BR 218 Donor: A note about

BR 218 Donor: A note about

Postby CSD » Sat Apr 07, 2012 4:29 pm

In reading some of the posts surrounding the use of the Tillig BR 218, it has come to my attention that a few of you may be under a misconception. Although the wheels, gear towers, motor, circuit board and other miscellaneous parts can be used, do not be fooled into thinking that the chassis is going to slip right into your project unit. You're going to have to build one yourself for a Geep style locomotive. For the F3: the prototype had 30' spacing between truck centers, however; the model works out to about 28', about a 5mm difference.

Here is a picture of the BR 218's guts:
fot13yj4.jpg


Here is what I had to do to use donor parts for one of my projects:
projekt-bobina-t157-120.html?hilit=bobina

Hope this helps.
Mark
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Re: BR 218 Donor: A note about

Postby Arseny » Sat Apr 07, 2012 4:58 pm

And
CSD wrote:For the F3: the prototype had 30' spacing between truck centers, however; the model works out to about 28', about a 5mm difference.


But what about ALCO FA? I wanted to use BR 218 as chassis for ALCO FA, not EMD F3.

According to the PVM's instructions, power chassis must have truck center distance 2.712 in... Very close to the BR 218...
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Re: BR 218 Donor: A note about

Postby CSD » Sat Apr 07, 2012 5:20 pm

Should be pretty close. I think the FA is 27'9" off the top of my head.

I just wanted to add a note about these two scenarios as I myself have recommended it's usage and have seen it come up a few times recently.
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Re: BR 218 Donor: A note about

Postby areibel » Sat Apr 07, 2012 6:33 pm

According to the drawings I have, the FA-1 wheelbase is 27 '2", the FA-2 is 29' 2", and the actual car body length difference is between the trucks. Th PVM FA is based on the Kemtron which doesn't match either right on- it's about 50 feet overall, which puts it between the FA1 and FA2 (almost exactly splits the difference!). I'd bet that back in the 50's Kemtron decided to make a hybrid that could pass for either, so it looks like the BR chassis could work for either too.
One question though- what is the actual wheelbase of the trucks (between the axles)?
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Re: BR 218 Donor: A note about

Postby ConducTTor » Sun Apr 08, 2012 12:50 pm

The distance between BR 218's truck centers is 72mm. This works out to 340 inches. The FA's is given as 438 (36 feet, 6 inches) on "thedieselshop" website. That's a massive difference which rules out the 218 chassis. Although, putting PVM,s shell on top the chassis it doesn't look bad. Somebody wanna double check my measurements/math?
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Re: BR 218 Donor: A note about

Postby Arseny » Sun Apr 08, 2012 1:01 pm

But 36 feet 6 inches gives us 3.65 inches in 1:120 scale.
While PVM's intructions require power chassis with the truck center distance 2.712 inches.... :think:
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Re: BR 218 Donor: A note about

Postby ConducTTor » Sun Apr 08, 2012 1:03 pm

Arseny wrote:But 36 feet 6 inches gives us 3.65 inches in 1:120 scale.
While PVM's intructions require power chassis with the truck center distance 2.712 inches.... :think:


I didn't notice what's on the instructions.......something's definitely wrong somewhere. That's a full inch of difference - in 1:120! :wtf:
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Re: BR 218 Donor: A note about

Postby CSD » Sun Apr 08, 2012 1:15 pm

ConducTTor wrote:... The FA's is given as 438 (36 feet, 6 inches) on "thedieselshop" website...

That website uses some interesting terminology. What they call truck centers is not the truck center to center measurement, which is what they refer to as bolster. so the FA is 29'2".

I ran into this when I was doing the GP7/9 where they stated the centers where 40' (wrong), but the bolster was listed at the correct 31'.
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Re: BR 218 Donor: A note about

Postby ConducTTor » Sun Apr 08, 2012 1:44 pm

I've seen some other questionable numbers on their site. Does anyone have a more dependable source of info on this?
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Re: BR 218 Donor: A note about

Postby ConducTTor » Sun Apr 08, 2012 1:56 pm

Ok I got it. MR's Cyclopedia volume 2 "diesel locomotives" gives the truck centers at 27'2" (not 29'2"). So it's 346 inches with the BR 218 coming in at 340. The difference in TT is 1.27mm which I think is livable. So there you go. Get a BR 218 and have at it!
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