NICKELUP

My Feedback: (82)

Dr scolds what happened to your mustang? How did you damage it?

Hello82

hey tom

I need trim this top black cooling fin cover back about 3-4 mm, corner only, of KOLM 230

no worries.... or?????

Hope Joe Nall is a blast!







thanks Matt

junglejet

Hi Guys, anyone know what cylinder temp I can expect on the Kolm 135? I have been getting over 150c (300f) on the rear cylinder and I am concerned that might be too hot.

banjbob1

I'm getting 100-125c on the rear cylinder with the engine open to the air so 150c might not be to bad if thats it cowled in.

luckymacy

The engine is about 4cms (290 vs 340 mms in the photos) short based on where the cooling kit firewall fits. Just eyeballing how much I'd have to trim off to make it be possible to slide the firewall forward to make the engine clear the cowl seems questionable so I'm wondering if others had the same issue and what you did about it. I hope I did get the long engine! I noticed a fair number of builders just completely cut open the top of the fuselage when they mounted their firewall and I think maybe this was one of the reason why, to make it easier to get the firewall to fit without cutting it up so much.

Also, did anyone find a source for the 'ISB' box, the box they were working on that combines the starter motor's ESC and the on off switch and battery regulator for it?

thx,
lucky

DrScoles

My Feedback: (18)

Lucky, I still question whether or not I got the right engine. I had to butcher the install kit Kolm makes to get everything to fit. If front part( no idea what to call that part of the motor) was a little longer, would have been much easier to adapt the kit. These pics are of the plane with the rubber mounts, HIGHLY recommend switching to metal spacers front and back.

luckymacy

I think our mounting kits were really meant for the longer 3 cylinder 150s they were selling at the time.

luckymacy

Update. if you are trying to make this engine work on the mustang and also coming up short hold the presses....

Johann Kolm emailed me this morning after I sent him the same pictures I post above and he responded that they have a longer extension for the CARF-Mustang. Maddening...I couldn't have been more explicit when I placed the order. Well, I'm going to get the correct prop extension instead of trying to make the wrong one work. Not only will it help out tremendously with the overall CG and allow the firewall in the mounting kit to work but it'll also allow more clearance around the engine starter motor and the cylinder heads. Yes, this was a real failure somewhere. What else could they have possibly thought when we ordered the LONG version of the engine for the CARF Mustang in the first place...

There's also an 'ISB' box that combines support for the newer fuel pump, a killswitch, and an ESC for the starter motor and only uses one channel on the Rx. So you can combine the battery for the fuel pump and the engine starter motor and regulate the power output correctly to each device. That you can't get from Kolm. Order it from Thomas Gass directly as I otherwise couldn't find a website to do so from.

DrScoles

My Feedback: (18)

This is really disappointing, Kolm has seen these exact pics and commented on them. I made it clear when ordering the motor that it was for the CARF Mustang. Altering the mounting kit wasn't the end of the world, its the CG that I would have liked to control better. I had to add a ton of lead to the tail to balance this plane. Moving this thing back another few CM even would have been helpful. I guess this is what happens when we purchase something from Europe through a distributor. Too many opportunities for error.

DrScoles

My Feedback: (18)

Lucky, I did not cut the top of my fuse, really wanted to keep it intact for strength. It wasn't too painful to figure out. I laid up 6oz carbon from the firewall back to the cockpit internally. I think that must have helped, when I crashed, it snapped the tail off and destroyed both wings, but the front end was pristine.... ;-) If I had damaged the front end, I would have trash canned the plane. I put way too much work into mounting the Kolm and making it look pretty to let losing a tail and set of wings set me back!

Chris Nicastro

My Feedback: (3)

Well this is a good update for me too. I'm at the point of starting to install the 150 with starter. I will email and talk with Dr Gotz to get an updated hub or whatever they have now.
In addition, there was talk of a scale exhaust for this combo, has anyone seen or heard of this lately?
I don't want to install the scale static exhaust if the working version is near release.

Ixtrim

Hola :-)

I can see, you guys are going on with installation. All of you are right, the IL 135 (now 155) is a problem in the mustang. it is a little bit to high (if you dont want to see the engine commin out downside)
The IL150 fits as it is. no special parts needed. hope everyone of you get the parts you need, if not you can contact me, i will help you as good as possible.

If someone here is reading all this, i want to say something about Mustang and Engine:

If you want a Badass engine and dont care about the price use a IL150
If you want a perfect fitting engine with cool sound fo less money, use a IL100. i had this engine in my BF109, 100 inch and 21 Kilos and it was still powerful enough. i have a video of that in my youtube channel where you can see the performance of the "Smaller" 2zylinder.
less wheight and stress ;-)

for sure IL135 is also good, but a little bit more difficult to install, and the new IL155 is 3mm higher i think .

greets
Tom

Chris Nicastro

My Feedback: (3)

Thanks Tom,
Im going to install the 150L with starter for best fit and hope there is no need for an opening underneath.

Also, any updates on the scale exhaust system?

Thanks!

DrScoles

My Feedback: (18)

I'm going with the 100 twin at 270 for the CARF spitfire when I build it. My 135 was is way way more than enough motor for the mustang, I'm sure the 100 will be fine with the spit.

junglejet

Guys, I am still keen to know what cylinder temps you have been experiencing with the 135 engine installed

Chris Nicastro

My Feedback: (3)

I have not run the 150 yet but for comparison I run my other gas two or four stroke engines between 165-185F measured at the exhaust side of the head.

Ixtrim

Mornig!

So, it will fit :-) if not we can use the extender with 56.6mm legh. but i checked it on my "Voodoo" and it looked good.
At the moment i heard nothing from scale exhaust system. but i can ask whats going on with that!

Tom

Ixtrim

Right, but in Spitfire you need the wheight in the Nose. and there is much more space than in Mustang. so, take the electric start system. much better then lead :-)
Or the new 155... you can turn a big Prop with that. at the moment i do Tests with the adjustable "Varioprop". that looks perfect!!!

tom

Ixtrim

160 Celsius is max. if you have more, check your cooling system. 180 and more is the point of no return :-)

Chris Nicastro

My Feedback: (3)

On the temp question Tom that's 320 to 356 degrees F! Is that correct?
Seems way too hot to me that's why I'm asking to confirm please.

john534

Hi Chris, just my two cents, but all my four strokes I shoot to be under 250F... Ideal is around 220.

John

Chris Nicastro

My Feedback: (3)

Ok granted but that's still 100 degrees less than what Tom stated was ok. So just being clear that seems way to hot and for those who have Kolm engine experience I'd like to confirm the temp range.

I like running my engines under 200F but without an EGT sensor I'm just judging by plug color and performance.

Oh by the way LOVE the reduction drive CARF P-51 project. Looks amazing how did it fly and work out after all?

Ixtrim

Right, what i say is 300F.

So, my boxers run at 250F. here is it easier to build a good working baffling.
The inline-Engines go up to 300 - not only mine, also these from the guys here around - and for sure thats OK for the engines.


Tom

Craig B.

Small ducted fan in the firewall mate. Put it on an esc and dial up the speed to draw cool air through.

Chris Nicastro

My Feedback: (3)

Wow, ok, pretty hot then.
Im going make a duct from the back of the firewall to the belly radiator exhaust so this plane has constant air flow. There's a chance to add an EDF unit if needed but I doubt it. I made baffles for a fully cowled pair of DLE 35RA's in a P-38 and they work really well. With the stock inlets and exhausts the engines run great.
Ill post pics later on