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Author Topic: 60 span 51 size P-51 Mustang .  (Read 27375 times)

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60 span 51 size P-51 Mustang .
« on: June 29, 2016, 06:28:46 AM »
This is based on a tangent to Al Rabes P-51 Articals . Read several times , Digested Anylised and Absorbed !
Later with My MB3 ( Martin Baker )


This Adhered Strictly to Als Formular . Aerodynamically . Fuse was Formers Planked . Came out at 5 ton ,
or about 71 Oz. ( Sopme Clunker wood here & there , no ' special finishing ' brushed on Humbrol Enamel .

Just come up with ' Like being a pasenger in  ( on ) a Speedway Sidecar . Old Analogy was
' Like in a dodge 440 with a stuck throttle in the rain on a skidpan doing a precision driving test '
Great Fun , but hardly relaxing . ( Recreational = geddit )

As his comments were about chopping of his wingtips , we decided to too . Ended Up 50 span , about 20 Oz. Sq. Ft .
Only Change was to sit the pushrod on the inner hole at the elevator . As Expected ( Started with Even Movement )

One wouldve thought this'd all be to much . 65 ft of .018 and a G 51 with a 10 x 6 three blade made it work , though
without the interconnected rudder harsh applicationin the wind in the top of the hourglass or maybe into the clover
could have ' sprinting practise . Immediate . on the agenda for the day . Walking to the field ( warm up ) helpped there .

Tried a 10 x 4 three blade with a 8011 Torp .40 thrown in , to help in the gales . Not the grunt of the 51 , so I grabbed
a G 40 much latter , when one came up . Itching to do another , But Profile . 40 same Dimns , same with ST 40 & 51 ,
or pulled out 20 % ( 60 span ) we cannot decide . The latter would be more practical as a ' big ' comp stunter .

But the attraction of the orriginal was it wouldve blown of Valentino Rossi . No Problem . To Heavy to fly over 5.0 / lap.
usually 4.5 for the wind . Entering Bunts from 45 deg. inverted was a test of faith . But essentially you wondered if it
was flown by computor or if there was a little man inside of it , as ' the bottoms ' were so consistant , considering
the planform , wings and tailplane , were scale .Moments too . shortish nose . carried lead with the Torp. .40 .
This sucker NEVER hit the deck , in 100 odd flights . Id took it back to the wings ) tossed Fuse . Gave them away
wwhen I moved from Wgp . ??? >:(

THEREFORE
We Had MOTIVATION to see the next itteration ? was more butterfly like . wing loadingly .

Thus the P- 51 We Added Span , ( used Scale Planform / outline , iF I recall wright )
Abandoned Full Sheeting of wing , Strived For LIGHTNESS , Tissue Covered and empenage .
simplicity - sheet flaps ( 1/2 Sht .)
Had some good hard 1/4 sht , an offcut , I split end to end , and just got Four Spars , 3/8 tapered to 1/4 , with the grain along them . Nice Firm 1/4 x 1/2 T.E. caps .
Nearly all the rest of the wood IS 4 / 6 Lb , Not My Usual Fare . Normally go for grain and toughness- not soggieness .

ANYWAY , the clipped tips arnt clipped , maybe the Fuse is a bit scrawny , Fins to Tall , I went for a ' H ' ( see the Whittingtons ) will trim of the last bay .
That About Cover it . But I havnt put in a movablew rudder. Dont Like the Extreranal Linkages . Must put it on hinged so I can try it, I suppose . Almost there .

So Its Designed after thoroughly contemplating Al Rabes , but built to a differant concept . More Conventional F2B aerodynamics ( Airfoil ) addap[ed to
the P-51 Airframe .
The Only Real Fancy Trick , is. Ive Dropped the Leading Edge at the Centerline , to get the assymetril / lifting Airfoil through the cenatre bays.
Al's perscription there , approached differantly . My Hurricane it was the T.E. that was dropped . Result is a flatter underside adjacent the fuse , on both .

Emough Drivle for Now.
A Few Pictures of shiney Silver ones , so you can see how the shapes fit together / run into one another . ;D

 A Side Shot , shows the kinky underside in the reworked radiator , I Didnt Use . Small Canopy / Fairing going Half Back . Flatter Top Deck Arond / aft cockpit .



The Nose .

