[RCSE] Site update

[Bonfiglio Tullio]

Hi,  guys.
After a too long hiatus, this message to let you know that a new update of our 
site is now on-line.
There are two big news. The first is a description of a promising technique on 
how to build composite flying surfaces. The article shows how to familiarize 
with this very cheap technique, starting with a rudder, but the results are so 
good that I'm already planning to build both elevators and then hopefully both 
wings. And, of course, no CNC !!

BUT the second one IMHO is the best ! 
Ever thought on how a pilot could see and feel  during a DS session !? Now we 
all can see it !
Download the first DS clip shot from an ONBOARD camera, not from the ground as 
usual !!!
I'd really like to be confirmed, as I suspect, that this is world first

Ciao from Italy.
Tullio.

P.S.: BTW take note of the new web address !

Tullio Bonfiglio - Chiavari (GE) - Italy
bonfiglioNOSPAMaen.ansaldo.it
http://voloavelatigullio.mrw.it/ 
   

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[RCSE] How to obtain sectional drawings from a 3 view

[Bonfiglio Tullio]

Hi, guys.
It just happens that I'm tempted to build a 1:9 A-6E Intruder as a PSS glider. 
I'm planning to use the lost foam technique, so I am starting from the 3 view 
of the relevant 'In Action' book. Unluckily this 3 view lacks almost totally of 
the necessary sectional drawings of the fuse.
My request is: does perhaps exist a method/software/'anything on the web' to 
obtain such sections ?
Any answer, both easy or complicated, is well accepted.

TIA.
Ciao from Italy.
Tullio.

Tullio Bonfiglio - Chiavari (GE) - Italy
bonfiglioNOSPAMaen.ansaldo.it
http://voloavelatigullio.mrw.it/ 
   
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[RCSE] Sorry: test delete

[Bonfiglio Tullio]

Tullio Bonfiglio
[EMAIL PROTECTED]
http://space.virgilio.it/ocapofer

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[RCSE] Profili Version 2.03b

[Bonfiglio Tullio]

Hi, guys you all.
I'm pleased to relay a message by Dr. Stefano Duranti on his new revision
2.03b of PROFILI 2, with the announcement of the big future developments.
TNK.

Ciao from Italy.
Tullio.

Tullio Bonfiglio
[EMAIL PROTECTED]
http://space.virgilio.it/ocapofer
  
-Original Message-
From: Stefano Duranti [mailto:[EMAIL PROTECTED]]
Sent: Thursday, November 21, 2002 11:51 PM

Today has been released a new version of Profili, 2.03b.
You can find it as usually in the 'Last version' section of the web site :
http://utenti.lycos.it/profili2
This version fixes some problems in raster file importing (signaled by Ing.
Tullio Bonfiglio) and in the Cm scale of polar graphs (signaled by Ing.
Giuseppe Ghisleri).
There are some minor adjustments too, but no new features.

Actually I'm working on version 2.10 development.
The big version jump arises from a DB scheme modification in this new
release.
But the upgrade will self-convert the old DB to the new one during the first
execution of Profili 2.10.
I modified the DB scheme because of the introduction of new polar analysis
criteria.
With version 2.10 you'll be able to:
- Compute polars for airfoils with a turbolator
- Compute polars for airfoils with flap deflection,
thickness-camber-nose-tail modification, without having to add them to the
archive
- To have a greater elasticity in polars drawings. You'll be able to draw on
the same graph any airfoil at any Re with any modification, to have a better
way
to directly compare  different cases of study, according to your own
criteria (not only the preconfigured type 1-2-3).

I hope this version will be released before January 2003.

Best regards
  Stefano

Stefano Duranti
via della Casazza 43/b
32032 - Foen di Feltre (BL)
Tel. 0439310326
E-mail [EMAIL PROTECTED]
http://utenti.lycos.it/profili2

<>

[RCSE] FW: [xfoil] New version of Profili 2.0

[Bonfiglio Tullio]

Hi, guys you all.

It's with great pleasure (as usual) that I announce you a new major version
of Profili 2.0 by Dr. Stefano Duranti.
See below his message.
With the same pleasure (now it's my turn 8-))) ) I can tell you that it is
now possible to download Profili 2.0 from my site.
You have for now to pass through the Italian pages of the site, but it will
be an easy task 'cause "download" is an international term .

