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Frog 149 Vibra Glow

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Frog 149 Vibra Glow

Type Model: Glow STD
Engine Size: 1.5cc
Company: Frog
Year of Manufacture:
Test: By AeroModeller July 1956

Details:

Publisher:Frog-Engines
Edition:British
Keywords:Frog-Engines, Frog-Tests
Rating:0.00 (0Vote(s))
File size:1.4 MB
File Type:PDF
File Quality:Clear
Added by:hlsat
File:Frog 149 Vibra Glow
Link to URL:https://flyinghlsat.com/details.php?publication_id=6438
With the above two positive tests to recommend it the FROG 149 diesel was off to a good start. However the companion glow-plug version of the FROG 149 which appeared at the same time did not fare nearly so well. Unlike Chinn Warring also tested the glow-plug model which was identical to the diesel version apart from the different head arrangements needed to accommodate the glow-plug.

The conversion was accomplished using a flanged aluminium alloy head insert in place of the diesel contra-piston. This was centrally tapped to accommodate the plug and was retained by the screw-on cooling jacket. The insert was sealed to the cylinder with a gasket beneath the locating flange. Warring stressed that this assembly needed to be screwed on really tightly to ensure a seal and prevent unscrewing during operation.

Warring found that the 149 glow-plug models main recommendation was its incredibly easy starting. Unless it was completely flooded it started first flick almost every time. As might be expected it did however display a tendency to start backwards particularly on small propellers.

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