PA22 fuel dipstick?

[andya]

I carry mine on the airplane so it is available when out on XC or short trips

[Tp109]

Maybe not quite as exact but here is what I use. 1/4 inch is 5 gallons, every 3/4 inch increase = 2 Gallons

[Old3pacer]

I marked a wooden dowel adding gas to an empty tank

[Tp109]

I marked a wooden dowel adding gas to an empty tank

Same here, 3/8 wood dowel about 8 inches long, no markings, stick it in the tank and see how wet it is. Each knuckle on my index finger is 1 inch, hold the stick up to my index finger LOL, and use that chart above if I can't remember 1/4 inch is 5, and every 3/4 inch more is 2 gallons

I NEVER take the plane in the air without dipping the tank, no matter what the gauges say, gauges go bad, had them indicate full with an Empty tank before. If you get used to sticking the tank every time you fly it's not hard to remember that 2 gallons for each 3/4 inch on the stick

[smcnutt]

have made my own from this acrylic tubing from aircraft spruce, from an empty tank (drained) added in 5 gallon increments at the pump and marked a wooden stick for recording measurements then measured locations for each 5 gallons from the bottom of the wood stick and transferred to the acrylic stick. Used a sharpie to mark the
acrylic at each location, then took a file and filed a small groove in the measured locations. remarked the locations where i put the grooves with the sharpie. With the groove the sharpie ink does not seen to get wiped off. at each mark I write the number of gallons for that mark. calibration of the wood stick was done holding it vertical to the ground at the aft part of the tank opening with the stick touching tank bottom. Mine is for a tailwheel conversion and has worked well.
Will find the calibration measurements for tailwheel versions and post.

http://www.aircraftspruce.com/catalo.../acryltube.phpAttachment 11477Attachment 11478

We had an acrylic tube from another plane and re-marked it using Andy's measurements and it works fine. The sharpie can wipe off but we filed notches at those increments and just have to remark it every once in a while with the sharpie.

[Jim Hann]

Fuel stick calibration (PA-22/20, 7.00X6 tires)

Gallons. Inches. Fuel Hawk
5.0. .25 .4
7.5. 1.187. 2.0
10 2.062. 3.5
12.5. 3.062. 5.5
15. 4.25. 7.31
18. 6.5. 11.4

Here is the Fuel Hawk card. I took a picture and keep it on my iPhone and iPad so I'm never with out it. BTW, the Fuel Stop thingy is a really nice addition to that tube.

[Bob.shea]

I have the wood one that came with the plane but carry an old Cessna one that I found (plastic), its reads within about 1/8 inch of my wood one so I carry it in the plane.
not that it really matters I am fuel nuts, I cannot stand run a tank for more than an hour. I run a timer even when I am just flying in the pattern.

[Tp109]

Just realized I'm gallons OCD, I need them in wholes not halfs LOL, I can look at inches in fraction or decimal but I need gas in wholes
6.00 x 6 tires 22/21/20

[Jim Hann]

Just realized I'm gallons OCD, I need them in wholes not halfs LOL, I can look at inches in fraction or decimal but I need gas in wholes

My numbers were derived from the graph included with the Fuel Hawk. Just followed their directions, the tank isn't level on a -20 or -22/20 so it isn't a linear relationship. Notice I do not have 18 gallons on my chart because it is 11.4, the chart only uses whole numbers on the stick.

[Tp109]

I understand that, I am using an oak dowel with no markings and I eyeball how many inches are wet after dipping, works good enough, and like you say since getting a new ab spring on the back my gallons per inch need rechecked since the new spring raised the tail about two inches