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Old Jun 25, 2010, 12:54 AM
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Jurgen Heilig's Avatar
53859 Niederkassel, Germany
Joined Sep 2000
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Quote:
Originally Posted by Infante View Post
only got the info of the wattmeter:
1098W
72Amps
16,50v
I can tel you that it flyes very fast an also light setup.
is faster than the funjet ultra with the multiplex propulsion kit.
Well, considering you run 1100W rather than 700W (recommended FJ ULTRA setup) you should be faster, otherwise 400W waisted in heat losses would melt your model.

The question is: How efficient is your setup compared to the recommended setup? Do you have noticeably better performance, or is there only a marginal difference and the added power is just mostly waisted in heat losses in battery, ESC and motor?

Jürgen
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Old Jun 25, 2010, 07:08 AM
Where did Steve go ?
Alexandra
Joined Jul 2007
3,312 Posts
Like anything you want to make go faster its a law of ever diminishing returns. IE it takes more and more input to get smaller and smaller increments of improvement. See drag racing, F1, WRC and funjets...

Quote:
Originally Posted by Jurgen Heilig View Post
Well, considering you run 1100W rather than 700W (recommended FJ ULTRA setup) you should be faster, otherwise 400W waisted in heat losses would melt your model.

The question is: How efficient is your setup compared to the recommended setup? Do you have noticeably better performance, or is there only a marginal difference and the added power is just mostly waisted in heat losses in battery, ESC and motor?

Jürgen
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Old Jun 25, 2010, 02:32 PM
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Portugal, Lisboa, Sintra
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Quote:
Originally Posted by Jurgen Heilig View Post
Well, considering you run 1100W rather than 700W (recommended FJ ULTRA setup) you should be faster, otherwise 400W waisted in heat losses would melt your model.

The question is: How efficient is your setup compared to the recommended setup? Do you have noticeably better performance, or is there only a marginal difference and the added power is just mostly waisted in heat losses in battery, ESC and motor?

Jürgen
i can tell you that mysetup copared with the multiplex, is faster and consumes less amps. we made the experience with the watmeter and the multiplex setup only with 3s the reading was 75amps and 703Watts with the same prop.My reading was 950w and 64 amps with 3s.
Wen i fly with a friend, is very easy to notice the diference of speed in full trothle passes with the same batterys.
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Old Jun 25, 2010, 03:36 PM
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53859 Niederkassel, Germany
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Quote:
Originally Posted by Infante View Post
...
My reading was 950w and 64 amps with 3s.
...
In order to achieve 950W with just 64A requires a voltage of 14.844V under load. That's impossible with a 3s Lipo.

Jürgen
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Old Jun 27, 2010, 11:23 AM
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I think he meant a 4s Lipo!!!!!!!
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Old Jun 27, 2010, 12:47 PM
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Quote:
Originally Posted by codys View Post
I think he meant a 4s Lipo!!!!!!!
With 4s he claimed 1100W, so something's a miss here.

Jürgen
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Old Jun 28, 2010, 01:43 PM
rcflyer
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How much faster can this actually go compared to the last?
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Old Jun 28, 2010, 03:54 PM
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Greece
Joined Jun 2007
139 Posts
Hello guys

5cell setup is by far the best setup i have ever had on a funjet. I had the opinion that this plane must be as leightweight as possible but i reconsidered. . Not good video quality but you can see for yourshelf .

1100 grams, 80amps max. Heatsink on battery and motor. 210 km/h

FanJet & petranf.avi (2 min 55 sec)
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Old Jun 29, 2010, 05:26 PM
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My FJ ULTRA plus drive set has arrived

Here are some pictures of the ESC and the Hitec High-Speed outrunner:
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Old Jul 01, 2010, 09:08 AM
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Foam part weights ...

Center part/ fuselage 149.6g
Turtle deck 15.7g
Canopy 26.7g
Wing panels (L/R) 47.4g / 45.0g
Vertical fins (L/R) 8.8g / 9.3g

That's 302.5g total.

Jürgen
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Old Jul 08, 2010, 03:12 PM
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Quote:
Originally Posted by Jurgen Heilig View Post
...
Vertical fins (L/R) 8.8g / 9.3g
...
Sanded and painted (Honda Pewter Grey metallic):

9.4g / 9.9g - i.e. 0.6g added to each vertical fin.

Jürgen
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Old Jul 08, 2010, 04:30 PM
Fast? I got something 4 ya!
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United States, WI, Oak Creek
Joined Oct 2007
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Quote:
Originally Posted by Jurgen Heilig View Post
Sanded and painted (Honda Pewter Grey metallic):

9.4g / 9.9g - i.e. 0.6g added to each vertical fin.

Jürgen
Nice Jurgen, that color will go well. Can't wait to see the finished product!

casey
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Old Jul 09, 2010, 04:32 PM
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More pictures ...

Well, it is really hot over here, so i am taking it slow.

Carbon fibre spar sanded and glued into the center fuselage with Slo-Zap. Outer wing panels glued onto the fuse and spar using Slow-Zap. To improve torque transfer from wing to spar I used two lines of Beli-Zell on both sides of the spar (I used white one for better visibilty ).

Jürgen
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Last edited by Jurgen Heilig; Sep 01, 2010 at 01:18 AM. Reason: "to" changed to "two"
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Old Jul 10, 2010, 01:12 AM
Fast? I got something 4 ya!
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WOW Jurgen looks to me like it will be stiff and rigid as hell. Love the silver look. Looks like a NASA prototype gone mach 15. Beautiful!! Yeah good call on the sanding of the spar, and the epoxy glue or whatever u used. I cannot stress to people that when your going top SPEEDS, reinforcement is really important. Thats why in a dive people wonder if there servos are failing or if the wing is just really flexing making you think one is failing. Nice job as always Jurgen!

casey
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Old Jul 10, 2010, 01:34 AM
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Beli-Zell is not epoxy, but PU-glue. Epoxy should not be used on Elapor.

Jürgen
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