Apogee - RC Groups
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Jul 01, 2012, 01:03 PM
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Discussion

Apogee


Im new in HLGs.
I saw ELF and like it very much. But I knew that it was an update from Mark Drela's Apogee.

So I thougt I could build an Apogee, and if I like it, buy and more complex 1.5m ship later.
Info link http://www.charlesriverrc.org/articl..._apogeehlg.htm


carbon capstrips and trailing edge


It wants to fly!




Lipo 2S 240milis. rx 6004 futaba. servos dymond d47


weight. 110grm. Im happy

Tomorrow it will fly (or not..)
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Jul 01, 2012, 01:43 PM
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Nice! That's completely from scratch? It looks awesome! And 110g is very good for a first attempt. My first micro hand launch came in at about 145g.
Jul 02, 2012, 12:50 PM
Registered User
Yes, from scratch!

Im uploading a youtube vid with the maiden flight today!
It flies very very well! Im very happy!

A member has asked me about the ribs plans. I made my own wing plans in AutoCad. Airfoil Ag03, and top view of the wing in two parts. I have them in PDF. Print in A4 and join later.

Here it is.
Jul 02, 2012, 02:04 PM
Registered User
Here it is the vid!

Apogee DLG (4 min 23 sec)
Jul 02, 2012, 10:54 PM
No conspiracy in theory
skorski's Avatar
A good day!
Looks like you had fun!
Mike.
Jul 02, 2012, 11:34 PM
Registered User
Looks like it flies great! Congrats on a successful maiden! A subfin would help a ton with the tendency to roll on launch and you'd get much higher, but it would add weight too. It looks like a blast to fly though! Good work!
Jul 04, 2012, 02:38 AM
the answer 42 is
MArco it flights great, and again you brake all the DLG rules :P (just kidding) in theory one could not launch a V tail plane DLG but you did it. The apogee was actually designed before the DLG era, so it is in fact a HLG or javelin launched glider.

You are tot the first one thought if you take a look on the "bring the bug back" thread some guy is also doing it.

For better launches you could make a standard DLG tail with sub fin

regards

EZ
Jul 04, 2012, 06:10 AM
Registered User
Hi Alioth does your wing have a solid leading edge/dbox???

Chris
Jul 04, 2012, 06:22 AM
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Gents,

I've seen someone using a x tail where it works like a v-tail but is extended below to form a x-tail, and it launched well and has the benefits of a v-tail.

The control surface was done either above or below the boom.

Regards,
Oz
Jul 04, 2012, 07:13 AM
Registered User
Quote:
Originally Posted by krisch
Hi Alioth does your wing have a solid leading edge/dbox???
Chris
Yes. "dbox" is very light solid balsa. Leading edge is made with a 2mm harder strip balsa. Carbon spar 10x0.5mm
Jul 04, 2012, 07:24 AM
Registered User
Looks great! Just curious though, how many times did you glue your fingers to the ribs putting on those carbon cap strips?
Jul 04, 2012, 07:31 AM
Registered User
Quote:
Originally Posted by daveagain
Looks great! Just curious though, how many times did you glue your fingers to the ribs putting on those carbon cap strips?
At first, twice per rib
Later... with a lot more of practice, only once
Jul 04, 2012, 09:19 AM
Registered User
Quote:
Originally Posted by Edwinzea
MArco it flights great, and again you brake all the DLG rules :P (just kidding) in theory one could not launch a V tail plane DLG but you did it. The apogee was actually designed before the DLG era, so it is in fact a HLG or javelin launched glider.

You are tot the first one thought if you take a look on the "bring the bug back" thread some guy is also doing it.

For better launches you could make a standard DLG tail with sub fin

regards

EZ
As I recall, Mark Drela's Apogee was a tip-launch (underhand) design, more like DLG than javelin. Could check on the CharlesRiverRC.org site, but I'm almost certain.

Marc
Jul 04, 2012, 10:22 AM
Registered User
Quote:
Originally Posted by marctrudeau
As I recall, Mark Drela's Apogee was a tip-launch (underhand) design, more like DLG than javelin. Could check on the CharlesRiverRC.org site, but I'm almost certain.

Marc
I just looked again yesterday at the plans. It had a built-in finger notch on the bottom of the fuse.
Jul 04, 2012, 11:43 AM
Registered User
As I know reading apogee article, first it was developed as a javelin HLG.
This is why There is a finger notch.

Here it is the standard (javelin) 40" Molded Apogee Plan http://www.charlesriverrc.org/articl...e40_molded.pdf
Here it is the Tip Launch Rated http://www.charlesriverrc.org/articl...apogee40Mb.pdf
Diference is about wing spar. But same fuselage and tail.

Later.. it was developed an "squat fuselage" and it says "Why a "squat fuselage"? There were basically two reasons for developing the squat fuselage design. The first is that the finger hole can be much more spacious, which is an advantage if you have "significant fingertips" The second is that it takes the side loads of tip-launch better. Now you know!"

So.. It is a fuselage than can be used for javelin version (this is the reason of the finger hole), or tip launch version of the wing.

But tail, is the same in both versions..
Last edited by alioth; Jul 04, 2012 at 06:45 PM. Reason: correct link