Doris 3.5 chassis test run

[@stanislavdekanovsky1382]

Beautiful perfectly crafted models. If you are the author, a big compliment.

[@shamravkurane8145]

बहुत भारी अच्छा लगा

[@tonywright8294]

Excellent build .

[@MrErail]

Αφωνος! Υπέροχη!

[@rickydlayaute5387]

Magnifique!!👍😎🇫🇷🏁

[@WesleyHarcourtSTEAMandMORE]

Gorgeous engine

[@aymanMOHAMED-xz8oh]

Ples i.need details the bare dowen piston or steam engine maby two valves exhaust..thanks for you.

[@rodrigolopez9710]

Y como hace para invertir el jiro de las ruedas

[@kebakraba2005]

👍

[@nb.patadiya6035]

❤thekiu me jejaha dekhana chatata ❤❤❤❤❤ mejiro kalashhu muje taren banaa sikhanahe narotam bhai vali taren

[@sukho1345]

i still confuse about how to going backward and forward. what is simple explanation about that concept? 😅🙏🏻🙏🏻

[@CipiRipi-in7df]

First rule of a steam locomotive valve: the valve must follow 90 degree BEHIND the piston. So, the eccentric crank is set 90 degree behind the connecting rod. If you can somehow move the eccentric crank 90 degree AHEAD the connecting rod, the engine will run in reverse, as the valve must obey the above said rule. And 90 degree AHEAD become 90 degree BEHIND when engine act backward. This is achieved via the linkage between eccentric crank, expansion link, radius rod, lifting link, lifting arm and reverse bar.

[@sukho1345]

​@@CipiRipi-in7df thnx for explanation, sir.

[@CipiRipi-in7df]

@@sukho1345 ... if you remember, early locomotives, which used Stephenson, Gooch or Allan-Trick valve gear, had two eccentric cranks and eccentric rods (one 90 degree ahead and one 90 degree behind the connecting rod), both driving a single expansion link. And the reverse was done by sliding the radius rod along said expansion link, so that would be driven by one or the other of the eccentric rod. So, locomotive would go forward or backward, depending on which eccentric rod was used. Walschaert valve gear is a bit complicated but achieve the same result. :)

[@harrywijanarkosetyawan2270]

Maybe we can use electric motor to move 1 set and another 2 use to generate electricity back to the battery. It will be nice to see