> >It takes much higher actuator forces if the vanes are hinged at the > >top. For supersonic flows, the centre of pressure is in the middle of >> the plate. > >
> Still, by pivoting it only slightly above the centre of pressure you can > arrange for the actuator forces to be reasonable, whilst allowing > neutralisation if the power fails. The A4 / V2's vanes, which look to be carbon, appeared to hinge slightly BELOW centre - but they had an extension further into the exhaust at the bottom end and this would presumably have had an overall bottomwards bias. Fascinating to see that they were driven by sprockets and chains. FWIW I have about 14 colour close ups (many OK, none as crisp as I would have liked*) of the vanes in a V2 plus drive/system, nozzle. injectors etc. Average file size is about 600 kB (5 MPixel JPEG images). I can send them to anyone interested. If interested in vanes alone there is one closeup (with my hand for sizing) and one general shot which shows all 4 vanes and nozzle, injectors and vane pivot system). I'd recommend the whole 14 for enthusiasts. I also have photos of V1, Wasserfall, Me163 and much more - but if you want all those I recommend you visit the Deutsches Museum in Munich yourself. (Or I could send you a CD by arrangement ...) http://www.deutsches-museum.de/ Russell McMahon * I was almost running from exhibit to exhibit as the utter vastness and excellence of the museum utterly outstripped the available time. Alas, photo quality deferred to quantity and variety in some cases. The V2 insides confuses both flash and focussing to some extent and I didn't have time to get them really right. While many of the photos are OK by many people's standards they are all somewhat lacking technically. _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
