Lokomotiva na svoz dřeva modelové železnice v měřítku HO pro železniční modeláře v modelářské kvalitě - HR2883S Rivarossi Northern Redwood Lumber Co. #4 HO 2-Truck 0-4-4-0 Heisler Logging Steam Locomotive DCC & Sound, .

Velká univerzálnost tohoto typu lokomotivy z něj učinila rozumnou volbu i pro použití v přístavním provozu; na obslužných tratích, které spojovaly ložiska i s vnějšími městskými oblastmi. Další časté využití této lokomotivy bylo ve skutečných lesích, kde se prováděla těžba stromů.

Existuje třívozová lokomotiva s přidaným tendrem, tedy se třemi poháněnými podvozky. Tím se zvýšila trakce oproti původní verzi se dvěma podvozky, aniž by se zvýšila měrná hmotnost na nápravu, což je důležitý detail, který umožňuje průjezd lokomotivy po mostech, viaduktech a tratích s omezeným poměrem rozchod/náprava/hmotnost.

V lokomotivě jsou všechny dva podvozky poháněny převodovkou s vnějšími táhly jako v originále. Všechny převody jsou funkční; stejně jako lampy, jedna na čele kotle a druhá na střeše kabiny.

Z "převodovkových" lokomotiv existují tři typy: Shay, Climax, Heisler. Všechny mají "těleso" kotle, kabinu strojvedoucího a uhelné a vodní úložiště, vše na jednom podvozku s převodovkou na kola, odtud název "ozubnicová lokomotiva".

Parní stroj se u všech tří modelů liší, stejně jako jeho umístění na podvozku. V každém případě se jedná o lokomotivu s vysokými otáčkami, která je spojena převodovkou s převodem na redukci a pohonem hnacích kol, která jsou menší velikosti než obvykle, a protože jsou poháněna všechna kola, vzniká tím vysoký trakční výkon, nízká rychlost a lokomotiva má vynikající trakční přilnavost. Lokomotiva je proto ideální pro tratě s velkým sklonem, úzké zatáčky a klikaté koleje, kde by normální lokomotiva s tuhým podvozkem a hlavními hnacími tyčemi nemohla fungovat.

U typu Heisler leží skříň lokomotivy na dvou nebo třech podvozcích se čtyřmi koly na každém z nich, motor je umístěn uprostřed se dvěma válci v uspořádání V 90°. Hlavní převodový hřídel je umístěn podélně k podvozku , a umožňuje pohyb lokomotivy prostřednictvím kloubového převodového hřídele, který pohání kuželové ozubené kolo na korunovém pastorku uprostřed náprav na každém z podvozků. Tato náprava pohybuje vedlejší nápravou prostřednictvím táhel na vnější straně kol.

American Geared Locomotives - Historical Background:

Driving normal fixed frame locomotive on logging railways was virtually impossible. The irregular underground made the wheels come off the track and derailed the locomotive. One of the solutions to this problem, among the more numerous Shay and Climax was the Heisler.

The Heisler distincts itself by its V-shaped two cylinder steam engine, driving a central crank shaft which on its turn drove one axle of each powered truck. The other axle was driven through a conventional rod.

Like so many technological advancements, invention is often derived from need. These interesting geared locomotives were conceived and designed by men working on site and looking for better ways to transport logs as quickly as possible on temporary rails over rough terrain. Ephraim Shay was one of these men and the story starts with him.

The Heisler Locomotive:

The first locomotive of the Charles Heisler design was built in 1891 by the Dunkirk Engineering Company. The design was patented by Charles Heisler in 1892.

The Heisler consisted of 2 steam cylinders positioned in a "V" under the boiler about 3/4th the way back from the front. The piston rods came out of the cylinders and attached to a "crank shaft" located under the centre of the boiler. Attached to either end of the crank shaft were drive shafts. The drive shafts were located below the centre line of the engine. On the two truck models, the drive shaft attached to a gear box located on each truck s wheel set that was located furthest from the centre of the engine frame. Power was then supplied to the other wheel set on the truck with an outboard tie rod connecting two wheel sets together. This tie rod is readily visible in the picture above.

In terms of speed, it was the fastest of the 3 most prevalent geared steam locomotives depicted here. It also had the fewest numbers manufactured of these type of locomotives.

Models with either two or three truck sets were manufactured. The three truck models were used on those engines that required more power and more fuel. The third truck was powered and carried a tender (similar to those on "rod" engines) to carry additional fuel and water.

Rivarossi produced two Heisler Locomotive models, a two truck and a three truck version.

The Bachmann HO scale range consists of HO scale models from North America. HO are 1/87 scale models, running on the same 16.5mm track gauge as OO scale models. The Spectrum range are also HO and N Scale American prototypes but feature a greater level of detail and improved mechanisms.

Rivarossi has produced the Heisler in two truck wood burning and oil burning models with the following liveries: McCloud River, Georgia Pacific, Coos Bay Lumber, West Side Lumber Co., Potlach, Pickering and Boise Cascade. The model was produced as a three truck model for Lehigh Navigation Coal Co, St. Regis Paper Co. and Cass Scenic Railway.

Rivarossi Two Truck & Three Truck Steam Heisler HO Scale:

These models were first produced in the 80s and then updated at the end of 2002. In 2003, Lima was forced into liquidation and in October 2004 Hornby acquired the assets of Lima, including Rivarossi.

These Rivarossi models, produced in the early 2000s are made with an all-new body that completely eliminates moulded-on detail. All of the piping, sand lines, air lines, and more are separate details. Blackened wire grab irons and handrails add to the realistic effect. There is also a solid-brass whistle, pop valves, bell, front number plate and photo-etched builders plates. And check out the other new features like flush-fitting cab windows, optional headlight styles and working knuckle couplers.

Inside that beautiful body lurks a tough, new drive that works like a real Heisler! A can motor and new gearbox are connected to a super replica of the V-2 "motor engine," so the crankshaft, rods and valve gear move like the originals.

Driveshafts transmit power to solid-metal worm gears on one axle, and side rods power all of the wheels just as the prototype did. Best of all, the models are DCC-ready so you can plug in your favourite decoder and start running.

A larger weight and an optional traction-tire-equipped driver set are included to improve pulling power. Plus, the trucks have been carefully engineered to provide all-wheel electrical pickup and still take incredibly sharp curves with ease.

Perfect for any industry from logging to coal mining to industrial switching these new models are offered in both 2 and 3 Truck versions. Each is fully assembled and factory painted. Various road names are available.

The Rivarossi 3 Truck model depicts a large standard gauge three truck machine, and is quite impressive.

The underlying shell is enhanced with many added details- fine black wire handrails, coupler cut bars, air brake pump, reservoir, and piping, with the smoke box number plate, bell, whistle and safety vales in brass.

The working motion is a treat and the model is powered from a motor in the cab and bunker which drives the trucks using the central drive shaft with universal joints, as per proto type; the gearbox is hidden in the firebox. The loco sports a good plain satin black finish with dark graphite smoke box.



PLEASE NOTE: Due to the small edition size and the great demand for this item, allocations are expected to occur.

UPOZORNĚNÍ: TITUL JE VYROBENÝ V OMEZENÉM MNOŽSTVÍ JAKO UMĚLECKÝ PŘEDMĚT. UVEDENÁ PRODEJNÍ CENA JE PLATNÁ DO VYPRODÁNÍ TUZEMSKÝCH ZÁSOB.

Sdílet na Twitteru Sdílet na Facebooku