Ciao from Italy.
Tullio.

Tullio Bonfiglio
[EMAIL PROTECTED]
http://space.virgilio.it/ocapofer

-Original Message-
From: Stefano Duranti [mailto:durone@;libero.it]
Subject: [xfoil] New version of Profili 2.0

I send this message to inform that a new major version of Profili, 2.0, has
been released.
Here are some of the news:

- Drawing of leading edge, trailing edge, spars etc
- Drawing of the foam cutting template
- One shot drawing of all the ribs of a trapezoidal or elliptical wing
- advanced filtering of the airfoils by thickness, camber etc
- 500 more airfoils added to the database (more then 2,200 now)
- 20 preprocessed polars for every airfoil in the database (20 different Re
from 30,000 to 500,000), more then 500 hours of processing for my PC
- automatic process of the polars for new airfoils or Re
- New function to generate a new airfoil as a mix of two, you can also
specify the mixing ratio. So you can generate all the airfoil you will find
in a wing with different root and tips ones. Then you can verify the
aerodynamic of your wing by generating the polars for the new airfoils...
- Airfoil libraries managing
- import export from-to .DAT file
- and more

Visit the new web site of Profili by
http://utenti.lycos.it/profili2/
where you can have more info and download your version or order a CDRom.

Best regards.
Stefano - Italy
Stefano Duranti
via della Casazza 43/b
32032 - Foen di Feltre (BL)
Tel. 0439310326
E-mail [EMAIL PROTECTED]
http://utenti.lycos.it/profili2

<>

[RCSE] Looking for Don Ayers (for Stefano Duranti of Profili 2.0)

[Bonfiglio Tullio]

Hi, guys you all.

I'm trying to help Stefano Duranti to contact Don Ayers. 
His old address ([EMAIL PROTECTED]) seems not to work anymore.
Please help him.
TNK

Ciao.
Tullio.

Tullio Bonfiglio
[EMAIL PROTECTED]
http://space.virgilio.it/ocapofer


<>

[RCSE] Re : Astro Flight Charger and NiMH

[Bonfiglio Tullio]

Hi, Simon.
I own an Astro 112 D, and I  have experienced the same thing as you with my
Saft 3000 mAh NiMH.
I'd like to know if any mod exists to be done (even at the factory) in order
to avoid false peaks with NiMH cells.
BTW you're talking of Ri increase detected. How is it done ? Perhaps with
small  periodical discharge peaks applied to the cell under charge, as in
many recent chargers ?
TIA. 

Ciao from Italy.
Tulio
---
Date: Wed, 03 Apr 2002 15:25:38 -0800
From: Simon Van Leeuwen <[EMAIL PROTECTED]>

Unfortunately, the neg. delta peak on the 110 and 112 is too large to
properly detect the cut-off point for NIMH cells. With NiCD's the cell
resistance increase (-10 to -20mV) is what is detected correctly by the
110/112, whereas the NiMH's relies on a smaller window. This is due to
the NiMH cell temperature-rise first, then resistance due to that latent
heating.
My results when using the 112 with 3000 NiMH's resulted in poor peak
detection, and altimately cell damage.
-

Tullio Bonfiglio
[EMAIL PROTECTED]
http://space.virgilio.it/ocapofer

<>

[RCSE] Test, delete !

[Bonfiglio Tullio]

Test, delete !
RTF format.
MIME.


<>

[RCSE] test, delete !

[Bonfiglio Tullio]

Test, delete !

Ing. Tullio Bonfiglio
[EMAIL PROTECTED]

<>

[RCSE] Test, delete !

[Bonfiglio Tullio]

Test, delete !

Ing. Tullio BONFIGLIO 
Ansaldo Energia 
16152 Genoa  -  ITALY 
E-Mail : [EMAIL PROTECTED] 






<>

[RCSE] Re : Kerf Foam Question

[Bonfiglio Tullio]

Date: Wed, 9 Jan 2002 23:04:33 -0800

From: "[EMAIL PROTECTED]" < [EMAIL PROTECTED]
 >

 

Question, Assuming a basic melt speed, what kind of kerf do people use to

cut the templates to provide an accurate core, assuming the thickness of the

eventual FG covering will be very small, like for a HLG. For those using

programs, how do the programs treat the expected kerf?

