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Old May 31, 2005, 09:31 PM
corrupted - 17x18 or more
eye_rc_soar's Avatar
College Park, Maryland, United States
Joined Nov 2003
506 Posts
F5B-7, I tried it and like it, why aren't there more flyers?

I did a fair amount of F5B practice flying this holiday weekend, and surprising to me was that I enjoyed and flew my 7-cell Avionik more than any of my other planes. This is probably tempered by the fact that I was flying alone by myself and not having to try and better a fellow competitor. But non-the-less, the 7-cell won out over my Avionik B1L, and my F5F. Both the B1L and F plane were using new matched GP3700 packs and acknowledged to be some of the fasted planes at the recent VA F5B contest, while my 7-cell Avionik (powered by a Plettenberg 220/15/A1 P6 7:1 with a 16x17 slim) was using a year old 7 cell pack of GP3300ís. The 7-cell battery was so bad that if it was not hot off the battery charger, the Hacker 125 esc would not start the motor.

Sure the other planes were faster and could easily fly more legs, but the 7-cell was just more relaxing and truly enjoyable to fly. The 7-cell was also more instructive in teaching proper climb, course entry, and proper leg flying. When you did something wrong, the plane let you know immediately by slowing down. There was no large inertial mass to keep the plane moving through a badly executed turn, or turn exit, if the plane was not continually pointed down hill. It was amazing at the difference in speed in legs 3 and 4 when you did things right. It was immediate feedback and very instructive. You did not have to guess what was wrong, it showed you immediately. It was a thrill to have the plane still whistling loudly upon entry to the climb after 4 legs. It was truly fun chasing the 30 leg goal I had set.

Iím just disappointed at the lack of other F5B-7 flyers. I will admit that the cost between a 7-cell and a 10-cell plane is almost negligible, and we seem to have a large number of F5F flyers here on the East Coast of the US, but very few have tried 7-cell flying. They are missing something. I discovered it this weekend, and am now really excited about Steve Neuís report on the new Neu 1506/1D/6.7 and the successful use of the CC Phoenix 125 for 7-cell flying.

Hopefully more people will try 7-cell F5B and get turned on to it. Besides who wants to try and pack around a 2+ meter F5F wing, when a 7-cell wing is only 1.5 m span and fits easily into any car. (Even I, who has a 1-ton pickup truck, complains about hauling around a 2+ meter span wing.) Open class will always be there, but why F5F when there is 7-cell?

Everyone likes pictures, so here is the 7-cell next to the F and B1L.

don
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Old May 31, 2005, 09:36 PM
Permaculture de NEW Technology
Rondog's Avatar
Southern Socialist Republic of Commiefornia
Joined Dec 2002
1,256 Posts
Maybe you're ahead of the game and we're all just catching up?

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Old May 31, 2005, 09:40 PM
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down_shift's Avatar
United States, VA, Leesburg
Joined Feb 2003
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LOL. If "7-cell Avionik" was replaced with "Flash 60E", your theory holds true, but for 66% less $$.
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Old May 31, 2005, 09:46 PM
RIP Ric
Andy W's Avatar
Marietta, GA
Joined Jun 1999
43,312 Posts
A: "mo power!"


In all seriousness, if a local F5B series started up, 7 cells would be a way to make it 'affordable' to most.
..a
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Old May 31, 2005, 09:55 PM
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United States, VA, Leesburg
Joined Feb 2003
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Quote:
Originally Posted by Andy W
A: "mo power!"


In all seriousness, if a local F5B series started up, 7 cells would be a way to make it 'affordable' to most.
..a
The second you mention "avionik", "neu", or "ESC w/a current rating north of 125", affordable goes out the door.

