Post by emron on Aug 4, 2018 19:36:47 GMT 12
I've had a look at the parts books for the Hudson, Lodestar, and Ventura that we have at Ferrymead. The illustrations of the wing group in the Hudson and Lodestar look identical but of course the P/Ns are different (Hudson wing is 70271, Lodestar 73681 and Ventura 19009 each with L or R suffix as appropriate).
The Lodestar manual we have shows a straight trailing edge to the flap bay identical to the Hudson not the kinked style of the Ventura. However the parts list shows two different numbers for the centre sections namely 50137 and 50173-500 which are annotated as Commercial and Conversion respectively which suggests some sort of option to me. (Its interesting that the centre sections have the same P/N left and right when structurally they are handed side to side.)
The other clue to the idea of an option thing comes from the Ventura manual which shows a separate item as the kinked trailing edge.
As to the interchangeability of outer wings all I can say is that I've always been led to believe that Hudson and Lodestar ones fit one another. MoTaTs Ventura has Lodestar wings fitted but difference in structure required the fabrication of attachment adaptors. Queensland Air Museum are going down the same path with their Ventura using Lodestar wings from the US and a Hudson wing from us.
Probably coming to this post a bit late to be adding much to the discussion but from experience with the hybrid Lockheeds at MOTAT I can confirm that there are significant differences between the 3 wings. The Hudson centre section has different attachment fittings on the spar ends compared to the Lodestar so their wings are not directly interchangeable. The L18 is a larger airframe than the L14 and appears to have a strengthened spar fitting. I haven’t compared the drawings to see if there are other structural differences. Perhaps if it was permitted to use those strengthened fittings on the Hudson centre section then the Lodestar wing would fit as all the other screw and bolt spacings are identical. Similarly if the strengthened fittings were approved for use on the Hudson wing then they would fit on the Lodestar. But considering the seeming abundance of Lodestar wings would that requirement have ever arisen?. I’ve no idea if either of these mods was documented or carried out.
The Ventura had a maximum take off weight 60% greater than the other two. It’s centre-section, wing and flap are more substantial. The wings are attached with 1/4in screws vs 10-32 on the others. The attachment fittings at the spar joints are even more rugged than the Lodestar’s. So this wing would only have been able to be swapped onto another Ventura.