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Peter Folmer, who at first sent me in an engine with severe overheating symtoms, gave me permission to publish his data and experience, so others might benefit.
Here goes:
Repair engine, run in "normal glow engine fashion with cowled engine" in a 3D airplane.
The cylinder had turned all shades of yellow. purple, blue and gray, indicating engine temperatures in excess of 300°C. Piston and cylinder were OK, but crankshaft, conrod and all bearings needed to be replaced.
The cylinder head anodize had lost a few shades of hue (color had bleached) due to the heat.
以上是飛友在描述引擎發生嚴重過熱的情況
還有發生過熱引擎出現的變化
這顆引擎高溫達到高溫達到300度
內部機件都已損壞!!該換都換了
其他就沒太多的重點
以下就是重點了
After repairs, he installed a Venom temperature gage, and these are the results:
這是未安裝導風版引擎溫度的狀態
No cowl:
prop 18x6, rpm 9000 static, max temp. 132°C (static and 3D)
prop 16x12, 8000 rpm static, max temp 118°C (Aerobatics)
這是使用導風版後的情況
Peter then prepared baffling and a cylinder jacket made from aluminium air ducts. For air extraction from the cowl, louvres were made, and they proved very effective.
In flight: max temperature of 95°C (outside air was at 10°C, so quite cool)
ground running: max temp 100°C
Ground running, changing from 1/2 to 1/1 throttle vice versa, the temperature rose to 85 degrees. when the engine returned to idle, the temp. dropped very quickly to 69°C
For Images of his setup, see next post (soon)
大家也一起來分享您是如何讓引擎達到散熱的方法
以上文章來自PRME Engines User Community Forum
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发表于 2013-11-24 11:28
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