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Land / Re: Canadian Leopard C2 MEXAS
« Last post by Old Wombat on Today at 10:30:47 AM »Working tanks - Good! 
... where imagination trumps reality
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Swords to Plowshares GB Now Open!! |
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New Model Kit News/Reviews / Re: MiniArt Plastic Model Kits
« Last post by Old Wombat on Today at 10:17:08 AM »It looks like the poor waiter has been working at the same cafe since the 1940s...
So, just paint his hair very light grey or white!
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New Model Kit News/Reviews / Re: Hobby Boss
« Last post by Old Wombat on Today at 10:14:48 AM »1/35 IDF Eitan Wheeled APC coming:
Oh, bugger!
Again!
Ditto !!! You're in good company Wombat. I now have 9 resin kits that have been recently released in plastic.
I'm fine on the resin front, it's just another kit I'm going to have to find a hiding place in the Wombat Stash for.
SWMBO must never find out!
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Swords to Plowshares GB / Re: BTR Arctic Explorer
« Last post by Frank3k on Today at 09:16:31 AM »Designed them up using a Tractor Tyre base and adding the rest, happy to send you the STL if you want.
Yes please!
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Engineering Dept. / Re: Airframe Scaling
« Last post by apophenia on Today at 08:54:48 AM »For your cruise missile, consider the engine in the JSSAM-ER, which I am given to uderstand is the same as was fitted to the AGM-137A/BGM-137B. That should give you a suitable and proven engine.
Thanks Evan. I had considered the Teledyne J402-CA-400 which seemed to be a perfect size match.
That said, two elements make the J402 series less than ideal. The first is having a much higher sfc than (the admittedly bulkier) modern turbofans. The second is a turbojet's give-away screech at low altitude. (Mind you, the latter issue doesn't seem to stop the Storm Shadows from getting through.)
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Other / Re: Just some cool photos...nothing more, nothing less...
« Last post by apophenia on Today at 08:45:37 AM »Top Aces @topaces
Exciting news! Our TA-4J Skyhawk landed safely in #Canada this week, accompanied on its journey from #Germany by our trusty Learjet.
A lovely build ... although there is a bit of 'silvering' on that '499' nose decal
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Land / Re: 1/72 "Tank, Infantry, Mark 1, A11, 'Matilda' "
« Last post by apophenia on Today at 08:42:24 AM »... 3D printing has come a long way.
Must've done! That looks amazing, Robin! And in 'Braille scale' too
Lovely work
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Swords to Plowshares GB / Re: Spitfire Cloudbuster
« Last post by apophenia on Today at 08:39:16 AM »Glad you liked it 'Mog.
When I saw your CO₂ tank canisters, I immediately thought of those WW2 Spits with beer barrels under their wings and slipper tanks mounted
When I saw your CO₂ tank canisters, I immediately thought of those WW2 Spits with beer barrels under their wings and slipper tanks mounted
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Swords to Plowshares GB / Re: Still a Warrior of Sorts
« Last post by apophenia on Today at 08:36:27 AM »Thanks folks!
'Mog: The rainbow stripes in the paint scheme I pinched from the RW N423RS. But I found the rest of '423's scheme uninspiring ... so I reached back to the Amchitka protest days. This was a big deal, at the time, here in southwestern BC.
Journalists started predicting tsunamis which would wash us all away. Those us in our teens translated those dire warnings into an urging for direct action: Stock up on 'recreational aids' and prophylactics immediately. We were prepared!
Jeff: I've no doubt that the Basler's PT6A-67R turboprops would do the job. At 1,280 shp each (2,560 shp total), they've got a bit more oomph than the original Twin Wasps. Alas, in my arbritrary mid-1970s timeframe, no 'large' PT6A was available (the first PT6A-67 didn't fly until 1984).
If we assume that the Steward-Davis Super Catalina package's Wright R-2600s were ideal for a water bomber conversion, then we would need around 3,400 hp total power. The readily-available Dart fits in there nicely and would be reasonably affordable on the 'gently used' market. The issue, as you say, is its unwieldy length (which Avalon Aviation got around by partly underslinging their engines).
So, if we want around 3,400 hp total power c.1975, I'm thinking that we have two options:
- 1: Appall Greg and nail 4 x 850 shp PT6A-41s onto the Canso centre section; or
- 2: Appall everyone and re-engine with 2 x 1,505 shp PT6T-3 TwinPacs driving single
For option 1, total output is the ideal 3,400 shp with little or no increase in frontal area (PT6 cowlings being so small compared to the radials).
For option 2, total output theoretically could be 3,600 shp but, more realistically, would be derated to 3,010 shp. And that power would be generated closer to the original thrust lines. TwinPac cowlings would be much bulkier than the individual PT6s, but no more so that the original R-1830s.
To my mind, option 1 is the superior option. AFAIK, the TwinPac has never been considered as turboprop. Based on Soloy's Dual Pac, I'm guessing it would've worked ... but 'guess' and 'successful STC application' don't often work well together
'Mog: The rainbow stripes in the paint scheme I pinched from the RW N423RS. But I found the rest of '423's scheme uninspiring ... so I reached back to the Amchitka protest days. This was a big deal, at the time, here in southwestern BC.
Journalists started predicting tsunamis which would wash us all away. Those us in our teens translated those dire warnings into an urging for direct action: Stock up on 'recreational aids' and prophylactics immediately. We were prepared!
I have to wonder if the Basler turbo-conversion for the DC-3/Dakota/C-47 might work as well on the Catalina/CANSO? A more compact design that would possible help with center of gravity issues created with the R/R Dart package sticking out so far forward of the wing.
Jeff: I've no doubt that the Basler's PT6A-67R turboprops would do the job. At 1,280 shp each (2,560 shp total), they've got a bit more oomph than the original Twin Wasps. Alas, in my arbritrary mid-1970s timeframe, no 'large' PT6A was available (the first PT6A-67 didn't fly until 1984).
If we assume that the Steward-Davis Super Catalina package's Wright R-2600s were ideal for a water bomber conversion, then we would need around 3,400 hp total power. The readily-available Dart fits in there nicely and would be reasonably affordable on the 'gently used' market. The issue, as you say, is its unwieldy length (which Avalon Aviation got around by partly underslinging their engines).
So, if we want around 3,400 hp total power c.1975, I'm thinking that we have two options:
- 1: Appall Greg and nail 4 x 850 shp PT6A-41s onto the Canso centre section; or
- 2: Appall everyone and re-engine with 2 x 1,505 shp PT6T-3 TwinPacs driving single
For option 1, total output is the ideal 3,400 shp with little or no increase in frontal area (PT6 cowlings being so small compared to the radials).
For option 2, total output theoretically could be 3,600 shp but, more realistically, would be derated to 3,010 shp. And that power would be generated closer to the original thrust lines. TwinPac cowlings would be much bulkier than the individual PT6s, but no more so that the original R-1830s.
To my mind, option 1 is the superior option. AFAIK, the TwinPac has never been considered as turboprop. Based on Soloy's Dual Pac, I'm guessing it would've worked ... but 'guess' and 'successful STC application' don't often work well together
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New Model Kit News/Reviews / Re: Hobby Boss
« Last post by raafif on Today at 08:18:56 AM »1/35 IDF Eitan Wheeled APC coming:
Oh, bugger!
Again!
Ditto !!! You're in good company Wombat. I now have 9 resin kits that have been recently released in plastic.
