Egilman

At the start of WWII this aircraft was the equal of the Me109, not quite as good as the A6M2 Zero... The RAF pilots were the first to use it in combat and began to experience it's tendency to go into control lock in a high speed dive... The AVG in China flying it against the Zero figured out the tactics that needed to be used to make it a winner.... But also reported it's tendency to control lock.... In the US this was being investigated by all the aircraft manufacturers as the problem appeared with the P-38 and the P-51 as well... (eventually appearing in the F4U Corsair as well) It's was the beginnings of recognizing the main problem of high speed flight, compressibility..... The aircraft is going so fast that the air at the leading edges of the control surfaces would "Pile" up causing a pressure wave to travel along the surface until it reached the rudder or elevator locking them in the straight position.... The only resolution at the time was to slow down the aircraft till the pressure buildup against the surfaces abated... A partial solution was to move the pivot point of one of the control surfaces away from the other... On the P-40 this was the Rudder, they moved it behind the elevators, On the P-51 they extended the vertical stabilizer and rudder behind the elevator, on the P-38 they used another device, counterweights to forward load the elevator giving it greater mass... (a very weak solution, the high speed dive issue was never fully resolved in the P-38) And the F4U corsair was resolved by moving the elevator back behind the rudder... These were the best they could do when they really didn't understand the problem and what was causing it.... The Germans encountered it with the jet aircraft they were designing and resolved that swept leading edges were the solution... (yes, for sub 600kt aircraft) Today these physical flight problems have been overcome, and understanding the engineering history is one of the fun parts of modeling these aircraft, (besides the unit and action histories) I'm in brother, The P-40 represents the first American designed and built fighter aircraft to see significant combat service in WWII... And started us on the path to where we are today....

Why thanks Vad.... Yep strong.. that's the Marmon way.... the post was heavy cause it held the bracket which held the spur gear up for the ring gear mounted to the wheel to engage, on the other side it held the end of the speedometer cable.... Here is an image of it from the Marmon advertising manuals of the day.... When originally designed, built and raced, (the1909-10 season) it had a speedo... When they brought it out of retirement for the first 500, (it's only race in 1911) it was left off....

Thanks Ken and welcome to the thread, I try to keep it interesting.... Engineering, it's as simple and complicated as one could want... It's why I enjoy it so much... {chuckle}

Well another short update.... Front Axle.... Been adding the spindles carriers... Left side... Right side As you can see I've started adding the details, the Grease Cups and the nuts for the steering knuckles which on the right side has the Cap Nut with the post for the Speedometer gear... (not present on race day) Rear side... Here you can see the round bosses for the steering knuckles which were identical left to right... Once those are designed I will then have to add a very special part, the steering arm... On the first front Axle, I designed what would be on the standard Marmon Speedster, I had no other reference... But in reality, it was a part unique to the Marmon Wasp..... For Example.... Front, low and away and the back side.... it is bolted to the Speedometer cap nut on the front, (which locks it in place) loops around the spindle carrier the over the steering knuckle back near the steering cross link... And it's one part... Time to experiment.... May take a while.... But I'm still making progress.... The ubiquitous overall view... Onwards....

Excellent Job! Well done.... I see a lot of aircraft engineering in this one, especially things that haven't changed yet from when originally engineered... An unskinned aircraft is a compendium of the history of aircraft engineering.... (as long as you know what your looking at) Very nice....

Short update... Front Axle... (not complete just a progress update) And an overall shot.... Working out the spindle pivot tubes now.... Onwards...

Oh, she's named "brenda" although those letters don't make it easy to read....

Nice photos of an M-60A1....

Uh, Pilot, Co-pilot and Bombardier are clearly in box cover pic..... I'm in for this one as well..

That is one beautiful camo job brother... Very effective.... Excellent photographing job as well....

Derrick Cope used to run at Spanaway and Evergreen till he graduated to the big time.... Cope Bros Machine is where I would get my heads shaved & blocks bored....

I did, most of what I stated was tongue in cheek.... My apologies if I offended... Nascar and USAC are two completely different sanctioning bodies... Everyone knows that... Spanaway Speedway where I ran sportsman cars for a few years in the late 80's used to be a 1/4 mile USAC dirt track, then became a 1/2 mile dirt track, then back to a 1/4 mile but paved, until they sold out to a housing developer.... Kinda familiar with the history brother...

What Exactly is this? It's what they do with all the worn out parts when they rebuild a grand national stock car is what that is.... {chuckle} It's a throwback to the old days of USAC Modified dirt track class... A lot was lost when USAC essentially folded, All the Sportsman classes were hit the hardest.... This is Nascar's attempt to keep the bare bones of backyard homegrown sportsman racing alive.... I'm in....

https://www.ebay.com/itm/374822136270?chn=ps&mkevt=1&mkcid=28&srsltid=AfmBOorf3xqekXjD5_B7RKXN_RqiNC9KbTgbxv-Dtfu4BWM2oibY1p4M4oU Best price available I can find.... The big dollars are aimed at the 1/16th scale version... You can still get the 1/24th scale at semi reasonable prices....

{Chuckle} Except for the color... (they were OD green in government service) Although I will say they looked a lot prettier in Chevy Orange... or even black....