Kolm 135 install in CARF Mustang
08-24-2016, 09:08 PM
#476
Well, the duct fan is a possibility,if you dont want to cut out a big whole downside to get tho hot air out. to build a working airflow with the original radiator is not easy, with small tubes as seen often it will not work.
my plan on voodoo is to bring fresh air fromthe front, and get the hot air out in the back. i think the inlet in the front is big enough for the carburators and cooling the engine.
Someone calculated how big the hole needs to be, just to bring enough air for the carbs. i will search for that ....
my plan on voodoo is to bring fresh air fromthe front, and get the hot air out in the back. i think the inlet in the front is big enough for the carburators and cooling the engine.
Someone calculated how big the hole needs to be, just to bring enough air for the carbs. i will search for that ....
08-24-2016, 09:31 PM
#477
You need three to four times the exhaust area compared to the intake. Plus the heat of the engine will promote flow through the compartment and the ducting.
I've seen photos of the corrugated black tube people have used to duct the engine. This is not efficient but it's convenient I guess.
I plan to make the area cross section of the ducting constant through the fuselage below the cockpit and then open up to the area of the exhaust outlet.
I've seen photos of the corrugated black tube people have used to duct the engine. This is not efficient but it's convenient I guess.
I plan to make the area cross section of the ducting constant through the fuselage below the cockpit and then open up to the area of the exhaust outlet.
08-24-2016, 09:54 PM
#478
Yes... the plan : outtake 4 times bigger then intake is well known. shoudl work , normally. but this is not always what it is in reallity.
on weekend i have seen a T28 1:1. we had time to talk with the mech an look to the plane an all parts in front for cooling. the truth is, the intake (as big as he engine) is MUCH bigger then the outlets. it works also, because of the baffling around the zylinders. AND: spoilers at the outlets.. that make it work.
and same you can use on RC planes. i think there are always many ways to make it work. your sucess you can see if you have temp-sensors on board.
at p51 maybe there are minimum 3 ways to do it.
i have seen :
Cooling from Carb side
Cooling from exhaust side
Cooling with duct fan from behinde
...and all of them worked. it depends on how much work you want to afford, how "Scale" it needs to be.....
on weekend i have seen a T28 1:1. we had time to talk with the mech an look to the plane an all parts in front for cooling. the truth is, the intake (as big as he engine) is MUCH bigger then the outlets. it works also, because of the baffling around the zylinders. AND: spoilers at the outlets.. that make it work.
and same you can use on RC planes. i think there are always many ways to make it work. your sucess you can see if you have temp-sensors on board.
at p51 maybe there are minimum 3 ways to do it.
i have seen :
Cooling from Carb side
Cooling from exhaust side
Cooling with duct fan from behinde
...and all of them worked. it depends on how much work you want to afford, how "Scale" it needs to be.....
08-24-2016, 09:56 PM
#479
You need three to four times the exhaust area compared to the intake. Plus the heat of the engine will promote flow through the compartment and the ducting.
I've seen photos of the corrugated black tube people have used to duct the engine. This is not efficient but it's convenient I guess.
I plan to make the area cross section of the ducting constant through the fuselage below the cockpit and then open up to the area of the exhaust outlet.
I've seen photos of the corrugated black tube people have used to duct the engine. This is not efficient but it's convenient I guess.
I plan to make the area cross section of the ducting constant through the fuselage below the cockpit and then open up to the area of the exhaust outlet.
you are right, the tube needs to be BIg ... and smooth inside. better way is a tunnel made of wood
08-25-2016, 09:41 PM
#480
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Space is a problem, next time I fly it I will see what the temp peaks at. From memory on the 1st flight we saw 160c, dont need to run it hard as there is plenty of power for the P51
08-30-2016, 06:25 AM
#484
Hi Tom, I haven't been able to find any pictures of this 56.6 mm extension being used. How much testing on the IL-135 do you think this extra long extension has had and have there been any issues or any extra installation guidance that needs to be followed?
08-30-2016, 07:47 AM
#485
I looked at the 150L again and they included an extra long prop hub in addition to the black one which is mounted on the engine to ship. So It does have the long and short prop hubs included.
The engine from firewall to hub face is 14 7/8 inches long, pretty long engine!
The engine from firewall to hub face is 14 7/8 inches long, pretty long engine!
08-30-2016, 08:37 AM
#486
I looked at the 150L again and they included an extra long prop hub in addition to the black one which is mounted on the engine to ship. So It does have the long and short prop hubs included.
The engine from firewall to hub face is 14 7/8 inches long, pretty long engine!
The engine from firewall to hub face is 14 7/8 inches long, pretty long engine!
08-31-2016, 01:43 AM
#487
tom
08-31-2016, 07:01 AM
#489
Ok, that helps confirm I should have also gotten the 57mm one too when I ordered the long engine version but didn't. At least I received a letter from Kolm this morning telling me they were going to machine an extension in the next few days. Frustrated is often a over used word but that's what I'm feeling...