The Wing Tips ( Not Stock P-51 ones here )

They Give You a fair idea of the canopy too , the fairing here DOESNT run all the way back to the fin .
Getting a bit carried away here ( wanna black'n'Gold sea fury ) Miami 73' http://s126.photobucket.com/user/richbonneau/media/Miami%2073/Top-39_edited-1.jpg.html


Same Aeroplane Later , note the Tail Plane is NOT Clipped , another of the reasons we went with this , wont bother to show the Ridiator used at this stage just here .
« Last Edit: June 30, 2016, 01:52:27 AM by Matt Spencer »

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Re: 60 span 51 size P-51 Mustang .
« Reply #1 on: June 29, 2016, 06:31:04 AM »
Someofem'll be a bit repetitive , as Im just whacking the lot on.

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Re: 60 span 51 size P-51 Mustang .
« Reply #2 on: June 29, 2016, 06:34:16 AM »
Used overly light 3 / 32 for the sides , which caused a few bothers .

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Re: 60 span 51 size P-51 Mustang .
« Reply #3 on: June 29, 2016, 06:38:36 AM »
Scale Cross Sections . The Rear Sides crease in after the ply doublers , as the fuse is wider under to house the radiator . Or the Fuse Narrows from the Rad. Housing UP .

This is ' Jennie / Miss Candace . No 69 Unlimited Air Racer . The Top Deck was redone through the Canopy area - so flatter top there than a std. P-51 .
Top Block - 1/4 sheet , ready to go on here .

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Re: 60 span 51 size P-51 Mustang .
« Reply #4 on: June 29, 2016, 06:40:46 AM »
about 41 in long , here . you can see the 36 in sht join , but its a 3/4 in. beveled lap .

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Re: 60 span 51 size P-51 Mustang .
« Reply #5 on: June 29, 2016, 06:43:30 AM »
There its all sanded up , sitting behind a replacement 2 stage merlin spit. replacement fuse . One the tart got . 2 1/2 spinner on the P-51 .

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Re: 60 span 51 size P-51 Mustang .
« Reply #6 on: June 29, 2016, 06:45:47 AM »
Ditto.

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Re: 60 span 51 size P-51 Mustang .
« Reply #7 on: June 29, 2016, 06:48:02 AM »
OH .
you can see the blotting paper wood ( Needs Seasoning a few years , or kiln drying ) causing GRIEF .

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Re: 60 span 51 size P-51 Mustang .
« Reply #8 on: June 29, 2016, 06:50:10 AM »
Aforesaid ' doghouse ' area . The Last Open Bay under is BEHIND the Flap T.E. , where the ' outlet ' will be going .

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Re: 60 span 51 size P-51 Mustang .
« Reply #9 on: June 29, 2016, 06:57:09 AM »
We Wont mention the Tail wheel . Will We .  ^-^

The Diagonal Line @ the Doubler Top Face is where the top tapers in. Basically a box ( square ) where the PLY is .
Can See its ' strip planked ' there . Beveled Edes at the strip joins . Saves whittling a plug , to Mould the Top Deck .

There was a bit of dithering and prevarication there , as to wether it was to be Miss RJ / Roto Finish / Merlin ' Red Baron ';
which'r all the SAME airframe , No 69 , or a 'D' bubbletop . Have them on paper , went fore the lowest frontal area Trip .
Bar Stilletto - But That Wouldnt Really be a ' P-51 ' to most peoples eyes , for F2B at least .,




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Re: 60 span 51 size P-51 Mustang .
« Reply #10 on: June 29, 2016, 06:58:48 AM »
Ply Doublers to helpp spread the load . Thin Ones .

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Re: 60 span 51 size P-51 Mustang .
« Reply #11 on: June 29, 2016, 07:02:57 AM »
Looks Like the WING was already BUILT at this stage . Pre 2008 in fact . took a good deal of brushing the dust & filth of . Aforesaid bimbo trashed a mint Top Wood Fuse built then. Bit of luck it wouldve been in the Nats Here Then .

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Re: 60 span 51 size P-51 Mustang .
« Reply #12 on: June 29, 2016, 07:05:26 AM »
More of the Same . Canopy is still around 1/8 in oversize here . Had the smallest hood  of a P-51  pre skid lid rule - days .

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Re: 60 span 51 size P-51 Mustang .
« Reply #13 on: June 29, 2016, 07:11:25 AM »
Got a bit carried away forcing down the top deck Fwd. there . & with the sanding block . Eventually scarfed is a new 1/4 top front , rather that laminating on multitudinous corrections to the initial excessive flatening .

You Can see the Rad / Dog House Drg. there . I think Cummins put a top hose 'H ' Rad. in , but kept buggered around front / intake panels . The Drg. & one Ive Done are more correctly the Later ' Jeannie ' ,

A side view of the 'H ' top hose fitting type Air Scoop set up . Thetre all a bit individual . But Less DEEP and not the CURVE under per stock P-51 .

