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Oct 2007 Primed with two
Flights under belt. |
Feb 2008 |
Written & Built
by Stuart.
This pictorial review is a personal one for your entertainment and general
information it is not the opinion of any other party regarding this product.
Comments and any reference techniques made are of my personal findings
pertaining to this original kit. I hope it may of some use to those of you wishing to build this
type of model
etc. should you have any comments feel free to contact me through the
contact us page. I will add
to this page as and when each stage is approached along with pictures.
The time taken
to build this model bears no reflection on the kit in any way, just my lack
of time running business!
This is an original DB kit
supplied with foam wings and typical balsa construction.
The wings are
supplied in three parts with the centre section being fully sheeted and
outer wings sheeted on the bottom only with 3/16 balsa, the tops to be completed and profiled by builder.
There's a lot
of work to be done with the wings just think yourself lucky the new kits are only available
with a built up wing from DB Sport and Scale - website
www.dbsportandscale.com
The planned specifications
are wingspan 81", weight 18-20lb, Engine: 20-40cc 2st. or 30-60cc 4st. Scale
is approx.1/5.
It is worth pointing out
that this kit and the new kits come with an original sloping sided canopy.
Essential Item - Good mask, as there's a lot of sanding to be done.
This
is a good 'builders' kit, the good design and step by step assembly make for
a straight forward build. With the trickiest part of the build being the
fuselage lamination to maintaining symmetry, yet with a good building board
this will be no problem. The foam wings are something else but as mentioned
discontinued so if your fairly new to building or want to give a larger
build a go you won't go far wrong with the DB Spitfire, and there's always a
helpful voice at the other end of the
DB
Kits telephone!
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The Build:
Fuselage
Tail Section
Wings
Final
stages:
Given
the size of the model I thought it best to cover in glass & epoxy to make it
ding proof, so glad I did as I've banged of the walls a few times! I wont
discuss glassing its well documented in previous model magazines.
However I didn't give the model a second epoxy coat so as to keep weight
down, used putty paint instead sanding in between coats. This method worked
really well and primed the model to boot.
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Two
flights in yellow Primer! |
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Opposite the model
is ready for a test flight in primer yellow, with retracts and split flaps.
The box said weight 20lb and 30cc engine 2c. Mine came out at 25lb so
fitted a Zenoah 38cc.
As a rule of thumb
to fly you need 25% of the weight in static thrust i.e.. 25% of 25lb =
6.25lb of static thrust required. With static checks made the Zenoah
with a 20 x 8 (Classic Prop) give me 11.lb at 7K RPM - 20 x 6 (Wood) 15
lb. static thrust at 7K RPM.
So without
further ado my first test flight attempted with the 20x8 and playing
safe I dropped about 30% flap. Full throttle - knees knocking the model
took of perfectly. Only small trimming required. I was surprised how
stable and responsive - too responsive for my liking, though in fairness
flying on full control movements! |
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The power from the
Zenoah was perfect, I guess a Zenoah 45cc would make it ballistic. I had only put a 16oz tank in the front
(so playing very safe) after 12
minutes should attempt some dummy landings with flaps engaged.
Unfortunately when I hit the smallest flap setting she nosed dived. I
hadn't set enough up elevator in the mix, this meant a faster landing on
the rough grass -ok.
For the second
flight I set the spectrum up for dual rate switches to operate Expo on Ail. &
Elev. (32%) and flew with 'adjust mode' on flap/elev. mix. Thus making it
easy to switch flap
in & out - adjusting elevator accordingly. Such that my second flight went
perfectly with a full flap landing - smooth. At last I can now paint.
I hope you like
the paint scheme, opted for desert colours (hence yellow matt primer-
keep weight down) Panel lines stencilled in and sealed with a
light dusting of polyurethane satin. |


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