 

Hi, Chris.

Assuming you have the stomach to carry on the reading of my "bad digestion"
thoughts about the kerf, have a look at my site (
http://space.tin.it/sport/ocapofer  ) in
the Article section.

Ciao from Italy (and good digestion ! 8-

Tullio


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[RCSE] Servo angular range

[Bonfiglio Tullio]

Title: Servo angular range





Hi, guys.


Does any of you know if it is possible and how to reach 120° of angular range on a std servo ?
I measured the std range for a Graupner C5077 piloted on the throttle channel of my FF7 and it normally reaches about 60° (30° per side). By increasing the ATV to 120%  I was only able to reach almost 90°, but nothing more.

The reason of this request is to get airbrakes (with flaperons up as much as possible) in a fast and small (2 m, 80") slope ship, by installing the servos laid down as usual with arm protruding on the lower side, but with the pushrod going through the wing innards to the TE and reaching the upper side of a centrally (thickness sense)  hinged aileron. I checked on the paper the movement and realized I need about 120° of servo movement (from 3 o'clock to 7 o'clock, aileron arm length=1.5 servo arm) to get an aileron range of _30° down to 50° up_ with reasonable linearity around zero, and most of all, without amplification of the servo gears backlash, but with a slight reduction, as good practice dictates.

TIA as usual.
Ciao.
Tullio.


Ing. Tullio BONFIGLIO
Ansaldo Energia
16152 Genoa - ITALY
E-Mail : [EMAIL PROTECTED]
 

[RCSE] Test . Delete

[Bonfiglio Tullio]

Title: Test . Delete





Test.


Ing. Tullio BONFIGLIO
Ansaldo Energia
IMP/ING/AUT - F12 / P5
Via N. Lorenzi, 8
16152 Genoa - ITALY
Ph. : 39 (0)10 655 3267
Fax : 39 (0)10 655 3250 / 3894
E-Mail : [EMAIL PROTECTED]
 

[RCSE] Re: Report on the breaking of the DS speed record

[Bonfiglio Tullio]

Title: Re: Report on the breaking of the DS speed record






From: Barry Baskin <[EMAIL PROTECTED]>


Subject: Report on the breaking of the DS speed record.


This weekend Craig Toutolmin, Dave Reese, my son Gavin, and I made our 
pilgrimage to Parker.


Now my turn with my Millenium Extreme beautifully designed and built by RnR
products


 .then he gets a pop and suddenly it is 174mph then 176mph. I am 
standing rooted to the spot, my half inch square chromoly joiner (perfectly
made by Doug Boyd) is 
bending...


--


Hi, guys,
First of all congrats to the "guy", of course,  then , please, some more info on the plane : here in Italy we are all "boiling". As Dave already knows, I'm the one who, after having read on RCSE about DS by JW, was the first in Italy to do it, more than 2 years ago.

Well we'd like to know more about the model and its structure, specially the wing joiner.
We are all discovering that our single and even double 14 x 3 mm steel blades ( the ones sold by Graupner, I believe) are actually bending permanently after strong DS session, which are surely below your recorded speed, so we are wondering about your "square" half inch one. Is it really a square one or is it a blade ?

Does a picture of the model exist somewhere on the web ? or in Lift Ticket ?
How is the wing built ?


I thank you very much for the info and be known that we all envy you for the ball you had !


Ciao from Italy.
Tullio.



Ing. Tullio BONFIGLIO
Ansaldo Energia
IMP/ING/AUT - F12 / P5
Via N. Lorenzi, 8
16152 Genoa  -  ITALY
Ph. : 39 (0)10 655 3267
Fax : 39 (0)10 655 3250 / 3894
E-Mail : [EMAIL PROTECTED]

RE: [RCSE] DS'ing with no hill

[Bonfiglio Tullio]

Date: Thu, 17 May 2001 17:03:49 +1200
From: "John Ensoll" <[EMAIL PROTECTED]>


And when you get really good at it you can do it on a flat field in the wind
gradient.  I've seen Joe do it in Canterbury New Zealand.
Regards,
John Ensoll.


Really ?
I remember  Martin Simmons and Joe Wurts theorizing about this possibility,
but neither gave me the impression to believe in the practical possibility
to realize it in the real world.
Tell us what happened, please. Any Jpeg on the net on it ?

