun 2014
Posts: 218
Liked 54 Times on 35 Posts
Likes Given: 216

Default

Don't like belly tanks you can't jettison when the engine quits. You run the risk of spreading the gear and spewing "X" amount of fuel all over the crash site. On the up side it does make it easy for search and rescue to find you, they just go to the fireball/smoke. Might just be my helicopter mentality creeping in on me though.
mreinh3233 is offline  
 
Reply With Quote
Old 04-20-2017, 07:49 PM   #10
Knight Twister
Senior Member
 
Join Date: Jan 2008
Location: My mom\'s basement in flyover country
Posts: 2,420
Liked 929 Times on 599 Posts
Likes Given: 90

Default

True, you run the risk of off airport landing and potential for fire. If you think about it you still have a molotov cocktail in your lap. Landing these high performance biplanes anywhere but an airport is all part of the managed risk.
Knight Twister is online now  
 
Reply With Quote
Old 04-20-2017, 08:06 PM   #11
buck_justice
MikeH
 
buck_justice's Avatar
 
Join Date: Nov 2015
Location: San Antonio, Texas 8T8
Posts: 241
Liked 43 Times on 37 Posts
Likes Given: 21

Send a message via Yahoo to buck_justice
Default

Very interesting discussion, I prefer the idea of internal as opposed to external. In my C210 I'm wanting to replace the rear bench seat with a tank.
On a Pitts how about, A tank built into the seat, or directly aft of the seat in an upright position, or center floor area. Are areas that come to mind. Or, How about a torpedo mounted on top of the wing that's removable, for when you get where your going?
__________________
Mike H
Pitts S1S

Last edited by buck_justice; 04-21-2017 at 12:19 PM. Reason: Had to clean that up to reflect what i meant, after re-reading
buck_justice is offline  
 
Reply With Quote
Old 04-20-2017, 08:35 PM   #12
Morphewb
BiP_LIFETIMESUPPORTER.png
 
Join Date: Jun 2009
Location: McKinney Texas
Posts: 1,259
Liked 439 Times on 262 Posts
Likes Given: 77

Default

We all had them, we all used them, we all knew what the risks were and we did it anyway. Of course it helped being 40 years younger but it still seems like one of the more dumb things I ever did in a Pitts. I'll swear if Henry Haigh had found a way to put four of them on his plane everyone would have them on their airplanes the very next year. Interesting thing is I can't remember anyone ever having a problem with any of that stuff though and obviously Dan still has confidence in the system or he wouldn't use it these days. It's one good way to almost double the range of a spring gear Pitts with very little extra fabrication and plumbing if you're willing to not think too much about the consequences.

Someone mentioned the slipper type ''over the wing tanks''. I have two I'll give anyone if they'll pay the shipping. Don't know if they worked better or worse than the belly bombs but I never tried flying one but I'll have to say that I picked them up at salvage sales and hangar give away specials. Just couldn't see throwing that much aluminum away but never had the guts to try one out empty or full.
__________________
Pitts
Morphewb is offline  
 
Reply With Quote
Old 04-20-2017, 09:42 PM   #13
cgzro
Peter Ashwood-Smith P
 
cgzro's Avatar
 
Join Date: Nov 2012
Location: Gatineau, Quebec, Canada
Posts: 947
Liked 253 Times on 181 Posts

Default

any pics of the over wing slipperd?
cgzro is offline  
 
Reply With Quote
Old 04-20-2017, 10:06 PM   #14
Morphewb
BiP_LIFETIMESUPPORTER.png
 
Join Date: Jun 2009
Location: McKinney Texas
Posts: 1,259
Liked 439 Times on 262 Posts
Likes Given: 77

Default

I never saw them on an airplane. Both showed up at different times and even if I had a Pitts now I don't think I'd chance screwing up the paint just to get a picture or even see how they fit. I can send some of them ''as is'' but I think they were a Gordon Price idea so you might be more successful getting info about them around your place. Both tanks look like they were made more or less off the same ''tooling'', one painted, the other just aluminum.

I'll be glad to post some pics in a day or so, maybe sooner.
__________________
Pitts
Morphewb is offline  
 
Reply With Quote
Old 04-21-2017, 03:01 AM   #15
jstreat
 
jstreat's Avatar
 
Join Date: Feb 2011
Location: Kelly Airpark, Elbert, CO
Posts: 602
Liked 165 Times on 97 Posts

Default

C. Argon used a upper conformal fuel tank on her S1T years ago when she traveled from Calif to Nationals. Was easy on and off on site. Padded tank, two straps, and fitting to fuel line from upper wing tank to main valve. Simple. I thought about building a Conformal Fuel tank under the belly between the gear. Decided against it. 2.5 hours range is enough for me. Like small airports and meeting new people along the way.

JST
__________________
JSTreat
jstreat is offline  
 
Reply With Quote
Old 04-21-2017, 10:47 AM   #16
DanSalcedo
BiP_SUPPORTER.png
 
DanSalcedo's Avatar
 
Join Date: Dec 2008
Location: Fort Lauderdale, FL
Posts: 179
Liked 20 Times on 15 Posts

Send a message via MSN to DanSalcedo
Default

I don't travel that much, but it was nice to fly from Ft Lauderdale to Nationals with one fuel stop. (I don't cut the corner) On the trip home there was a slight tailwind, and my first stop was south of Tallahassee, Cross City. I guess that's normal for a monoplane. My S-1-11 seat is carbon fiber and contoured and is very comfortable. Would not want to do a 4 hour leg in the S-2A.

Dan
__________________
Dan Salcedo
Pitts S-2A
Pitts S-1-11
DanSalcedo is offline  
 
Reply With Quote
Old 04-21-2017, 12:01 PM   #17
Dennis Flamini
BiP_SUPPORTER.png
 
Dennis Flamini's Avatar
 
Join Date: Sep 2007
Location: Near Chicago Acrosport 2 Pitts S-1S
Posts: 1,962
Liked 693 Times on 433 Posts
Likes Given: 971

Default

Dan,
How fast was it with the tank?
__________________
Dennis near Chicago
How can you not be romantic about biplanes.
If your Father is poor it's fate, if your Father-in-law is poor it's stupidity
Wilbur Wright said he "did not have time for both a wife and an airplane."
Which is the better portion -- bondage bought with a ring,
Or a harem of dusky beauties, fifty tied in a string?
Dennis Flamini is offline  
 
Reply With Quote
Old 04-21-2017, 05:31 PM   #18
DanSalcedo
BiP_SUPPORTER.png
 
DanSalcedo's Avatar
 
Join Date: Dec 2008
Location: Fort Lauderdale, FL
Posts: 179
Liked 20 Times on 15 Posts

Send a message via MSN to DanSalcedo
Default

Didn't seem to slow it down any, 185 mph at 25 sq

On the x-country, 195 on the GPS at 10,000. Throttle wide open 20", 2200 rpm, 10GPH. 56 gal total

30 gal main
3 gal header
6 gal upper wing
17 gal belly


__________________
Dan Salcedo
Pitts S-2A
Pitts S-1-11
DanSalcedo 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
Pitts S1S fuel tank R&R CAKevin Pitts 14 12-05-2016 04:19 PM
Pitts S1S MAIN fuel tank available paulyardy Classifieds 0 11-09-2015 08:52 PM
External Fuel Sight Gauge bf92 Firewall Forward & Fuel System 3 10-09-2013 02:44 AM
Looking for a stock pitts fuel tank PowerStroke Classifieds 1 06-02-2013 12:00 PM
Pitts S1-C Fuel Tank TomBlade Pitts 9 01-31-2012 12:51 PM