Oil Capacity

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ClipperLuna
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Oil Capacity

Post by ClipperLuna »

Anyone know why the dipstick goes up to 10 quarts when the POH says the oil capacity is 12? Total capacity in the Payload/Fuel manager is also apparently 10 quarts.

Jarek
Senior Airman
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Joined: 31 Aug 2018, 14:59

Re: Oil Capacity

Post by Jarek »

Good catch. Dipsticks for TSIO 520 that can be found on ebay (like one below) indeed have 12qts top mark. 6 is low *.
"Oil capacity 12qts." label on the cap. However, scale on this stick depends on the specific installation in the airplane.

https://www.ebay.com/itm/Continental-TS ... 3256292738

There is an interesting remark in the Type Certificate for TSIO-520-B: Oil sump capacity: 12; 10 usable at 18° noseup
and 14° nosedown attitudes.


Source: http://www.airweb.faa.gov/Regulatory_an ... E/E5ce.pdf

* FAR 33.39 Lubrication system (a) The lubrication system of the engine must be designed and constructed so that it will function properly in all flight attitudes and atmospheric conditions in which the airplane is expected to operate. In wet sump engines, this requirement must be met when only one-half of the maximum lubricant supply is in the engine.

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AKar
A2A Master Mechanic
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Joined: 26 May 2013, 05:03

Re: Oil Capacity

Post by AKar »

For IO-520-B, the capacity is 12 with 10 usable at aforementioned attitudes.

-Esa

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Piper_EEWL
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Re: Oil Capacity

Post by Piper_EEWL »

So the dipstick only reads 10qts so you don’t over fill it?
B377&COTS, J3 Cub, B-17G, Spitfire, P-40, P-51D, C172, C182, Pa28, Pa24, T-6 Texan, L-049&COTS, Bonanza V35B

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AKar
A2A Master Mechanic
Posts: 5207
Joined: 26 May 2013, 05:03

Re: Oil Capacity

Post by AKar »

Could be a mistake.

-Esa

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Piper_EEWL
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Joined: 26 Nov 2014, 14:14
Location: Germany

Re: Oil Capacity

Post by Piper_EEWL »

Interesting. I was trying to find some more information but I can’t find a picture of a Continental IO-550 oil dipstick. Maybe Scott can shed some light here...
B377&COTS, J3 Cub, B-17G, Spitfire, P-40, P-51D, C172, C182, Pa28, Pa24, T-6 Texan, L-049&COTS, Bonanza V35B

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