Re: [Flightgear-devel] Helicopter S-51 Dragonfly
Hi Gérard, gerard robin schrieb am 11.10.2007 03:51: > Hello, Maik > > thanks for your offer . > > I will look for data (if i have) in my documentation. > > However, here is a good manual, (mainly for maintenance actions :) ) > http://newsite.ipmssa.za.org/content/view/254/28/ > > page 3 and 4 you will find some information about rotors. > > It is the Sikorsky not the Westland which was a little different (engine > power, and may be the shape of the main rotor, i must check it) > > But these data could be used for the FDM. > > > Cheers > The manual contains some very important information. I will try my very best. The missing numbers I will guess. Do you have information about the exact gear ratio from main to tail rotor? Best regards, Maik - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Helicopter S-51 Dragonfly
On mer 10 octobre 2007, Maik Justus wrote: > Hi Gérard, > > very nice work. I will do what I can to assist you with the FDM. I found > information about the airfoils, but not much more. If you have any > information about the rotor (geometry, weight, rpm, cyclic and > collective incidence, c.g. of the blades, what ever ...) and the > fuselage (position of the c.g., inertia tensor): please let me know. > > Best regards, > Maik > Hello, Maik thanks for your offer . I will look for data (if i have) in my documentation. However, here is a good manual, (mainly for maintenance actions :) ) http://newsite.ipmssa.za.org/content/view/254/28/ page 3 and 4 you will find some information about rotors. It is the Sikorsky not the Westland which was a little different (engine power, and may be the shape of the main rotor, i must check it) But these data could be used for the FDM. Cheers -- Gérard http://perso.orange.fr/GRTux/ - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Helicopter S-51 Dragonfly
Maik Justus schrieb: > Hi Gérard, > > very nice work. I will do what I can to assist you with the FDM. I found > information about the airfoils, but not much more. If you have any > information about the rotor (geometry, weight, rpm, cyclic and > collective incidence, c.g. of the blades, what ever ...) and the > fuselage (position of the c.g., inertia tensor): please let me know. > > Best regards, > Maik > > Hello Maik, first I want to excuse for misspelling your name in my last post - 02:39 am! Then I want to thank you in advance for helping Gérard - I think this ancestor of modern helos is a very nice contribution to our FlightGear helicopter hangar! Regards Georg - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Helicopter S-51 Dragonfly
Hi Gérard, very nice work. I will do what I can to assist you with the FDM. I found information about the airfoils, but not much more. If you have any information about the rotor (geometry, weight, rpm, cyclic and collective incidence, c.g. of the blades, what ever ...) and the fuselage (position of the c.g., inertia tensor): please let me know. Best regards, Maik g.robin schrieb am 10.10.2007 14:35: > On mer 10 octobre 2007, AJ MacLeod wrote: > >> And very nice it is, too... looking forward to seeing it with some >> instruments ;-) >> >> Cheers, >> >> AJ >> > > On mer 10 octobre 2007, Georg Vollnhals wrote: > >> Hi Gérard, >> >> > SNIP > >> what is >> more important is the "tuning" of the flightmodel. It is just an idea, >> but at these days the rotor was fully articulated and the rotorblades >> had a big mass. So the reaction to control-inputs should be a little >> delayed and somehow more "damped". >> Might be Mike Justus could help you a little with this special part? I >> hope so, this helicopter deserves it. >> >> Anyhow, it is a big fun to have this helo available :-) >> >> Regards >> Georg EDDW >> >> > > Thanks, AJ and Georg. > > Georg you are right, > The main rotor was 14.63 meter diameter and tail rotor 2.50 with both a > big > mass and probably an airfoil with low performances. > Referring to the French version (was built under US license by Westland) : > the helo empty weight was 1994 kg and maximum take off 2675 kg > the engine power was only 520 ch. > the maximum speed was 82 knt (153 km/h) > Blades big mass + underpowered + weight => gave reactions delayed and > difficult to fly when the conditions where bad. > > In order to use it, > i first started from the bo105 FDM (every rotor spec and size are coming from > it), > i gave the s-51 engine power the s-51 helo weight/mass , contact points > and > mass positions. > Everything must be done about the rotor . > > Sure Maik would be the best expert :) > > Cheers > - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Helicopter S-51 Dragonfly
