On the Workbench
Here are the latest photos of the (many) half-finished models in the Stuart workshop. At least when they are in the uncovered state,
you can see some of the construction methods more clearly than
when they are finished. I tend to have several planes on the go
at any one time, which prevents boredom setting in, but does mean
they tend to take a long time to finish!
This is the Golden Age kit, which I can highly recommend, in the process of conversion to
CO2 power. The motor is a Gasparin GM 120, and I am hoping to hide the filler nozzle
inside a removable pilot. You can see the tank between the motor and nozzle. I have built in a lower access
hatch under the motor so I can get
at the mounting bolts, and will have a removable nose block behind the propellor. Scale is close to 1/16th. As usual,
I could not resist putting in a couple of extra fuselage stringers. This should
not be a problem, as I will have no weight of rubber in the rear fuselage to worry about.
Dornier Do 335
Not much to say about this one - it is the West Wings kit, started in a fit of enthusiasm when it first came out, and sitting around in this
state for a couple of years. I am planning to power it with two rubber motors, one driving
each propeller. The kit is very well designed, but there is plenty of scope for weight reduction.
This was not a model I had planned into my schedule – it’s all Greg West’s fault. He sent me a pdf of the plan, which is a pre-war Comet
design, and I knew I just had to build it. The wingspan is 34 inches, and the structure is incredibly light. It is amazing just how little
wood some US designers were putting in their models compared to the bricks turned out by some UK companies. I think this has the potential
to be a real floater for outdoor flying when the weather is calm. There is more structure in some peanut scale models than this, but what there
is in this design looks to be in the right place. The Warren girder struts will help to keep the wings rigidly aligned, and the main challenge
would seem to be the undercarriage, and how to make it more crash resistant. Greg has built one and successfully flown it -
you will find a video of it in action in the 2010 FAC Nats report. It looks so good in the air that this is definitely one I need to finish.
I dug the bones for this one out of the cupboard when I got back from the 2014 FAC Nats, and by
the time October had arrived, some significant progress had been made. You may spot that I decided to add
an additional turbulating 1/16" square wing spar between the main spar and the leading edge. Incidentally, the kit design has a single
3/32 x 3/16" main spar shown on the bottom, which I converted to two 3/32" square spars, one on the top and one on the bottom.
I also re-cut the joins where the outer panels join the centre section and put in a touch more dihedral before replacing all the gussets.
The cowl is wrapped with soft 1/16" sheet rather than notepaper, to make it more robust. Also I have put in a fuselage-mounted wire
landing gear to run inside the front undercarriage struts, but not attached to them, in the hope it will deflect backwards in the event of a heavy landing.
Fast forward to October 2016 and the model is now covered with white Esaki tissue and ready for painting. The wire undercarriage legs
have been sheathed in balsa, and the rear legs, which are
attached rigidly to the balsa fairings next to the wheels, are free to slide into slots in the fuselage as the undercarriage deflects backwards. By a lucky
coincidence of geometry, there is practically no rotation of the rear leg at the wheel fairing end as it slides back into its slot.
Adding the many details shown on the plan has been rather satisfying, including the torpedo and its hangers. The torpedo is basically a
rolled 1/32" balsa tube with hollow soft block sections front and rear. The rear block was shaped, then cut in half and hollowed out with a
rotary tool, getting the walls as thin as I dared before gluing the halves back together. The completed item came out at just 3 grams.
I won the this old West Wings kit in a raffle (it has the original peel-off paper patterns on the parts sheets) and for no obvious reason
took it away on one of our trips up north to cut some bits out. Before I knew what had happened, I got to this stage.
You might notice in the photo that as the design does not feature side keels for the fuselage, I have attempted to keep everything straight when
adding the stringers by temporarily gluing scraps of balsa sheet between each former on both sides. These will come out anytime soon.
I plan to finish the model as an Audax in desert colours, just to be different.
My old Comet Stearman 76 dimer had flown pretty well at Geneseo in 2012, despite it not being the lightest of models, and much repaired. I fancied building a new one
using some of Alan Cohen's excellent strip wood, hoping that by doing this plus the inclusion of a forward motor peg (just behind the rear cockpit) I could knock a couple of grams off the weight of the previous one.
As I'm sure I've mentioned before somewhere, there is a lot of satisfaction to be had building a simple model like this as carefully as you can. It will be interesting to compare the performance
of this model versus the Ripon. The little balsa tags on the tailplane and fin are for mounting the rigging wires shown on the plan - FAC rules dictate that all rigging and
details drawn on the plan have to be present on the model.
This is a peanut scale plan by Paul Boyanowski which I decided to build to take out to Geneseo in 2016 - the design is light, and it should fly well. It
won't have the level of detail I might put in a BMFA peanut, and it certainly doesn't have scale rib spacing, but for this model, duration is he main
criterion. The rudder and elevators are hinged - a feature not on the original plan, but useful for trimming.
Some more progress visible in October 2016 - the bones are now covered in Esaki tissue, ready for painting.
My chosen scheme is an aircraft operated by the SOHIO
Oil Company, which has white fuselage and red wings and elevators, so the components have been covered in the appropriate
colored tissue to suit the final airbrushed colour. You can also see the removable nose plug including the engine cylinders modelled in relief.
Peanut scale Blackburn Ripon
Here we go again with another attempt at a lightweight peanut for BMFA competition. It's based on the (accurate) outlines of my Dime Scale
Ripon, but the fuselage sections have been improved using extra stringers, and the flying surfaces have scale structure. To get a scale rib spacing at
minimum weight, about two thirds of the ribs are indicated only by sliced upper ribs – only the remaining third have top and
bottom strips. All four ailerons will be hinged (half a scale point per separate control surface surface is the reason for this!) Only one wing panel has
been completely finished and the aileron hinged so far and this weighs 0.44 grams. The fuselage weighs 2.1 gram including undercarriage wire.