【转kk】发动机空气冷却道的要点

沈淼章 · 发表于 2014-2-5 14:58:48

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很有参考价值，帖子来自www.5irc.com 如何讓引擎達到有效的冷卻效果

如何讓引擎達到有效的冷卻效果

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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