Martin piston-engined bombers and concepts

[jcf]

As it sez. 

The Model 177 to start.

[apophenia]

Oh, that is lovely! Maybe a bit 'Hunnish' but certainly attractive. At any rate, much more balanced looking than the Model 177A - the pilot might even sneak a view out to the sides

Some of the Model 177 features look very Maryland-esque - the wing planform and retractable turret, especially. (By chance, is the wingspan readable in your original?)

The tailwheel u/c was a surprise (after the 177A) but those "unknown' powerplants are very intriguing. Does anyone know when Pratt's R-4360 was first conceived?

Cheers for that Jon 

[jcf]

Wingspan is 61'4" per the text image attached to the post.

According to Graham White's R-4360 Pratt & Whitney's Major Miracle, serious
design began November 11, 1940 with the first proof-of-concept engine running
on April 28, 1941. It was built using 28 R-2800 "B" series front cylinders.

The Maryland features are no coincidence, a number of Martin proposals from
the period clearly used the Model 167 as a starting point.

[apophenia]

Excellent. Thanks Jon!

Span is identical to the Model 167. So, the Model 177 was some sort of Über-Maryland on steroids! Nice 

[jcf]

Wait till you see the Model 174. 
Think stretched Maryland with swept leading edge gull-wings. 

[GTX_Admin]

I must admit that I have always found the Martin 167 (Martin Maryland) design an attractive one:



Would look good with a torpedo underslung I believe.

It would be interesting to see some 167s in the schemes of those worn by operators of the competing Douglas  DB-7/A-20 Havoc family such as Australia, Brazil, The Netherlands, USSR, USA...

[apophenia]

Wait till you see the Model 174. 
Think stretched Maryland with swept leading edge gull-wings. 

   Can't wait 

[jcf]

Model 176, another 167-ish fuselage. Possibly X engines.

[jcf]

Mostly XA-22 stuff here, a couple Baltimore as well:
https://www.nationalmuseum.af.mil/Upcoming/Photos/igtag/Attack/?igsearch=martin%20xa-22

The USAF Museum site used to have these great research pages, unfortunately
they improved the site and the research stuff went away, and you're stuck
with a craptastic photo search which forces download rather than being able
to link.
 

[jcf]

Maryland forward section being crated and prepped for shipment to the UK.
In case you were wondering how tight it was. 

[finsrin]

176-C has cool front profile. 

Also looks a little Russian DNA snuck in.

[The Big Gimper]

How long did it take to reassemble an A-20 or similar A/C to first flight?

[Kelmola]

The front profile of the 176 reminds McDonnell XP-67 a bit because of the blended wing. Is that "6-19-40" the date of photographing the plans or the date of producing them? If the former, would have been interesting if Martin had proposed this to the USAAF instead of 179 which became the Marauder. OK, Marauder had twice the range and double the bomb load than Maryland/Baltimore, but the extra space in those THICC wing roots and reduced drag could have made 176 competitive range-wise and Marauder was often flown at less than full bomb load to extend the range.

[GTX_Admin]

Its interesting how one's tastes work.  I like the Martin Maryland's look but don't like the Baltimore.

[Old Wombat]

Its interesting how one's tastes work.  I like the Martin Maryland's look but don't like the Baltimore.

Yep, 'coz I have the opposite aesthetic view.

[apophenia]

I'd love to hear the rationale behind the Model 176-C! Compared with the 167, the wings are slightly lower. I wonder if the blended wing was to provide more space for ordnance in the wing roots (perhaps freeing up the fuselage for a crew direct-communications tunnel?).

Model 176, another 167-ish fuselage. Possibly X engines.

Or maybe Continental I-1430 'Hyper' engines?

Its interesting how one's tastes work.  I like the Martin Maryland's look but don't like the Baltimore.

Svelte or Rubenesque? 

[GTX_Admin]

Its interesting how one's tastes work.  I like the Martin Maryland's look but don't like the Baltimore.

Yep, 'coz I have the opposite aesthetic view.

Well, you're obviously wrong...

[jcf]

The front profile of the 176 reminds McDonnell XP-67 a bit because of the blended wing. Is that "6-19-40" the date of photographing the plans or the date of producing them? If the former, would have been interesting if Martin had proposed this to the USAAF instead of 179 which became the Marauder. OK, Marauder had twice the range and double the bomb load than Maryland/Baltimore, but the extra space in those THICC wing roots and reduced drag could have made 176 competitive range-wise and Marauder was often flown at less than full bomb load to extend the range.

The blending, and laminar aerofoil profiles of nacelles/fuselage, on the XP-67 turned out to not
give the hoped for results. In the case of the Model 167proposal it probably would have had
greater drag, both profile and parasite, than the Maryland.

It was an interesting notion, but the blending really didn't make sense on the piston-engined,
prop-driven aircraft of the period.