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Discussion Boards => HO => Topic started by: RFP72 on October 26, 2008, 07:17:47 PM

Title: Turn radius - HO
Post by: RFP72 on October 26, 2008, 07:17:47 PM
My layout has 22 inch radius curves. I want to get a nice loco for Xmas, but I am hesitant to purchase anything that requires larger radius curves.
I am looking at Bachmann Spectrum trains with DCC and Sound:
     USRA 2-10-2 #83802
     2-8-0 Consolidation #84503
     4-8-2 Heavy Mtn #84203
     2-6-6-2 #84803
     2-10-0 Russian decapod #84305
     4-6-0 #84904
     4-4-0 Richmond #85103
Any help is appreciated!
Title: Re: Turn radius - HO
Post by: ajp3751 on October 26, 2008, 07:26:30 PM
All of the locos you listed will run on 22' radius. The larger ones, (2-10-2, 4-8-2, 2-6-6-2) will rn fine but won't look as well as a 2-8-0 or 4-6-0. If you have 22" radius track, you probably don't have a lot of long straights to run long trains, so smaller ones will look better. I have a 2-8-0 and love it. Have fun with your new purchase.
Title: Re: Turn radius - HO
Post by: SteamGene on October 26, 2008, 07:35:03 PM
What is the layout size?  And yes, wider is better, no question.  Even 32" curves gets a lot of swing off a Spectrum USRA light Mallet, though it's not as noticeable with the 4-8-2s.  In any event, a small layout really needs small power to look good.
The Spectrum 2-8-0 is always a safe bet.
Gene
Title: Re: Turn radius - HO
Post by: grumpy on October 27, 2008, 12:01:39 AM
I have all the locos in your list and all my curves are 18" . The best one is the 2-8-0.
Don
Title: Re: Turn radius - HO
Post by: SteamGene on October 27, 2008, 09:38:29 AM
Pacific Northern,
The whole purpose of an articulated, is to get a big locomotive to go around a tight turn.  As far as the wheels are concerned, a 2-6-6-2 is made by bashing two Moguls back to back( 2-6-0 + 0-6-2).  Note the SP designation "AC" for "Articulated Consolidation" for its 2-8-8-X locos.
Gene
Title: Re: Turn radius - HO
Post by: Yampa Bob on October 27, 2008, 11:38:16 AM
A brief review from "The Mad Scientist".

I only have 4 Bachmann steam locomotives, but they are all Spectrum 2-8-0, perfect for my 18" curves.

I run one regularly, one is being bashed into a tank switcher, one stretched into a quasi-Mikado, and one still in the box for backup/parts scavenge. That's how I earned my nickname.  :D

I agree the "Connie" is a great little locomotive, reasonably priced so I don't mind taking a saw to one.
Title: Re: Turn radius - HO
Post by: RFP72 on October 27, 2008, 08:29:31 PM
Thanks to all who responded with such great information.

My layout is 8ft wide x 14ft long, with a 4x8 hole in the middle.
I prefer N&W, Southern, RF&P, C&O or other SE railways.

Thanks again. Now I have to choose which to get!
Title: Re: Turn radius - HO
Post by: Frisco on October 27, 2008, 10:15:20 PM
Those are all very nice locomotives. However the 2-10-2, 2-6-6-2, and        4-8-2  will look very bad going around 22" curves. The 2-10-2 will not run really good on these curves.
Title: Re: Turn radius - HO
Post by: ajp3751 on October 27, 2008, 10:46:20 PM
the spectrum 2-8-0 and 4-4-0 come is southern and look nice. I would buy them if i didn't already model another part of the country. Also (although not spectrum) there is a southern green 2-6-2 that is decent and a small engine. The light mountain was a nice loco, and was also is the southern paint, but only now to be found on ebay or swap meets. The N&W and the C&O had alot of larger motive power so they might be harder to model on 22" curves (possible but not beautiful). The c&o mountain, the n&w J class, and the southern santa fe class will run but may have more overhang than desired, but will still run. Remember as well the planned rolling stock for these engines as longer coaches are not good and super long freights aren't need on a small layout. Several short consists are what you should look for.
Title: Re: Turn radius - HO
Post by: Joe Satnik on October 28, 2008, 08:39:10 AM
Dear RFP72,

You said:
"My layout is 8ft wide x 14ft long, with a 4x8 hole in the middle."

Sounds like an around the room layout, 2' wide on the long sides and 3' wide on the ends. 

Good choice.

Have you considered filling in the inside corners of your benchwork to follow the curves of your track?

The math in this previous post of mine may be helpful to you, though it is for making a full curved corner piece, not just an inside "fill" for an already existing 90 degree corner. 

http://www.bachmanntrains.com/home-usa/board/index.php/topic,6808.0.html

Another option: Fashion triangular fills by cutting 12"x12" square pieces of plywood from one corner to the opposite corner.

Hope this helps.

Sincerely,

Joe Satnik 
Title: Re: Turn radius - HO
Post by: Frisco on October 28, 2008, 08:15:53 PM
Quote from: Pacific Northern on October 28, 2008, 02:51:09 PM
Quote from: Frisco on October 27, 2008, 10:15:20 PM
Those are all very nice locomotives. However the 2-10-2, 2-6-6-2, and        4-8-2  will look very bad going around 22" curves. The 2-10-2 will not run really good on these curves.

Check the review by Model Railroader for this engine.  Engine runs fine on 18" curves, does not look that great but runs fine. Are you giving your opinion/guess or do you actually have a Spectrum 2-10-2?


