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Author Topic: E-36 Pulsar  (Read 2117 times)
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hastf1b
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Winding my Tilka during the german chamionship `87



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« Reply #25 on: October 26, 2017, 06:33:37 AM »

Looks like David and Goliath.  Smiley 

Very good result.

Heinz
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Re: E-36 Pulsar
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OZPAF
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« Reply #26 on: October 26, 2017, 06:07:31 PM »

Hmm- he had you on span and area Urs - but it looked like fun anyway.

John
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« Reply #27 on: October 27, 2017, 06:45:04 AM »

Urs

I remember it well, with Alessandro appearing in the last picture!! Did any Brits go this year as Gavin said he might attend ?

Peter
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USch
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« Reply #28 on: October 27, 2017, 09:58:06 AM »

No Brit's around this year, Peter, only a good number of French guys with F1B, Coup's and F1S.

Yesterday a shock wave hit me  Sad
Measuring out my baby I discovered that the number one Pulsar weigh's as much as 172g! Makes a wing loading of 13,5g/dm2. Now I knew I had used all the heaviest components build to assemble the ship and even mounted the heaviest battery (2 x Nano-Tech 350mAh), but still the result was a shocker. On the other side I now have a good reason to keep going on with the project  Grin  Otherwise I would not have anything to do during upcoming winter  Wink

Now going down in the workshop to finish the master of the front fuselage....

Urs
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« Reply #29 on: October 27, 2017, 02:11:09 PM »

I dont think 2 separate cells is kosher. But please inform me. I like your model and have similar ideas. Have just received some carbon  from R&G, aus Germany. Jens.
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USch
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« Reply #30 on: October 27, 2017, 03:22:06 PM »

I have found this spec for the batteries:
For F1S (E36)
3.S.2 Characteristic
Nickel Cadmium (NiCad), Nickel Metal Hydrate (NiMH) and Lithium (Li) batteries can be used. Only 2 cell Lithium batteries or up to 6 cell Nickel cells can be used. Other battery related specifications in 3.Q.2 apply.

and
3.Q.2. Characteristics
Nickel Metal Hydride (NiMH) and Lithium (Li) batteries can be used.
Lithium type battery packs must be in “as manufactured” condition with the covering around the cell surface. If more than one cell is used a balancer connector must be fitted.

Now my batteries are "as manufactured" with covering around the cell surface. I just changed the connectors as everybody does and fitted a balancer lead to it. The 2 cells are kept together with transparent tape, but I could also substitute it with a heat shrink tube.

Urs

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« Reply #31 on: October 27, 2017, 03:51:24 PM »
























Only sceptical course asking fellow F1S flyer about coupling 2x300mAh's in parallel...  

Jens

















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USch
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« Reply #32 on: October 27, 2017, 04:55:17 PM »

...in parallel  Huh

and why mounting 2 cells in parallel? The rules dont allow it! You could use 1 cell with 600mAh capacity. But you would have the drawback to double the absorption going somewhere to 35-40A needing a big 40Am ESC. And bigger, heavier cables to connect batterie to ESC and ESC to motor. At the last it will be difficult to find a motor which can absorb 40A at 3,5V.

Urs
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« Reply #33 on: October 27, 2017, 05:27:18 PM »

Sorry for the confusion. I'm talking 2 300mAh 2s in parallel as I do in my rc soarer. I have many of these batteries and their accumulated capacities would come handy for the newer drone motor possibilities for F1S.                                                                                                                                                        Jens   
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USch
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« Reply #34 on: October 28, 2017, 11:45:37 AM »

Whilst looking the tennis semifinal at Basel between Federer and Goffin I had time to take some numbers on PULSAR-1 to keep you informed.

Wing 890x140mm projected (on the paper I had 910mm span  Huh ) = 12,46dm2
Tailplane 400x100mm = 4dm2
Weight in flying order 172,3g
FAI wing loading 10,5g/dm2, real loading 13,8g/dm2
Distance Wing TE-->Tailplane LE = 510mm
CG 120mm from LE = 80%

Wing incidence, measured from center of LE radius to TE = +3,35°
Tailplane incidence, measured from center of LE to TE = +2,3°
Total difference = 1,05°

Motor down 7,4°
Motor right/left 0°

Now next time I have to take some height measurements to have the kettle full.

Urs
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