08-31-2016, 09:10 PM
#490
Ok, that helps confirm I should have also gotten the 57mm one too when I ordered the long engine version but didn't. At least I received a letter from Kolm this morning telling me they were going to machine an extension in the next few days. Frustrated is often a over used word but that's what I'm feeling...
right, that part was missing. you will get it, no worrys
10-01-2016, 08:02 AM
#491
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Good morning! I just happen to find this thread, and was hoping to get some info regarding the KOLM IL150 installation in a CARF p51. So far I've seen some people successfully fit the engine with some obvious Mods. My main concern before I even get started, is just how loud the KOLM is? Obviously its going to be loud considering the design, but just how loud is it? Is it something that most clubs will IMMEDIATELY frown upon? Any help is greatly appreciated!
10-01-2016, 09:50 AM
#492
Good morning! I just happen to find this thread, and was hoping to get some info regarding the KOLM IL150 installation in a CARF p51. So far I've seen some people successfully fit the engine with some obvious Mods. My main concern before I even get started, is just how loud the KOLM is? Obviously its going to be loud considering the design, but just how loud is it? Is it something that most clubs will IMMEDIATELY frown upon? Any help is greatly appreciated!
Yeah, it's on the loud side but it's also on the four stroke cool as **** side so .... if you're club doesn't like it, go to a different club. I have the 135 and I can't think of anyplace I fly that would not accept it. Just don't have it so under propped that the prop 'rips' in flight and you should be fine. I wouldn't call a CARF P-51 a everyday kind of plane you can just fly at any small Podunk field near subdivisions in the first place so what I'd call a 'normal giant scale warbird suitable field' that you should be using, especially for a maiden flight with lots of runway length and width, you should be fine.
Have you seen this video? typical of the 'loudness'. go to 3:55 into the video and on through the flight. should be more than adequate for you to figure your question out.
https://www.youtube.com/watch?v=EoW08gzql0k
https://www.youtube.com/watch?v=NL1dMU6Hl5o&spfreload=1
Last edited by luckymacy; 10-01-2016 at 10:03 AM.
10-01-2016, 03:36 PM
#493
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haha. Definitely a cool engine! That's for sure. I think I may recognize your screen name. West Jersey member? Recently visited propstoppers field in Brookhaven pa?
-Ryan
-Ryan
10-01-2016, 04:17 PM
#494
http://www.buc-le.org/pictures.html
lucky
10-01-2016, 04:52 PM
#495
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Very nice! I think I may have seen your mustang in a recent post from Buc-le. Dual mustang flight?? I'm seriously debating the roto-motor FSI 130 3 cylinder as well. Have any thoughts on that brand? They sound incredible!
10-01-2016, 05:09 PM
#496
I've never heard of the brand. A reason why I got the Kolm besides the 270 timing sound factor was also because they made a cooling and mounting kit just for the CARF P-51 and they have a US distributor.
10-01-2016, 09:40 PM
#497
I maidened the mustang yesterday. Engine was fine, pretty rich, only got to 170. I have a big problem with some ignition noise. Elevators bounce to the rhythm of the idle. Lucky I didn't lose the plane on the first flight. At full throttle, they jump up and down. I'm using S-bus with a Robbe 2018. The plugs on the Kolm are the non-resistor type... ***??? I will swap them out and make sure the S-bus cable to the back of the plane is completely away from the battery that is running the ignition. Right now, all three batteries are in the tail and the S-bus wire may be too close, but doesn't explain what the rudder doesn't do it. Love that the electric starter fired the plane up right away after sitting for a year!
10-02-2016, 01:47 AM
#498
I maidened the mustang yesterday. Engine was fine, pretty rich, only got to 170. I have a big problem with some ignition noise. Elevators bounce to the rhythm of the idle. Lucky I didn't lose the plane on the first flight. At full throttle, they jump up and down. I'm using S-bus with a Robbe 2018. The plugs on the Kolm are the non-resistor type... ***??? I will swap them out and make sure the S-bus cable to the back of the plane is completely away from the battery that is running the ignition. Right now, all three batteries are in the tail and the S-bus wire may be too close, but doesn't explain what the rudder doesn't do it. Love that the electric starter fired the plane up right away after sitting for a year!
ps, maybe a easier test to do first would be to electrically remove the fuel pump/starter from the equation.
Last edited by luckymacy; 10-02-2016 at 04:38 AM.
10-02-2016, 02:20 PM
#500
https://www.youtube.com/watch?v=bKnf...s#action=share
here's a new video of a CARF Mustang and a Kolm 150. Yep, loud and proud. Kind of like a Harley motorcycle flying around the field. :-)
here's a new video of a CARF Mustang and a Kolm 150. Yep, loud and proud. Kind of like a Harley motorcycle flying around the field. :-)