From the A-9 came the IMCO Callair B-1,in 1966. This was a considerably larger aircraft with double the hopper capacity and was powered by the Lycoming IO-720 of 400hp. At about this same time the type certification, rights and production was sold to Rockwell Standard Corporation. Production of the B-1 ended I believe after only 36 airframes were completed. Of these, eight came to New Zealand and two others had NZ registrations allocated but did not make it to NZ (ZK-CRS & CRT).
I got the impression that these B-1’s were not particularly well liked by either pilots or engineers and that the 720’s gave their share of problems.
One B-1 (ZK-CRU) was re-engined in NZ with a P&W R985 radial to become a model B-1A.
There is comprehensive thread on the NZ Callairs at the following link.
Below is a selection of photos of IMCO Callair B-1’s
The first four shots show ZK-CRA , c/n 10011 .
Top view is an enginless CRA at Masterton on 02-03-1969 (a common sight for the B-1's) whilst with Air Contracts Ltd.
Second photo shows the standard cowling and exhaust.
View three and four in glorious fading Kodachrome show ZK-CRA at Timaru on 17-09-1977 under Airwork (NZ) Ltd's ownership. Note the modified engine cowlings and exhaust stubs. These gave the aircraft a very distinctive sound.
CRA's last flight was on 28-09-1997 in the Orari Gorge area. I believe it was parked on a hill and the wind rolled the aircraft down a hill on the 30th.
ZK-CRC , c/n 10016 , was seen at Tauranga in March of 1969 having been damaged during February. It went new to Rangitikei Air Services of Taihape, being delivered on 01-07-1966
The Second view shows it at Timaru on 17-12-1973 with Auster Air Services Ltd and carrying spray gear.
It last flew on 07-08-1978 into storage at Rangiora and dismantling. Seen here parked up at Rangiora on 30-08-1978.
ZK-CRI , c/n 10018 , was delivered on 19-08-1966 to Air Services Wairarapa but was relisted to Auster Air Services Ltd at Timaru on 06-10-1966, transferring to Central Aviation from 23-01-1974.
First pic sees her at Balclutha on 26-01-1975 with the second view showing her at Naseby on 15-02-1975. It was withdrawn and cancelled on 05-11-1975.
on 01-08-1977 it was seen in a derelict state at Roxburgh.
ZK-CRJ , c/n 100020 , started with Auster Air Services in late August of 1966, went to Otago Air Services (at some stage ) and finally to Central Aviation on 23-01-1974. It broke its crankshaft near Dunback on 03-09-1975 and was cancelled on 05-11-75. This undated photo shows her parked beside State Highway One just north of Palmerston. The airstrip was actually at the top of the first ridge above the aircrafts nose.
Two inferior B&W shots of the Radial engines B-1A ZK-CRU , c/n 10029 . Undated shots taken at Hamilton. It crashed and was burnt on 16-03-1968.
ZK-CRV was c/n 10030 and first flew at Hamilton on 20-10-1966. It spent its working life with Otago Air Services Ltd and then Airwork (NZ) Ltd until being cancelled on 14-05-1981. First view below shows it at Timaru on 27-11-1967 and the tired fuselage was seen at Timaru on 27-02-1979
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