« Last Edit: June 30, 2016, 02:07:56 AM by Matt Spencer »

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Re: 60 span 51 size P-51 Mustang .
« Reply #14 on: June 29, 2016, 07:15:08 AM »
Here Goes that little bit . V Light Wood mostly again . Require Brain Engaged & ' cinerella ' fingers . Tecnically it can hit . One P-51 Did , Got a scoop full of earth whilst NO scratches on the prop , on a lkow pass , hump in the sagebrush.

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Re: 60 span 51 size P-51 Mustang .
« Reply #15 on: June 29, 2016, 07:16:49 AM »
We've Decided a COMO 51 Baffled Ringed pdp is going under the hood , in the new fuse .

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Re: 60 span 51 size P-51 Mustang .
« Reply #16 on: June 29, 2016, 07:19:03 AM »
You can see what fits in over the hole under the rear , here & how . Gets about 1/4 trimmed of the top , yet .
« Last Edit: June 29, 2016, 10:12:47 AM by Matt Spencer »

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Re: 60 span 51 size P-51 Mustang .
« Reply #17 on: June 29, 2016, 07:20:37 AM »
3/16 alloy pads under the motor get a bit of hight for tank adjustment . Enough room in the tank bay to feed one of those tooned pipe  guzzlers .  S?P

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Re: 60 span 51 size P-51 Mustang .
« Reply #18 on: June 29, 2016, 07:24:27 AM »
Top View of the Dog House , the ' V ' splitter goes up agaisnt the rear wing underside .

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Re: 60 span 51 size P-51 Mustang .
« Reply #19 on: June 29, 2016, 07:26:21 AM »
Stiffer Q grain under the front there /

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Re: 60 span 51 size P-51 Mustang .
« Reply #20 on: June 29, 2016, 07:30:29 AM »
Can See where the WING T.E. will be , relaxed and went ' artistic ' doing this part . Thought I may as well take my own good time , and have live the high life , seeing it was a FridayEvening . Most of the filth are at the pubs then .

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Re: 60 span 51 size P-51 Mustang .
« Reply #21 on: June 29, 2016, 07:33:41 AM »
One Above you can see how they kept the width for the rad.  Mines a notch narrower , wing fillets will cover that , only rear will maybe match . Later .

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Re: 60 span 51 size P-51 Mustang .
« Reply #22 on: June 29, 2016, 07:48:43 AM »
Indulging in laminating plywood wrapped arond tubes , and suchlike . Couldnt do the Rear untill the Wing is on , as its all got to fair in there correctly .

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Re: 60 span 51 size P-51 Mustang .
« Reply #23 on: June 29, 2016, 07:51:50 AM »
Plethoria of Pictures , The twists & turns of the P-51 nose intake take some emulateing . Another ' play the Artist ' trip . Reading Triumph X75 development stuff . Californians .

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Re: 60 span 51 size P-51 Mustang .
« Reply #24 on: June 29, 2016, 07:55:03 AM »
The Fancy Super Tigre Tounge Muffler ( They look to be Ex. Du Bro Ex. Extn. Stock , so replicable . If youve got three lengths of that , its fairly probable .
The masking tapes there to empisise the Cowl Split line . Tryn for easy access , without having to remove needle or spinner if  you have to whip the engine out .

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Re: 60 span 51 size P-51 Mustang .
« Reply #25 on: June 29, 2016, 07:58:59 AM »
Maintaining something like scale P-51 Panel Split Lines .

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Re: 60 span 51 size P-51 Mustang .
« Reply #26 on: June 29, 2016, 08:01:19 AM »
Dissapointed I cant run the exhaust out the scale outlets , but theres a limit if you want a practical aeroplane .

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Re: 60 span 51 size P-51 Mustang .
« Reply #27 on: June 29, 2016, 08:02:57 AM »
Im Sure Everybody would like to see a Few More shots of THAT . :##

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Re: 60 span 51 size P-51 Mustang .
« Reply #28 on: June 29, 2016, 08:03:50 AM »
oops .o.k. 3/8 in - ft. scale P-51 Plastic Air Race Canopy buck , with the ' 69 ' canopy / fairing on it . Anda Spit where with a R.E. you can duct the Exhaust out the 12 stacks . Or jusat use em to scavenge the Engine Bay .

