https://www.youtube.com/watch?v=M02Sy2HxeRQ
.
Printable View
Well I've spent lots of the day trying to run down the reason for the axle specs for C-clip axles and about the best I can deduce?--------Lots of rear ends out there are C clip axle retained--------others, like fords are not---spool equipped rears cannot be, and some have an upgraded axle package installed with a mod called "C clip eliminators" which is a fabricated part that bolts (or welded) to the end of the axle tube to make it similar to the ford where the axle is held in with a retainer plate around the bearing. At this point , it seems to me, the wording in the kit discription "C Clip " axles really meant that the calipers wouldn't work with a C clip eliminator mod and was therefore for "C clip axles" This of course did lead me on to finally find some speced out as not for C Clip axels------------
Oh well, I use full floaters anyway---------
sorry for the dashes Roger
Damn-I spent all this time typing this and it posted in the wrong thread---time for bed
Jerry, can I be expected to emulate your behavior when I'm your age next year?
.
I don't know Richard-I'll still (hopefully) be older than you next year-----
Okay, I need to ask as I am interested now, what is a large air intake at the underneath on the fuselage midway down the plane, does it have a radiator hidden back there ? Sounded bloody awesome too.
Great looking and sounding plane. I would have thought the Chevy V8 would be a bit heavy for that use.
Sad to see that it has been wrecked in a crash.
Promotes awareness of the Stewart S51., Stewart 51 Partner LLC November News and Events
Very, very cool!Quote:
Originally Posted by techinspector1
Very, very sad....Quote:
Originally Posted by RestoRod
Cool plane.
When I was growing up, the guy on the corner was building a mini mustang in his basement.
I wonder if he ever finished it.
Ya just can't trust them tater fields............
Quote:
Originally Posted by Whiplash23T
Yes Whip-------The P 51 was an watercooled inline engine-much more aero than the large aircooled radials
I see where it's an 8.5:1, 500 hp 502 big block. Didn't find anything about an aluminum block, but aluminum heads would be standard I'm sure. The low SCR allows operation on 100LL fuel (100 octane, low lead) which should be available at most any airport. Crank to prop reduction 2.13:1. The entire aircraft weighs only 3000 lbs, ready to fly.Quote:
Originally Posted by RestoRod
.
A few years ago-Joe Schubeck(Lakewood) developed a package using 426 hemi to power the old stearman crop dusters instead of the radials------don't know exactly details of results-----but driving the prop at the reduced rpm was an issue of it
A bit of propeller trivia. Working on Navy radials I was intrigued with the engine internals, especially the master rod setup but also the reduction gearing. One of the classes had told me that the tip speed on the prop was kept below Mach1. Later I learned that if the tip speed goes supersonic the shock wave splits the air from the prop surface, destroying efficiency - kind of like the part that's supersonic becomes ineffective. The thing is, the prop speed is actually the Helical Tip Speed, made up of the rotating speed plus the forward component of the aircraft speed. That means the faster the design air speed, the slower the prop has to be, but the bite can be increased to use the engine power. I saw an example where a guy was flying a high performance prop plane cross country and was running behind schedule. He decided to push his engine speed to make up time, going from 2400rpm optimum cruise to 2700rpm WOT and was surprised to see his air speed drop by 15 knots! He backed out to 2400, and regained his air speed. The magic number is 0.85 Mach1 speed for the Helical Tip Speed. Any faster efficiency falls off.
It would be interesting to see how the 80% Mustang accomplishes their 2.13 to one reduction, and also if they had to accommodate two plugs per cylinder which is a standard aviation engine feature.
The WW1 planes I build top out at about 1800 - 2000 rpm no reduction.
Whats not to love about P-51's. Thanks for that post Techinspector1.
That was a sweet plane! That's a real bad deal about it being wrecked, but at least the pilot was ok and lives to build another.
Mr.Spears, your last post triggered a memory from a long time ago, in basically the same setting but "Tip Speed" was the topic for of all things... a lawn mower!
And for basically the same reasons there is a peak speed for the pitch / angle etc.. and the govenor setting includes the load at an average speed, so when you try to pull a few extra revs and speed up the process - you may actually defeat the intention.
who knew? :HMMM: :LOL:
Lawn mowers were actually pretty critacal as they made them larger---before they went to double/triple blades