Section 8 .
Exhaust and Cooling System
This section has been done for some time. Due to some unfortunate computer problems there has been a delay in updating progress.
There should be a flow of stuff for you all to browse in the near future!
The exhaust first had to be wrapped with heat insulating material and the flanges were filed flat. Next came the paint that took a few days to dry. When installing the exhaust bolts in the cylinder heads, I found that using a little anti-seize on the threads eased their installation.
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The end was taped to keep moisture and mice out. I live out in the sticks so mice are fairly abundant. I did have some mice stuck on glue traps for you to see....I changed my mind about posting them.
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This is the radiator shroud. It had to be trimmed up a little and all of the openings for the radiator hoses had to be cut.
The shroud is now fit to the radiator. The next step will be to install it temporarily and line it up with the fan.
Once the fan was aligned, the collar that surrounds the fan could be installed to the top of the shroud. It is also important that you remember the forward tailrotor drive belt. It must be installed before the radiator.
Here you see one of the two rear radiator mounting straps that had to be fabricated.
This is the coolant resevoir. It was mounted as per RotorWay instructions, however, I believe some builders may have another way to mount this so that flexing of the frame does not damage the tabs welded to the sides...Any suggestions???
The 162f uses a dry sump type oil system. This means that the main source for holding engine oil is in a tank, as opposed to an oil pan bolted directly to the bottom of the engine. This tank holds approx. 5 Qts. of oil. Inside the tank is a small radiator which is submerged in the oil. This is a trick setup in that coolant from the main radiator circulates through the one inside this little tank, in turn, cooling the engine oil. Oil temperatures can run fairly high. Around 180-200 degrees F. The coolant passing the oil sump is aprox. 160 degrees F. This, along with a lot of other features is what makes this helicopter shine among it's compitition.(In my opinion, of course.)
You can now see this thing is starting to grow. I have opted to sleeve all of the hoses with fire sleeve. Though it is not required to do them all, I think it will be well worth the effort in the long run. It may help to reduce temperatures in both the cooling systems and will definitely protect the hoses.
Oil filter housing and all oil lines installed. The lines were all primed with oil when installed and will be done again just before starting the engine for the first time.
This is a better view of the radiator.
For the sake of tying up some loose ends, I decided to finally break down and make the collective scissors mount. So here it is.
Next section will be the fuel system.