The MK2 Shackleton MR2 project. :)

Well as the Balsa Shackleton went wrong and i always wanted a shack.
I have decided to start again from scratch.
With my newly learned CAD skills i will be drawing up some plans for a Depron version.
I am not fitting contra rotating motors as i just cannot afford them, so single props will be the order of the day.

So stand by for a long slow drawn out designing session for a new mr2 Shackleton.

Rough draft.

ooooh!!

How big Tony? Very interested in this one.

Tony
Interesting!
I appreciate the need for single props but it might look better if just the front prop was retained with the rear 'spinner' built into the the cowling.

I am sure there would still be plenty of room to fit the motor.
Just a thought.

Dummy props in the feathered position look just awful - vis: KK Gannet:

www.outerzone.co.uk/plan_details.asp?ID=1362

However, I do like Q's idea of a spinner shaped cowling, or you could even consider an extended spinner.....

well as i have been sat on me arse ma in law sitting nearly all day, i did some more rough CAD until the lap top battery went flat.






these are just rough sketches taken from the three view.
i will be tidying them up and drawing up some more accurate drawings that i will be working from.



bit like this, showing the former positions.

Looking good Tony....isn't CAD a wonderful invention!

whilst chatting to Andy this afternoon i been CADing some more.




cores drawn up and former positions marked.

Tony,

Very pleased to see some movement on this in a different direction for sure, and to maybe help that along the way, contra rotating props are a lot easier than we though using only one motor, 2 large bevel gears, and 2 small bevel gears to provide the reverse coupling, or even 2 of the old Meccano type gears that had a 90 degree turn at the outer edge, with ordinary pinions as the reversers.

Don't have the CAD program here at this stage to mock something up, suffice to say that it's going to be very easy to do with very basic tools, and a few bits of Aluminium angle. A small lathe would make some of it simpler, but even that complication could be avoided without too much trouble. A possible source of gears would be the differential as used on some of the racing cars that are readily available, and the casing could also provide some of the support structure.

I suspect this thread is going to be watched with more than passing interest! Thinking of CAD, which program are you using? Could be useful going forward, when it comes to printing full size plans for construction, as there's a large plotter here than can print 42" one dimension, and a lot further in the other dimension, so well able for something like a full size wing layout plan if needed.

i use Total cad 2d/3d only costs £7.99 from maplins.

Andy started a thread on how to use it some where.

Well it will take a while to get the plans all drawn up.
going for 11th scale now, so thats nearly 11ft wingspan.
should be nice and light being made out of depron.

Little bit more CAD done this evening.
no rush on this one, not starting till the end of the year.

With ref to gears. I bought a pack of mixed gears of all shapes and sizes from Bang Good .There are aCOUPLE OF DIFFERENT BAGS ( oops sorry about caps lock ) The mix I got was great ,Spirals ( worm ), skewed, turned edge, Large gears with a small concentric one round the spindle hole Very small ones you can hardly see that they are gears Some long ones in relation to diameter. and not forgetting bevelled Nothing much you couldn't do with them. I think some on line shops carry them too and. HK carry a few and have a link to Motionco who make or supply great looking gears. I know we don;t really go for looks in gearing BUT ,,,,,,,,,,,,

nose ready for cutting i think.
then it can be redesigned as it is build and all the faults show up.

printed it off today and spent a few hours gluing and cutting 20 sheets of a4 paper together.



lets hope it all stays stuck together in storage for the next few months.