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Filip 400RG

Old 03-29-2007, 09:33 PM
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Default Filip 400RG

Hi Sal,
I have the Filip 400 RG.

I plan to put the elev. servo in the tail like I did on my first one.
I'm concerned that added weight will make the tail boom more likely to crack on harsh landings, which is why I'm considering only one servo.
Do I need rudder to be able to thermal like it was intended?
Or can I just rely on airleron differential?

I plan on an Axi 2826/12, and a 5s 2070 lipo.
Thanks,
Ken Sharp
Old 03-30-2007, 10:20 AM
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Default RE: Filip 400RG

In order to thermal it is best to have a rudder although you can thermal without. You will not have a fully coordinated turn and therefor you will not be as efficient.

The motor and battery sound a bit heavy. why are you going to 5 cells?
Old 03-30-2007, 06:49 PM
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Default RE: Filip 400RG

I was under the impression that a 12 wind is more efficient with 5s? I have some 3s as well. No 4s at the moment.


Thanks for your comments on the rudder.

Your comments on the battery choice are most welcome as well.

Regards,
Ken
Old 04-01-2007, 12:31 PM
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Default RE: Filip 400RG

Using a 3 cell li-Poly of 20C or greater and a cpacity of 2000 or greater the specs are:

13 x 11 prop
38 amps
61 oz thrust
58 mph prop speed
This should work fine, but I am still trying to figure out how such a large motor will fit ot balance in this sailplane
Old 04-02-2007, 09:30 AM
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Default RE: Filip 400RG

Hi Sal,
Thanks for the info.


The reason I'm considering the Axi 2826/12, is bacause in other threads I've checked, some people have had success with the Axi 2826/10 and 3s lipos.
Since I have a 12 instead of a 10, I thought I could use 5s lipos as I thought the 12 could handle it, and still use a 13 x 11 prop.

I also have a Neu 1105/2.5Y w 4.4gb that will fit just fine with a 3s lipo, It's just that I was saving it for a Remmy F5J.

Anyway, before I cut the fuse, I'll take your sage advice and assemble the Filip complete, and then dry fit the Axi first, tape the prop and spinner up front, and then see if it will ballance out.

Two more quick questions please.
1. Will the Axi 2826/12 handle 5s?
2. what is the cg. range of the Filip 400 RG?

Thanks lots,

Ken Sharp
Old 04-05-2007, 11:59 AM
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Default RE: Filip 400RG

You could use the AXI with 5S although it is not designed to do so. the motor rpm goes over 10,000 so this is a little high but workable. You would need to use a 11 x 8 or 12 x 8 prop. The 11 x 8 gouse up to 45 amps draw.

The CG on the Filip is 35-40% back from the root measured at the LE.
Old 04-08-2007, 04:58 PM
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Default RE: Filip 400RG

Thank you Sal.
Old 04-10-2007, 12:05 PM
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Default RE: Filip 400RG

You are most welcome!

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