Moottoripornoa ja -experimenttaalia

[LPR]

Tuollainen Meteor on kyllä hieno kone. Paukepäivillä olen moisen nähnyt ja kuullut tulilla. Tuttu oli käyttöpäällikkönä.

[Harri S]

Jossakin ketjussa oli tarinointia noista Zwezdan M503 jne. dieseltähtimoottoreista ja taisin laitella sinne juttua Tuimaluokan ohjusveneistä joissa oli noita 56 sylinterisiä M504 dieseltähtimoottoreita kolme kappaletta.
Hurjin Zwezda versiohan on voimalamalli "507" jossa noita 56 sylinterisiä oli kytkettynä kaksi peräkkäin.

https://oldmachinepress.com/2016/09/05/yakovlev-m-501-and-zvezda-m503-and-m504-diesel-engines/

Mainitsin siinä että merellä havaitsi ensiksi savupilven ja vasta sitten ilmestyi Tuima taivaanrantaan.
No nyt löytyi FB:sta kuva joka on otettu Tuima-luokan ohjusveneestä kun kolme M504 konetta on käynnissä ja 15500 hevosvoimaa hörpöttää.
(Kuvat: O Suominen)

[Gary Grand]

https://www.macsmotorcitygarage.com/a-quick-history-of-the-gmc-6-71-blower/

[Gary Grand]

Vähän perusteellisempi tutustuminen Chrysler Turbine car:n kehitykseen.

[Mopo-Ukko]

Jossakin ketjussa oli tarinointia noista Zwezdan M503 jne. dieseltähtimoottoreista ja taisin laitella sinne juttua Tuimaluokan ohjusveneistä joissa oli noita 56 sylinterisiä M504 dieseltähtimoottoreita kolme kappaletta.
Hurjin Zwezda versiohan on voimalamalli "507" jossa noita 56 sylinterisiä oli kytkettynä kaksi peräkkäin.

https://oldmachinepress.com/2016/09/05/yakovlev-m-501-and-zvezda-m503-and-m504-diesel-engines/

Mainitsin siinä että merellä havaitsi ensiksi savupilven ja vasta sitten ilmestyi Tuima taivaanrantaan.
No nyt löytyi FB:sta kuva joka on otettu Tuima-luokan ohjusveneestä kun kolme M504 konetta on käynnissä ja 15500 hevosvoimaa hörpöttää.
(Kuvat: O Suominen)

Omasuoja koko ajan päällä

[LPR]

Napier Deltic olisi kiinnostava moottori tutustua. Suomessa niitä oli ainakin Vasama-luokan moottoritykkiveneissä.

https://en.m.wikipedia.org/wiki/Napier_Deltic

[Harri S]

The Junkers Jumo 223 was an experimental 24-cylinder aircraft engine based on the Junkers Jumo 205. Like the Jumo 205, it was an opposed piston two-stroke diesel engine. It had four banks of six cylinders in a rhomboid configuration, with four crankshafts, one at each vertex of the rhombus, and 48 pistons. It was designed for a power of 2,500 horsepower at 4,400 rpm, and weighed around 2,370 kg.

Only one example is known to have been built.[citation needed] It is rumored to have been taken to Moscow at the end of World War II, where development may have continued. The engine was contemplated for use in the four-engine Messerschmitt Me 264 long-range bomber, https://planehistoria.com/me-264-amerika-bomber/

[Harri S]

Tuommonen pentastar:

[Gary Grand]

Tässä ratsastetaan määrällä..



Chevyn isolohkoja vuodelta 1966, Tonawanda engine plant 

[Gary Grand]

Isolohko vs. isolohko + pumppu

https://www.onallcylinders.com/2024/05/01/big-with-boost-a-blown-big-block-chevy-build/

[Anza]

Mercedes Benz T80 V12 vuodelta 1939
44,5 l
3000 hevosvoimaa
740km/h

https://en.m.wikipedia.org/wiki/Mercedes-Benz_T80

[Gary Grand]

Mopar ram induction

David J Davis

Well, let's unpack this a bit as there is, in fact, a bit of throwin' z bull around.
The term "Ram," which Chrysler has resurrected in their efforts to sell vehicles based on legends of old, originates from a informal group of Chrysler motor men who pitched in THEIR OWN time and effort and money to go racing and experimenting to find out what worked and what didn't. They were willing to think outside the box, and they were SUCCESSFUL. This ORIGINAL team came to be called "The Ram Charger boys."

"Ram Charger" came about as a result of experimentation with intake runner lengths. No, they didn't run back and forth to the plant and cast a different intake manifold every day. Nor did they custom make their trial intakes using sheet metal. They made base plates for four barrel carbs to which they could attach radiator hoses, as well attaching plates to the heads which also accepted radiator hose pipe. From there they simply experimented with different lengths.

What they found, as expected, was that by using tuned lengths which complemented the torque curve of the camshafts they were also experimenting with, there was a point of "resonance" whereby the speed and frequency of the intake pulses actually created a light supercharging effect. Volumetric efficiency was calculated to be in excess of 103 percent at torque peak.

The knowledge learned was brought to the design room where it was thought it could be turned into an advantage over the competition. This predates the all out musclecar effort and was used to address large heavy cars which WERE capable of higher speeds, but because of size and weight were not quick to accelerate in the one scenario where most mature drivers would actually like to be able to scoot. PASSING. Specifically, passing on the superhighways of the late 50's and early 60's.

The mockups used on the drag strips using radiator hose had two four barrel carburetors so high above the engine as to exceed the roof line. Not practical on the street. So, the length was first determined such that the "Ram Charging" effect would come into play when one was traveling the highway speed limit and then stepped on the gas hard enough for the transmission to downshift to second, or, "passing gear." Then the lengthy runners were FOLDED DOWNWARD such that the rig would fit under the hood. From this the manifolds were cast. These cars weighed WELL in excess of 4000 pounds, but acceleration at speed was dramatic. Or so it had been described in advertising and critical magazines of the day.

BUT!!!!!!!! There is NO SUCH THING AS A FREE LUNCH. In this case, I'm not just talking about fuel economy. Tuning an engine in this way will result in more torque developed at and around a designed in RPM, but only for a narrow range. Above and below that range torque is invariably lost. This is always the case with normally aspirated engines. You can increase volumetric efficiency by changing any one or more of a number of factors which determine how much horsepower an engine is ultimately able to develop, but in doing so for a particular target RPM range (for instance, low rpm for practicality on the street, or high rpm for racing at Talladega) you will end up sacrificing outside that target.

The Ram intakes were somewhat problematic, especially in cold weather starting. Raw fuel would pool at the low points in the intake runners causing hard starts and rough idling until heat finally warmed up the intake manifolds enough to keep the fuel gaseous (evaporated). The manifolds were also prone to cracking from their own weight. Recently, though, on the popular youtube channel "Nick's Garage," a classic mopar restorer, he ran a a big block with the old Ram manifolds and was himself amazed at the torque the motor produced. I believe it was over 600 foot pounds. Easy enough to find, though, and a fun watch.

[Gary Grand]

Ilmapumpusta ahdin RiksRattoriin..