Fitting a cowl
09-21-2006 | 10:29 AM
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From: Apex,
NC
Fitting a cowl
Does anybody have some helpful insights or "beware of"s to fitting a cowl, i.e. cutting holes for the cylinder head and pitts pipes on my .60 sized extra 300? It's my first, and I just don't want to "dork-it" (that is - before I get it to the field!). I'd appreciate any advice, thanks.
09-21-2006 | 11:34 AM
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From: Back home in,
OH
RE: Fitting a cowl
Hey Hardrock!
I suggest going to the Tower Hobbies website and look at the U-Can-Do 60.
You can download the assembly manual.
In it they have a slick method of locating the necessary holes in the cowl for mixture needles, exhaust, etc.
It works really well.
Good luck!
JLK
I suggest going to the Tower Hobbies website and look at the U-Can-Do 60.
You can download the assembly manual.
In it they have a slick method of locating the necessary holes in the cowl for mixture needles, exhaust, etc.
It works really well.
Good luck!
JLK
09-21-2006 | 12:13 PM
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RE: Fitting a cowl
The best way to do it is to tape strips of cardboard (or other stiff material) to the sides of the fuselage and cut holes in them for the head, needle valve, Muffler, and anything else that you want access to. Make SURE that the cardboard strips are secured back on the fuse FAR ENOUGH so the cowl ca slip between the cardboard and the fuse.
Then remove the engine, slide the Cowl in place (Measuring the front opening to the firewall so the prop clears properly) and use the holes in the cardboard to mark the openings you need to cut.
Then remove the engine, slide the Cowl in place (Measuring the front opening to the firewall so the prop clears properly) and use the holes in the cardboard to mark the openings you need to cut.
09-21-2006 | 04:24 PM
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From: MERRIMACK,
NH
RE: Fitting a cowl
Hey Minn nice Ultimate. Just finished one myself and used this method for "cowl surgery".
Another poster in a different thread recommended using transparencies. This way you could see exactly where everything is.
Another poster in a different thread recommended using transparencies. This way you could see exactly where everything is.
09-21-2006 | 04:35 PM
#6
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RE: Fitting a cowl
minn has it right used this method on my U CAN DO and every cowl after. one thing though you want to start with the smallest hole possible so you can adjust in case something moves or slips you dont end up with some gaping hole for your needle valve or remote glow plug.
09-22-2006 | 07:41 PM
#7
RE: Fitting a cowl
Instead of butchering up your cowl, consider building an access door to hide all but the exhaust hole. I silver solder a socket head screw to the needle, and access it through the access door with an allen wrench to set the mixture. You can use a remote glow setup and not need a hole for your glow driver, The exhaust holes are best serviced as per the note from Minnflyer. Remember that you need at least 3 times an much cooling exhaust area as intake area.
Bill, AMA 4720
WACO Brotherhood #1
Bill, AMA 4720
WACO Brotherhood #1
09-22-2006 | 08:06 PM
#8
RE: Fitting a cowl
ORIGINAL: MinnFlyer
The best way to do it is to tape strips of cardboard (or other stiff material) to the sides of the fuselage and cut holes in them for the head, needle valve, Muffler, and anything else that you want access to. Make SURE that the cardboard strips are secured back on the fuse FAR ENOUGH so the cowl ca slip between the cardboard and the fuse.
Then remove the engine, slide the Cowl in place (Measuring the front opening to the firewall so the prop clears properly) and use the holes in the cardboard to mark the openings you need to cut.
The best way to do it is to tape strips of cardboard (or other stiff material) to the sides of the fuselage and cut holes in them for the head, needle valve, Muffler, and anything else that you want access to. Make SURE that the cardboard strips are secured back on the fuse FAR ENOUGH so the cowl ca slip between the cardboard and the fuse.
Then remove the engine, slide the Cowl in place (Measuring the front opening to the firewall so the prop clears properly) and use the holes in the cardboard to mark the openings you need to cut.
