peterj Posted November 19, 2008 Share Posted November 19, 2008 According to the manual the max speed is 350 km/h at S/L How come you get an IAS MAX warning at 300 km/h and damage occurs 10-20 km/h above that? Link to comment Share on other sites More sharing options...
r-unit Posted November 19, 2008 Share Posted November 19, 2008 It depends, yes you will get warning of over-speed, but are you over-tourquing the rotor at the same time? I got it to 340km ish in dive, with overspeed warning but not over-tourquing... so no damage occured. :) Link to comment Share on other sites More sharing options...
Namenlos Ein Posted November 19, 2008 Share Posted November 19, 2008 Take a look at this: http://forums.eagle.ru/showpost.php?p=545617&postcount=1 412 km/h! Link to comment Share on other sites More sharing options...
V1Rotate Posted November 19, 2008 Share Posted November 19, 2008 yes but did he survive the pull up? i7 930@ 3.8GHz, Corsair H50-1, Asus P6X58D-E, 6gb Patriot Ram, ATI 5850 1 Gb, Antec 300, F3 1GB HDD, Corsair 24" Dell 2408WFP. Saitek X52 Pro+Rudder, TrackIR4 Link to comment Share on other sites More sharing options...
ED Team Yo-Yo Posted November 19, 2008 ED Team Share Posted November 19, 2008 Yes, he did. By the way, he mentioned that rotor rpm value is 82% at low blades pitch but the engine runs at TO power. Pull up must be as gentle as you can. No turbulence of course. Significant turbulence puts restrictions for some maneuvers. Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles. Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me Link to comment Share on other sites More sharing options...
peterj Posted November 19, 2008 Author Share Posted November 19, 2008 Yeah that was the problem. I see that if you avoid to over speed the engines by lowering the collective accordingly the aircraft wont break at higher speeds. Link to comment Share on other sites More sharing options...
ED Team Yo-Yo Posted November 19, 2008 ED Team Share Posted November 19, 2008 Yeah that was the problem. I see that if you avoid to over speed the engines by lowering the collective accordingly the aircraft wont break at higher speeds. I can guess that the statement must be inversed: if you avoid to under speed the rotor it wont break. The higher is rotor rpm the lower is flapping, that's the point. Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles. Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me Link to comment Share on other sites More sharing options...
peterj Posted November 19, 2008 Author Share Posted November 19, 2008 OK, so the engine rpm limit is hit because it's trying to maintain rotor rpm? And a lower rotor rpm means there's a greater force on the rotor blades (in this case) and eventually they'll break? Link to comment Share on other sites More sharing options...
ED Team Yo-Yo Posted November 19, 2008 ED Team Share Posted November 19, 2008 1. Yes. 2. No. As you can see the blades travels up and down during one rotor revolution. It permits to avoid rotating moment due to the different velocities of advancing and retreating blades. This movement provides necessary blade AoA difference to compensate it. It is FLAPPING. As the speed increases the flapping increases too. The centripetal force lowers flapping so if your rpm decreases and the flapping becomes higher you will get blades intersection. Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles. Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me Link to comment Share on other sites More sharing options...
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