No, I don't have it but do have this quote from the June 2006 Model Railroad News. "It simply couldn't get that long driveline around 18-inch curves, which didn't surprise me, 21 inches was too tight. At 24, the drivers got around but the pilot truck kept hopping off. I was patient, hoping it was a poor bit of track work, but it kept tossing the front truck off to the outside with a train; running light, it managed the deed. It also slowed down noticebly as it entered 24-inch curves,indicating some protest. At 27inch radius curves, it only slowed some."                                 If you ask me that means 27" is a good min radius.
Title: Re: Turn radius - HO
Post by: grumpy on October 29, 2008, 01:23:46 AM
Frisco
I have all those locos and they all run fine on 18" curves .They may not look good to a rivet counter but they look good to me and it is my railroad.
Don
Title: Re: Turn radius - HO
Post by: Pacific Northern on October 29, 2008, 06:45:59 PM
Quote from: Frisco on October 28, 2008, 08:15:53 PM
Quote from: Pacific Northern on October 28, 2008, 02:51:09 PM
Quote from: Frisco on October 27, 2008, 10:15:20 PM
Those are all very nice locomotives. However the 2-10-2, 2-6-6-2, and        4-8-2  will look very bad going around 22" curves. The 2-10-2 will not run really good on these curves.

Check the review by Model Railroader for this engine.  Engine runs fine on 18" curves, does not look that great but runs fine. Are you giving your opinion/guess or do you actually have a Spectrum 2-10-2?


No, I don't have it but do have this quote from the June 2006 Model Railroad News. "It simply couldn't get that long driveline around 18-inch curves, which didn't surprise me, 21 inches was too tight. At 24, the drivers got around but the pilot truck kept hopping off. I was patient, hoping it was a poor bit of track work, but it kept tossing the front truck off to the outside with a train; running light, it managed the deed. It also slowed down noticebly as it entered 24-inch curves,indicating some protest. At 27inch radius curves, it only slowed some."                                 If you ask me that means 27" is a good min radius.

There definetely is a story associated with that particular review.......... would not even work on 24" radius.
Title: Re: Turn radius - HO
Post by: Frisco on October 29, 2008, 07:49:46 PM
Well I trust them and I don't trust Model Railroader Reviews.
Title: Re: Turn radius - HO
Post by: grumpy on October 30, 2008, 12:21:45 AM
Frisco
The no. of us who commented on the 2-10-2 being able to handle 18" curves should be enough to convince you. We all have the loco.
Don
Title: Re: Turn radius - HO
Post by: Frisco on October 30, 2008, 09:18:14 PM
I don't not trust you. However I have found that different locomotives even if they are the same locomotive(like the 2-10-2) will sometimes and sometimes not operate on the same radius track. This might have something to do with my track although I doubt it because I use EZ track on a flat floor. I have found that I usaly get the same results as Model Railroad News does so they are who I refer to for product reviews.
Title: Re: Turn radius - HO
Post by: Pacific Northern on October 31, 2008, 03:26:00 PM
Quote from: Frisco on October 30, 2008, 09:18:14 PM
I don't not trust you. However I have found that different locomotives even if they are the same locomotive(like the 2-10-2) will sometimes and sometimes not operate on the same radius track. This might have something to do with my track although I doubt it because I use EZ track on a flat floor. I have found that I usaly get the same results as Model Railroad News does so they are who I refer to for product reviews.

Frisco, I have had trouble with EZ track.   I had a temporary layout/test track in which I had a 18 oval inside a 22" oval.  I had problems with the track moving out of alignment to the point a Spectrum 4-4-0 kept jumping the tracks on both ovals. 

Over a short period of time the track had become out of gauge and there were also small kinks that needed to be re-aligned.  I ended up having to hot glue the track in place to keep it flat and keep from moving.  Especially around the turnouts. 

Once I had my permanent benchwork completed and started that layout the track problems were solved.  I even had sections of EZ track that needed triming in order to mate without spaces in the track joiners/fasteners.



Title: Re: Turn radius - HO
Post by: Frisco on October 31, 2008, 05:32:13 PM
Thanks, just a couple more months before I get to start my first layout. :)
Title: Re: Turn radius - HO
Post by: ebtbob on November 02, 2008, 08:23:14 AM
Good Morning All,

      Forgive me if I duplicate anyone's info here as I only skim read your posts on this thread.
      First of all,  let me address reviews.   As far back as I can remember,  Model Railroader magazine has only done one negative review in all the years(over 40) that I have read that mag.    If you want to get - what I consider - honest reviews,  both good and bad,  then get a copy of Model Railroad News. 
       Now as to engines and curves.    It has been my experience that once you read advertising that states a minimum radius,  automatically add two inches to that miniumum.    Then look at the wheel base of the engine you are considering.   Other than a 2-8-2,   anything with 8 to 10 drivers in a fixed base,  add 4 inches to that minimum.   If an engine is articulated,   add two to be safe.
       We have been experimenting with the newly released,  Pennsy I1 - a 2-10-0 that Precision Craft claims will go around 18 inch radius.  Well....I don't know how they tested that engine to come up with that minimum radius,  but don't believe it.   
At 22r,  the engine struggles,  especially those with the long haul tender.   In many cases,  the problem with engines like the I1 is not that the wheels can handle the turn,  it is the fact - on a tight turn the cab and tender can and will make contact forcing something to derail.   The PC I1 is a GREAT looking and operating engine,  but you really need 24 inch radius for good performance.

Bob
Title: Re: Turn radius - HO
Post by: Frisco on November 02, 2008, 11:08:33 AM
Quote from: ebtbob on November 02, 2008, 08:23:14 AM
      First of all,  let me address reviews.   As far back as I can remember,  Model Railroader magazine has only done one negative review in all the years(over 40) that I have read that mag.    If you want to get - what I consider - honest reviews,  both good and bad,  then get a copy of Model Railroad News. 
 

Bob
Thank you for saying this. My feelings exactly.