Seafire MK47 von Yves Fernandez


I see web site Agentignen ; the Seafire MK47 fabioulous modèle from Hernan Martinez ( designer motorcycle).
The original wing construction is on tubing carbon dia 26 ; RC longeron system. I thing this is heavy
And not rationnal .I use my construction, 3X10 pine wood reduce and end 3X6 ;I BEAM construction.
I beam is light,speed realisation and perfect géométrical.
The problème with semi scale model is the weight ; big nose ,big modèle.
The détachable wing mécanismous + 60 Grs ( 2oz) + 10 grs Rudder +10grs Stabilo.
The landing gear complète with weel ; two pieces 100 grs ( 4 oz)
I use for glued the cyanolacrylate very fluid ZAP"CA (red bottle) ; with this glue i bringt half time for
Built one model. For the planqing i use white glue or Pattex yellow ; mouth and inserts Araldite. For the Carman
Araldite + satured with Micro baloons . The glue in gel ; no good.
Fuselage
Sand papier 240 and 400 For the good géometrie use grade 180 OR 240.For the finish grade 400 to 500
2 Coats dope nitro cellulosique
Glass fiber 25 grs (1 oz / m2)+ Epoxy. This is no more heavy and japan paper 20 grs+ 5/6 Coats dope.
This finish is better and more resistant in the years.
The wing and Stabizer
Sand paper 240 400
2 coats dope
Covering with Polyspan médium 20 GRS/M2 (3/4 OZ) + 12 or 20 grs Japan paper
5/6 Coats dope nitro cellulosique

Technique liste

  • Wing span 1600 - 63 inches

  • Lengts 1240 - 48 ,8 ins

  • Wings Aera 46 dm2 71,3 SQ/IN

  • Stabilo Aera 10 dm2 15,5 SQ/IN

  • Noze length 270 1O,6 ins

  • Lever Arm 485 19,09 ins

  • Breitness wing 270 + 80 Flaps 10,6 +3 1/8

  • Weigth scare/dm2 43 grs

  • Wegth modele 1980 grs

  • C G 80 mm from BA 3 1/8 INS

  • WING +FLAPS only wood 320 GRS with covering, no color 480 grs

  • Stabilizer 60 grs 90 grs

COLORS

Aftgrund ligth only fuselage ,little parts and critical zone.
Spies HECKER 2 componants laque automobiles.
No idéal for Syntétique Oil ; No problème with Castor Oil.
Color gray metal complète the model. Dépose the small scotch 1/16 Decor the transparent blue of the metal (give à luminated blue) (20% THINED)
+ Little decors Total 100grs

ENGINES POSSIBILITY

  • The Saito 72 / 82 tank 100 cc 4 oz and ZINGER prop 14 X 5 Mod -10 grs 30grs is nécessary because the inertie of the return for the start fuel 10% Nitro T

  • he famous PA 75 2 ports with Pipe # 8 And 13 X 3,75 3b from Brian Heather the tank 220cc is nécessary for this engine fuel with 10% Nitro

  • Home made engine the Amazon 84 ( 27 dia x24) Magnésium cranckase. The seme montage

Special Mouths magnesium /dural home made for the tree engines ( 30 grs ).
The former N 2 for the engines fixation is composite : 1 ply 1/16 + 8 x 1/16 Balsa (in creutz) + 1/16 Ply total 5/8 ins 16 mm tickness.


Yves Fernandez, Juli 2010

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