On mer 10 octobre 2007, AJ MacLeod wrote: > And very nice it is, too... looking forward to seeing it with some > instruments ;-) > > Cheers, > > AJ On mer 10 octobre 2007, Georg Vollnhals wrote: > Hi Gérard, > SNIP > what is > more important is the "tuning" of the flightmodel. It is just an idea, > but at these days the rotor was fully articulated and the rotorblades > had a big mass. So the reaction to control-inputs should be a little > delayed and somehow more "damped". > Might be Mike Justus could help you a little with this special part? I > hope so, this helicopter deserves it. > > Anyhow, it is a big fun to have this helo available :-) > > Regards > Georg EDDW > Thanks, AJ and Georg. Georg you are right, The main rotor was 14.63 meter diameter and tail rotor 2.50 with both a big mass and probably an airfoil with low performances. Referring to the French version (was built under US license by Westland) : the helo empty weight was 1994 kg and maximum take off 2675 kg the engine power was only 520 ch. the maximum speed was 82 knt (153 km/h) Blades big mass + underpowered + weight => gave reactions delayed and difficult to fly when the conditions where bad. In order to use it, i first started from the bo105 FDM (every rotor spec and size are coming from it), i gave the s-51 engine power the s-51 helo weight/mass , contact points and mass positions. Everything must be done about the rotor . Sure Maik would be the best expert :) Cheers -- Gérard http://perso.orange.fr/GRTux/ - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Helicopter S-51 Dragonfly
g.robin schrieb: > Hello, > > If you are interested on it: > I have added to my hangar, the helicopter naval rescue S-51 Dragonfly. which > suit to the French carrier Arromanches. > > > ... > Today the model is missing a lot of details, the panel with instruments, and > the right FDM. > > Hi Gérard, first thank you very much for this very beautifully historical helicopter model. And for the really interesting links to get more informed about the original helicopter and all the stories about. Although you write "is missing a lot of details" the outside model is already very nice to look at. Of course, instruments are now missing at this stage of development but - please forgive me these words, you already mentioned that it is still missing the right FDM - what is more important is the "tuning" of the flightmodel. It is just an idea, but at these days the rotor was fully articulated and the rotorblades had a big mass. So the reaction to control-inputs should be a little delayed and somehow more "damped". Might be Mike Justus could help you a little with this special part? I hope so, this helicopter deserves it. Anyhow, it is a big fun to have this helo available :-) Regards Georg EDDW - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Helicopter S-51 Dragonfly
On Tuesday 09 October 2007 23:16:09 g.robin wrote: > If you are interested on it: > I have added to my hangar, the helicopter naval rescue S-51 Dragonfly. > which suit to the French carrier Arromanches. And very nice it is, too... looking forward to seeing it with some instruments ;-) Cheers, AJ - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] Helicopter S-51 Dragonfly
Hello, If you are interested on it: I have added to my hangar, the helicopter naval rescue S-51 Dragonfly. which suit to the French carrier Arromanches. http://perso.orange.fr/GRTux/S-51-img2.jpg It was the FIRST HELICOPTER NAVAL RESCUE http://www.sikorskyarchives.com/fhr.html AND remember the movie “Bridges at Toko-Ri” (an old great movie) You may find here 3 pictures from that movie. http://www.fiddlersgreen.net/AC/aircraft/Sikorsky-S51/S-51.php (later on, i will give it the US livery and the pilot with his green hat) Today the model is missing a lot of details, the panel with instruments, and the right FDM. the model can be found there, http://perso.orange.fr/GRTux/tux/index-en.html -- Gérard http://perso.orange.fr/GRTux/ - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
