Agreed it’s a DFW C V – minus Benz Bz IV engine.
One of the types that I keep looking at for a RC model – because it hasn’t been done to death!

Robin

Or Firefox with Adblock+ does the same job.

We are in a battle though and some internet sites rely on advertisers to pay for their sites so are starting to pester me to add their site to my white list.

If they but knew it I get so annoyed by people who waste my time with advertisements that those who get through to me are likely to get onto my black list of firms I would not buy from if they were the last on Earth they would know how counter-productive their policy really is.
Unfortunately there seems to be no opt-out clause on those grounds so (for their own good) I am continuing to block their ads until such time as they bar me from their site (should I live so long!).

My first advice is therefore to change your browser to one that values your privacy by offering an advert blocker.

I too would like to have a look at those old photos.
I well remember Victors on approach low overhead the St.Albans southern bypass.

HP111, you may have known my uncle, Fred Hobbs, who worked in the woodwork shop on the wind tunnel models for the Victor. I remember him telling me how each section had to be carefully weighted.
He must have been a good carpenter – built himself a violin after his retirement.

Robin

[ATTACH=CONFIG]245602[/ATTACH]When I visited last weekend the Snipe was minus engine CADman.

If anyone has a real need to know where the remains of Dennis Copping are may I suggest that there is one ‘unscientific’ method of finding anything you need to. That method is dowsing, which does not rely on logic – indeed the application of what we think we ‘know’ to the process almost guarantees its’ failure. It requires a cleared mind, simple trust and an instrument (rods, twig, pendulum) that can give simple answers to simple questions. I can explain so far as I understand it how to work the system, but lacking the need to know I would not volunteer to do it because my experience tells me that in all probability I would find myself on a ‘wild goose chase’. However when I have had a need to know something it can often be startlingly accurate.

I apologise to any scoffer who is offended that I mention something so lacking in scientific approval, but for the ‘right’ person I assure you it can work.

Always a delight to see ‘EDU – and of course that she is getting much more airtime in new hands.
The Dragonfly is arguably one of the most attractive of the DeHavilland aircraft (although others, like the Albatross, can give it a run for its money) and I modelled this aircraft a few years ago – so it’s especially nice to see the article and photos.

Robin

I don’t think that climb rate or even efficiency were the prime reasons for using contra-rotating props. I believe it was as attempt to absorb the increasing power of aero engines in the light of the dangerous swing on take-off experienced by pilots of the Hawker Typhoon for example.

Any propeller has a side area that produces a helical airflow which affects the effective angle of attack of the wing on either side of the engine and also has an effect of the rest of the airframe and stabilisers in the propwash. (Fins were frequently offset as one attempt to cope with this)

The extra propeller was the way decided on to eliminate (so far as practically possible) the increasing problem without increasing the diameter of the propeller, but the arrangement introduced more weight so in the same airframe as a single propeller power train that would have decreased the ceiling.

There are means designers can use to negate problems of course but these are just a few thoughts.
Gannet, Wyvern, Shackleton and the Russian ‘Bear’ come readily to mind as using the technology, mostly in the turboprop era.

Robin