Here we have a rather rare picture of what appears to be a Po-2 air ambulance with a hard skin and shell over the transport compartment, i suspect it is some form of Bakelite ¶As part of the Po-2M project the cargo area would be modular to allow for multi mission field configuration ¶In this case the primary modernization would be a widened passenger section to accommodate access by the medic via a catwalk equipped with modern life support and strip lighting for a pair of patients ¶The body of the module would be fiberglass while the rest of the airframe would be modern shrink wrapped skin preferably Oratex ¶The Po-2M itself would receive other modernizations which are beyond the scope of this particular post