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Re: 60 span 51 size P-51 Mustang .
« Reply #29 on: June 29, 2016, 08:08:03 AM »
' 69 '

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Re: 60 span 51 size P-51 Mustang .
« Reply #30 on: June 29, 2016, 08:09:30 AM »
On a FLAP or Two. ;)

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Re: 60 span 51 size P-51 Mustang .
« Reply #31 on: June 29, 2016, 08:14:23 AM »
The Control and Udercarrage CHORE seems to be largly dispoed of , at this stage

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Re: 60 span 51 size P-51 Mustang .
« Reply #32 on: June 29, 2016, 08:18:54 AM »
Pushrod needs to be kept in close , as the bellcranks hard against the top spar , mounted on the Ply Joiner with a 5/32 Bolt . Leadouts are horizontal . Out tru the bottom of the inner tip .

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Re: 60 span 51 size P-51 Mustang .
« Reply #33 on: June 29, 2016, 08:21:33 AM »
youll see Ive only used single wire for the leadouts , its not intended as a knockabout everyday hack .

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Re: 60 span 51 size P-51 Mustang .
« Reply #34 on: June 29, 2016, 08:23:32 AM »
oh. oh . can see im getting concerned about nose heavieness by now .

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Re: 60 span 51 size P-51 Mustang .
« Reply #35 on: June 29, 2016, 08:24:53 AM »
Wing Sheeted now .

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Re: 60 span 51 size P-51 Mustang .
« Reply #36 on: June 29, 2016, 08:28:11 AM »
NEVER reuse a NUT , as on the final tightening when finished , IT'll wipe the smirk of your faCE . n1 Largly as Id accidently used a metric bolt in a 4-400 T nut . Grit the Teeth and CHOP IT OUT . >:( >:( >:( >:(

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Re: 60 span 51 size P-51 Mustang .
« Reply #37 on: June 29, 2016, 08:29:58 AM »
THAT looks like a REALLY FLASH Bolt there . DOESNT IT . ! :-X

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Re: 60 span 51 size P-51 Mustang .
« Reply #38 on: June 29, 2016, 08:32:22 AM »
Weve Decided artists are Drongos , and we'll show THEM how to do it . at this stage . Fancy Tips on the Full Span Wing .

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Re: 60 span 51 size P-51 Mustang .
« Reply #39 on: June 29, 2016, 08:34:56 AM »
The 9th wonder of the world fits in above / on the red marked centerline / pins , there . except its upside down , if youre a bit slow today .

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Re: 60 span 51 size P-51 Mustang .
« Reply #40 on: June 29, 2016, 08:37:52 AM »
Thus . Those bits are Ply Wood . Both Surfaces of the joins have recieved a Pre Coating of PVA , to ensure theres No Dry Spots in the connection . So its Fully Connected . Thus STRONGER .

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Re: 60 span 51 size P-51 Mustang .
« Reply #41 on: June 29, 2016, 08:40:51 AM »
Score Lines in the 1 / 32 ply are to control the curve , in the finished face , outside . Theyre In . Obviously. You Cant Glue it to AIR . S?P

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Re: 60 span 51 size P-51 Mustang .
« Reply #42 on: June 29, 2016, 08:44:02 AM »
Smoother outer face than Id Expexted , no carving through the laminations neccesary with smooth conture . Proceed determinedly but surely , and definately unhurridly . Step by Step By Step . A lot of STEPS in theose Tips .

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Re: 60 span 51 size P-51 Mustang .
« Reply #43 on: June 29, 2016, 08:45:51 AM »
Have to find another BEE for the BONNET now .  :D

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Re: 60 span 51 size P-51 Mustang .
« Reply #44 on: June 29, 2016, 08:49:55 AM »
YOURE NOT BRING THAT INTO MY HOUSE . Borer . Firm but Reasonable . Definately Not Negotiable . Sensable to do em horizontally some time previously . Cant be ;) :## Spotted Then .

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Re: 60 span 51 size P-51 Mustang .
« Reply #45 on: June 29, 2016, 08:56:03 AM »
Test Fit . 1/8 dia. flap horns , split. double bushed . C/F pushrod .

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Re: 60 span 51 size P-51 Mustang .
« Reply #46 on: June 29, 2016, 08:58:45 AM »
Ditto.

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Re: 60 span 51 size P-51 Mustang .
« Reply #47 on: June 29, 2016, 09:00:39 AM »
Rebates / Clearance . in the mainplane T.E. for flap actuate clarance / salignment .

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Re: 60 span 51 size P-51 Mustang .
« Reply #48 on: June 29, 2016, 09:07:44 AM »
Prep , 3/32 piano wire pushrod end , for C/Fibre Pushrod .

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Re: 60 span 51 size P-51 Mustang .
« Reply #49 on: June 29, 2016, 09:10:19 AM »
Friday Evening , Last . Snowing Outside .
« Last Edit: June 29, 2016, 10:03:29 AM by Matt Spencer »


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