Ciao.
Tullio (DS addicted since I first heard about it on RCSE)

Ing. Tullio BONFIGLIO
Ansaldo Energia
IMP/ING/AUT - F12 / P5
Via N. Lorenzi, 8
16152 Genoa  -  ITALY
Ph. : 39 (0)10 655 3267
Fax : 39 (0)10 655 3250 / 3894
E-Mail : [EMAIL PROTECTED]
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"unsubscribe" requests to [EMAIL PROTECTED]

RE: [RCSE] C.N.C.

[Bonfiglio Tullio]

Date: Mon, 12 Mar 2001 19:21:53 -0500
From: Mark Drela <[EMAIL PROTECTED]>

>I presume you're calculating the required wire length and driving
>a stepper to change the length? Wouldn't it be simpler to maintain
>a constant tension in the wire? This could be done by terminating
>the wire on a drum driven directly by a DC motor. The motor would
>operate stalled most of the time, with it's stall torque (and hence
>wire tension) controlled by the applied voltage.

I would NOT get rid of the bow.

The problem with anchoring the wire ends to the x,y traverses
is that they must now withstand the very substantial 
wire tension.  And when the wire is "swept" when cutting 
a tapered wing, a significant component of the wire tension
must then be overcome by the stepper motors.  This tremendously
increases the demands on the rigidity of the traverse frames
and the motor power compared to the external-bow design.
The wire tension is huge compared to the other loads.

- Mark


I fully agree, of course, on the consideration about the increase on demand
of rigidity and motor power (Mark, as usual, is topmost clear !).
But, if you really want to keep on this road, if I understand well, you
could also consider to tension the wire by hanging one substantial weight (5
Kg = 10 lbs.?) per side using pulleys. In this way only the structure should
be reinforced and the "complication" would be limited.
Anyhow I would stick with the bow, and a light one.

Ciao from Italy.
Tullio.
Ing. Tullio BONFIGLIO
Ansaldo Energia
ICI/IMT/AUT - F12 / P5
Via N. Lorenzi, 8
16152 Genoa  -  ITALY
Ph. : 39 (0)10 655 3267
Fax : 39 (0)10 655 3250 / 3894
E-Mail : [EMAIL PROTECTED]
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[RCSE] Good mail order shop in Europe

[Bonfiglio Tullio]

Hi guys,
A friend not on this list is asking me to find out a good mail order house
in Europe, 'cause he's about to buy a Fut 9ZAP.  The fact is that, due to
recent custom rules for non European goods, all imported goods shall sport
the CE mark over them. In fact he was about to buy the radio from
Towerhobbies, when he discovered this fact and managed to cut the order with
TH just in time ( kudos also to TH, which understood the situation, even
though the order was already placed ! ).
For this reason I gave him some UK names, but he would also like to know
some addresses from Germany, The Neth, Spain , France etc..
Please answer to me or to him ([EMAIL PROTECTED]) privately.

Ciao from Italy.
Tullio.

Ing. Tullio BONFIGLIO
Ansaldo Energia
ICI/IMT/AUT - F12 / P5
Via N. Lorenzi, 8
16152 Genoa  -  ITALY
Ph. : 39 (0)10 655 3267
Fax : 39 (0)10 655 3250 / 3894
E-Mail : [EMAIL PROTECTED]
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"unsubscribe" requests to [EMAIL PROTECTED]

[RCSE] Servo torque calculation for all moving elevator

[Bonfiglio Tullio]

As per the subject, does anyone know where/how to find a reasonable formula
to calculate this torque.
For your info Multiplex site doesn't work for an all moving elevator, at
least so it seems to me ( equating control surface chord and span with the
wing ones give negative results).
Result will be applied to my next "lethal weapon" for DS.
TIA.
Ciao.
Tullio.

Ing. Tullio BONFIGLIO
Ansaldo Energia
ICI/IMT/AUT - F12 / P5
Via N. Lorenzi, 8
16152 Genoa  -  ITALY
Ph. : 39 (0)10 655 3267
Fax : 39 (0)10 655 3814 / 3894
E-Mail : [EMAIL PROTECTED]
RCSE-List facilities provided by Model Airplane News.  Send "subscribe" and 
"unsubscribe" requests to [EMAIL PROTECTED]