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Post by airtime on Sept 5, 2009 19:49:22 GMT 10
Howdy all, Just purchased my first 3m ship, The Furio. Got it off Mike from the thermal comp. I was thinking of high starting it with a Bungee I've got it's 100ft long. The wall is 2mm thick and the diameter is 11mm. will it be strong enough to launch the ship it's about 2.2kg. And how would I set it up and attach it. Any Ideas
Cheers Astan
Maindened it today Fly's beautifully. Lands on a dime
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Post by thevon on Sept 5, 2009 20:19:27 GMT 10
Astan, it sounds like that's the same hi-start rubber that Mikey100 got from Sailplane.aus www.rc-sailplane.com.au/accessory_detail.php?accID=31And we've been using it extensively as discussed later in this thread: windsock.proboards.com/index.cgi?board=chat&action=display&thread=1266Yes, it definitely should launch the Furio. (Wow, I'm jealous ... that's one heckuva special plane). We've been launching both light (2.0kg) 3m thermallers and I've successfully launched my 2.5kg Fazo, even with 1/3 ballast, no problems. It works best with a slight headwind. Use a strong ring and a small parachute. The main thing is to have 4 or 5 times as much line as rubber. Your rubber is 30m long so you need to have 120 - 150m of line. We use pink builder's stringline - very strong and easy to see in the grass. Make sure you stake it very strongly. Lay it all out and you can stretch it at least 3x the length of the rubber, ie you can stretch it out 90m. It works really well. |
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Post by nige on Sept 5, 2009 20:36:03 GMT 10
I think you need to test it tomorrow young Astan!
Nigel
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Post by skyboyken on Sept 5, 2009 20:38:36 GMT 10
One thing to think about Astan, BTW congrats on the plane!!! Your new Furio is set up for aggressive winch launches and flying. By this I mean the CG will be well aft and the hook will be well behind that. That's no problem if you duplicate Mike's launch settings and you use a powerful winch to launch the plane, because you saw how great they launch at the comp. It can be a BIG problem if you try to use those settings on a bungee! Without knowing what setup info you have it's difficult to know exact settings, so my suggestion would be to fly the plane off a slope (with a nice landing area) first and get a feel for the CG and general control setup, and move the CG forward if necessary. Then put the hook so its rear face is about 2-3mm in front of the CG. If you then use the recommended launch camber setting with neutral elevator (i.e. cruise trim) you should get a safe launch on a bungee or any winch. Do mark the current hook position though if you do this  . These planes launch insanely well with the hook behind the CG and a fair bit of down trim to prevent pop-offs. Only on a good winch though. Furios are fabulous! I'm sure you'll love yours Astan!! Go Great! Ken. |
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Post by airtime on Sept 7, 2009 5:24:32 GMT 10
Thanks fella's that should help a lot. A bit worried about buggeeing this thing yet might practice with some foamies first.
Astan
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Post by thevon on Sept 7, 2009 8:26:29 GMT 10
Astan, the only thing is that bungeeing foamies is a completely different thing to Hi-starting big thermal planes. Fast small planes and foamies are launched as a "catapult" on a short powerful line, and they fire directly at the stake very fast then pull up when the line gets slack. Histarting is totally different- they go up like a kite. Like winching, but on a histart setup it's more gentle. My tip is you won't learn anything from catapult launching that will help you with the Furio.
I reckon the best thing would be to ask Ezza if he could give you a hand with the first time!
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Post by airtime on Sept 7, 2009 21:23:46 GMT 10
Thanks Andrew, I'm a bit worried about bungeing cause I had a bad experience with the bungee and my brand new fling. first launch it hit the deck. Full right turn. Nosed in and snapped the fuse at the rear.
That's why I'm a bit weary, but I'm keen to get to a flat Field and catch some thermals.
Mikes been a real help, gave me all his setup details. So it's all setup for the winch . The bungee will need less camber than the winch on the start off.
Done a few landings at Eric's Sunday. So much more stable than the Erwin in lite wind that is. Looks slower until it gets close. Landings are getting better.
Got the v-tail and the ballast today in the mail from mike all in a box.
Thanks Mike
Thanks for the help everyone lookin forward to joining you all in the next comp. Astan
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Post by bundyglida on Sept 7, 2009 21:31:07 GMT 10
I personally wouldn't launch a furio on a bungee. The furio likes to move, and faster type moulded gliders can easily be stalled on a bungee. With the typical height gained before this may happen, it may not be enough to recover from or get off the line. Bungee launching is ok for the more F3J orientated models such as pikes, explorers etc. as they have much lower stall speeds, but a furio will tend to flick (tip stall) if you slow it down to much. If you really want to do it, move the tow hook forward , set the aircrafts CG to the 'manufacturers' specs, use a little less flap then you would on a winch, and be ready to nose it over to keep the speed going. My best advise would be to get to know the plane on a winch first, and once you feel comfortable, then play with the bungee. These are just my opinions, but I have seen this situation before and it isn't always pretty, and at the moment that furio is  Dale |
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Post by airtime on Sept 8, 2009 4:05:25 GMT 10
Hey Dale, Thanks for the advise. I think I'll do that. I'de like to keep this one in 1 piece.
Astan
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Post by mrbonk on Sept 8, 2009 8:25:56 GMT 10
Thanks for the help everyone lookin forward to joining you all in the next comp. Astan That would be here in Bundy this weekend, so you'd better pull finger out and get it sorted pronto ;D |
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. These planes launch insanely well with the hook behind the CG and a fair bit of down trim to prevent pop-offs. Only on a good winch though.