A fan housing has a radially outer surface. A pair of radially intermediate surfaces includes a first surface spaced towards a first axial end, which has an inner bore positioned radially outward of an inner bore of a second surface. Vanes extend between the radially outer surface and an outer perip
A fan housing has a radially outer surface. A pair of radially intermediate surfaces includes a first surface spaced towards a first axial end, which has an inner bore positioned radially outward of an inner bore of a second surface. Vanes extend between the radially outer surface and an outer periphery of the pair of radially intermediate surfaces. A bearing bore extends radially inwardly of the first surface. A mounting lug nub is formed on an outer periphery of the radially outer surface. A first distance is defined between the first axial one end of the fan housing and an opposed axial end. A second distance is defined between the first axial end and a center of the mounting lug. A ratio of the first distance to the second distance is between 2.13 and 2.11. An intermediate part, a ram air fan and a method are also disclosed.
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1. A fan housing comprising: a radially outer surface and a pair of radially intermediate features spaced radially inwardly from said radially outer surface, one of said pair of radially intermediate features including a first inner surface spaced towards a first axial end of said fan housing, said
1. A fan housing comprising: a radially outer surface and a pair of radially intermediate features spaced radially inwardly from said radially outer surface, one of said pair of radially intermediate features including a first inner surface spaced towards a first axial end of said fan housing, said first inner surface having an inner bore positioned radially outward of an inner bore of a second inner surface defined by the other of said pair of radially intermediate features, a plurality of vanes extending between said radially outer surface and an outer periphery of each of said pair of radially intermediate features;a bearing bore extending radially inwardly of said first surface;a mounting lug nub formed on an outer periphery of said radially outer surface, a first distance defined between said first axial end of said housing and an opposed axial end, and a second distance defined between said first axial end and an axial center of said mounting lug nub, and a ratio of said first distance to said second distance being between 2.13 and 2.11; anda center of gravity existing for said fan housing, and there being a third distance from said first axial end of said fan housing to an axial position of said center of gravity, and a ratio of said second distance to said third distance being between 1.07 and 1.00. 2. The fan housing as set forth in claim 1, wherein said mounting lug nub extending radially outward of said outer surface of said radially outer surface for a forth distance, and said outer periphery of said radially outer surface being spaced from a center axis of said fan housing by a first radius, and a ratio of said fourth distance to said first radius being between 0.017 and 0.003. 3. The fan housing as set forth in claim 1, wherein said bearing extending from said first axial end and towards said opposed axial end. 4. An intermediate part comprising: a radially outer surface and a pair of radially intermediate features spaced radially inwardly from said radially outer surface, one of said pair of radially intermediate features including a first inner surface spaced towards a first axial end of said fan housing, said first inner surface having an inner bore positioned radially outward of an inner bore of a second inner surface defined by the other of said pair of radially intermediate features, a plurality of vanes extending between said radially outer surface and an outer periphery of each of said pair of radially intermediate features;a bearing bore extends extending inwardly of said first surface;a mounting lug nub formed on an outer periphery of said radially outer surface, a first distance defined between said first axial end of said housing and an opposed axial end, and a second distance defined between said first axial end and am axial center of said mounting lug nub, and a ratio of said first distance to said second distance being between 2.13 and 2.11; anda center of gravity existing for said fan housing, and there being a third distance from said first axial end of said fan housing to an axial position of said center of gravity, and a ratio of said second distance to said third distance being between 1.07 and 1.00. 5. The intermediate part as set forth in claim 4, wherein said bearing extending from said first axial end and towards said opposed axial end. 6. A ram air fan comprising: a ram air fan including a motor connected to rotate with a shaft, said shaft connected to rotate with an impeller;a fan housing with a radially outer surface and a pair of radially intermediate features spaced radially inwardly from said radially outer surface, one of said pair of radially intermediate features including a first surface spaced towards a first axial end of said fan housing, said first inner surface having an inner bore positioned radially outward of an inner bore of a second inner surface defined by the other of said pair of radially intermediate features, a plurality of vanes extending between said radially outer surface and an outer periphery of each of said pair of radially intermediate features, a bearing bore extending radially inwardly of said first surface, the bearing bore supporting a bearing for said shaft, a mounting lug nub formed on an outer periphery of said radially outer surface, a first distance defined between said first axial end of said housing and an opposed axial end, and a second distance defined between said first axial end and an axial center of said mounting lug nub, and a ratio of said first distance to said second distance being between 2.13 and 2.11; anda center of gravity exists for said fan housing, and there being a third distance from said first axial end of said fan housing to an axial position of said center of gravity, and a ratio of said second distance to said third distance being between 1.07 and 1.00. 7. The ram air fan as set forth in claim 6, wherein said mounting lug nub extending radially outward of said outer surface of said radially outer surface for a forth distance, and said outer periphery of said radially outer surface being spaced from a center axis of said fan housing by a first radius, and a ratio of said fourth distance to said first radius being between 0.017 and 0.003. 8. The ram air fan of claim 6, wherein said bearing extending from said first axial end and towards said opposed axial end. 9. A method of repairing a ram air fan comprising the steps of: removing a fan housing from a ram air fan, said fan housing including a bearing bore for supporting a bearing on a shaft;replacing said removed fan housing with a new fan housing;the new fan housing having a radially outer surface and a pair of radially intermediate features spaced radially inwardly from said radially outer surface, one of said pair of radially intermediate features including a first inner surface spaced towards a first axial end of said fan housing, said first inner surface having an inner bore positioned radially outward of an inner bore of a second inner surface defined by the other of said pair of radially intermediate features, a plurality of vanes extending between said radially outer surface and an outer periphery of each of said pair of radially intermediate features;a bearing bore extending radially inwardly of said first surface;a mounting lug nub formed on an outer periphery of said radially outer surface, a first distance defined between said first axial end of said housing and an opposed axial end, and a second distance defined between said first axial end and an axial center of said mounting lug nub, and a ratio of said first distance to said second distance being between 2.13 and 2.11; anda center of gravity exists for said fan housing, and there being a third distance from said first axial end of said fan housing to an axial position of said center of gravity, and a ratio of said second distance to said third distance being between 1.07 and 1.00. 10. The method as set forth in claim 9, wherein said mounting lug nub extending radially outward of said outer surface of said radially outer surface for a fourth distance, and said outer periphery of said radially outer surface being spaced from a center axis of said fan housing by a first radius, and a ratio of said fourth distance to said first radius being between 0.017 and 0.003. 11. The method of claim 9, wherein said bearing extending from said first axial end and towards said opposed axial end.
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