Nearly any ~ $300 1.5M moldie with a low budget 10-cell 65 amp setup is good for over 26 legs and on the heals of 7-cell 125 amp planes costing 2x more.
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Old May 31, 2005, 10:15 PM
tic
thunderscreech
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New Cumberland, PA. US
Joined Dec 2000
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Personally, I enjoy 10 cells in F5B airframe.. while not "legal" it's not as expensive either and still plenty fast!
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Old May 31, 2005, 10:42 PM
I like cheese...
Whizwaz's Avatar
Bloomington, IN
Joined Sep 2001
846 Posts
I had my little 7-cell Vanessa at the last meet, and no one noticed. Wrong motor (10-cell hacker B40-5L), wrong propeller, and still squeaked out a 26 lap run.
I have to agree totally with Don in all aspects. These planes will show you exactly when you are not flying them correctly. I think it takes more skill to get these around the course without killing airspeed.
Now, I hate to tell you "I told you so", but...
I am really thinking of ditching the F5F plane and focusing totally on 7-cell. -- John
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Old May 31, 2005, 11:02 PM
BANNED!!!
soholingo's Avatar
Laurel, MD
Joined May 2001
12,688 Posts
I noticed John. Bottom line 10 cells are convient and more cells seem to be more better. But in actual practice, 7 cells give you the similar feelings when flying, except there is more confidence in flying the 7 cell plane.

I have a 7 cell setup and plan on keeping or improving it. Don when you move up to Neu 7 cell, put me in front of the line for your pletti setup..

Jay
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Old Jun 01, 2005, 12:04 AM
tic
thunderscreech
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New Cumberland, PA. US
Joined Dec 2000
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I think you seven cell guys should "man up" and fly 10 cells
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Old Jun 01, 2005, 01:40 AM
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WimH's Avatar
Belgium, Flemish Region, Oosterzele
Joined Dec 2001
5,484 Posts
Quote:
Originally Posted by tic
I think you seven cell guys should "man up" and fly 10 cells
I could not agree more, but then they should also move up to an F5F legal airframe in my very biased opinion (?). I flew 7 cell and 10 cell in last weeks contest. It was rather windy, and it was much more relaxing to fly the bigger 10 cell model. Not to mention the fact I can see it better and don't have to come out of a thermal about a minute or so after I found one ( I chose an "extra-large" airframe (Calif) over a super-thin (Ariane V-10) one for this reason (poor vision) as well when choosing my latest second hand model...)


Now that Wolf does more or less as many laps as "normal" pilots with more cells and smaller planes, maybe why should reflect a bit as to why the bigger planes seem to perform better than they should, and start thinking about a "unified" F5B category as well as Lipo's....
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Old Jun 01, 2005, 04:58 AM
sloping addict
Protocooler's Avatar
France
Joined Feb 2003
1,536 Posts
IMHI Lipo would be a bad move in competition because as you would push them as hard as you can, even best power density cells available will be killed very fast and instead of killing $100 ish GP pack you will kill $500+ packs (as much as can fit in the airframe!).
Who really thinks doing only a few flights with a $500+ pack is a way forward, even if indeed you can get same watts at less weight as a NiMh pack ? Lipo Packs, however good, will swell under competition abuse: nobody will be competitive unless they push packs beyond their ratings.

And you'll be lucky if they just swell, as they could also they catch fire in the plane under the abuse...
No, I don't think the rule change can/will happen. The only possible way I see would be to force motor time to be about 3 minutes, to make sure no one will push cells much beyond 20C.
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Old Jun 01, 2005, 05:48 AM
tic
thunderscreech
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New Cumberland, PA. US
Joined Dec 2000
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IF lipos become legal for F5B.. Soholingo will be the first to use them. All others will have to follow and follow they will, the aiframe with smoke pouring out of it augering into the ground.
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Old Jun 01, 2005, 09:35 AM
UN Earth peoples true enemy
treehog's Avatar
Euroland
Joined Jan 2004
1,801 Posts
smoke trails in the sky

Would the lipo inducced smoke trails help to show the turns and how to do it better

Ralf
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Old Jun 01, 2005, 09:37 AM
Permaculture de NEW Technology
Rondog's Avatar
Southern Socialist Republic of Commiefornia
Joined Dec 2002
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Roflmao!!!!!!!!!!
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Old Jun 01, 2005, 10:24 AM
tic
thunderscreech
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New Cumberland, PA. US
Joined Dec 2000
10,936 Posts
Actually a BEC induced fire produces a thicker, richer smoke which would be more useful in tracking the plane.
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