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Old Dec 24, 2008, 09:05 AM
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United States, VA, Herndon
Joined May 2007
980 Posts
Quote:
Originally Posted by smkn951
hello everyone,
well here i go again, up on the chopping block is a 40 in w's version.
originally i planned on 2 70mm 6904, 2w het motors, but after much thought........

Carl
Thats funny... I've got that equipment sitting around and I just finished resizing everything to that same span so I can build this one for that gear. I've got a few other projects on the bench at the moment, but I hope to start this next month. I don't expect it to be a screamer, but it should be a nice home for those fans. I had this 4 cell setup in my old epf f14 and she moved pretty well...

-another Carl-
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Old Dec 24, 2008, 03:20 PM
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Crystal River Fl.
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Smkn' very cool! waiting for more pics and build progress... good luck!!! walt
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Old Dec 25, 2008, 12:27 AM
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kaysee's Avatar
Kuala Lumpur, Malaysia
Joined Aug 2008
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thanx nadim for the pictures. helps a lot.

here is my suke 28", end up auw of 26.5oz. is that heavy for this size? waiting for the right time to maiden.

questions:

1) where is the cog should be?

2) im using my tailerons and ailerons for controls as techdad did. do i need to use my ailerons as elevons as well or just let it function as ailerons and let my tailerons control the pitch.

3) if im planning on using my ailerons as elevons, do i need to make the pitch opposite to the tailerons or same.

tia.
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Old Dec 25, 2008, 08:20 AM
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Canada, ON, Newmarket
Joined Dec 2005
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FYI,

Here's a picture of mine. 60" long by 42" wing span. In the process of changing from two motor's to one large one. I run it with tailerons and ailerons/elevons all working in the same direction. You might be able to see it in the picture. All control surfaces are up.

The plane handles very well without thrust vectoring and the balance point is excactly the same as shown in Steve S's design.
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Old Dec 25, 2008, 11:07 AM
Bob Templeton
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USA, AL, Huntsville
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Awesome! It looks great. I can't wait for the video.
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Old Dec 25, 2008, 09:53 PM
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United States, HI, Kapolei
Joined Jan 2007
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gdimonte,
what power system were you using and what are you planning on using?
what kind of performance are you expecting?
TIA
Carl
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Old Dec 26, 2008, 06:39 AM
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Kuala Lumpur, Malaysia
Joined Aug 2008
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gdimonte, that's one big jet u have there. thanx for the tips.

however, i just reallise that my battery wont keep up with my motor amp needs. i'm planning on using a 2500kv apex 450 blm which rated 24A with 6" prop, but i just have 2 3s 15c 1550mAh which if im correct, will give me a peak amp of 22.5A. so got to postpone my maiden till my new battery arrive. 3s 20c 2200mah should do it i think.
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Old Dec 26, 2008, 07:33 AM
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Canada, ON, Newmarket
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Carl,

The original 2-motor setup was a pair of Towerpro 2409-12a's running on two 2200 20c batteries each with 3-blade 8x4 prop's running close to the 25amp max rating. Measured thrust of the combined motors was around 1600gm. This is not a good power set-up but, I had the motors and it got me into the air to test things out.

The replacement motor is a Turnigy Aerodrive SK3536-1400 running a 9x5 3-blade prop. Measured thrust was around 2200gm on a 4s battery. Current UAW for the plane is 1800gm.

As far as performance goes, I prefer vertical climb over all out speed. The bigger motor should be close to unlimited vertical with the prop I have. There's alot more room for bigger props and batteries to use with this motor. I'll experiment once it's flying again.
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Old Dec 26, 2008, 06:09 PM
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United States, HI, Kapolei
Joined Jan 2007
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a little more progress

hello everyone,
well here's a couple more pics of the build.
power set up:
2 ea don's 2700 kx motors with 6x4 counter rotating props.
2 ea hs-81
2 ea 60 amp esc
1 bec
ar 6000
4s 2250
AUW with out paint sofar is 2 lbs 12.2 oz
do you think it'll fly with this set up?
TIA
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Old Dec 27, 2008, 03:47 AM
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the Netherlands
Joined Jul 2008
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Help!!! I cant stand it anymore so I decided to begin with the SU 37 as well.

Last night i cut all templates and all firstly required pieces from depron.

How bad is it when I'm going for ailerons and with twin TV. I realized that the ailerons are an Option when not using TV, feel a bit noobish having already cut them off now.
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Old Dec 27, 2008, 05:33 AM
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Linköping Sweden
Joined Nov 2006
960 Posts
Quote:
Originally Posted by steven4601
Help!!! I cant stand it anymore so I decided to begin with the SU 37 as well.

Last night i cut all templates and all firstly required pieces from depron.

How bad is it when I'm going for ailerons and with twin TV. I realized that the ailerons are an Option when not using TV, feel a bit noobish having already cut them off now.
simply glue them on again.....
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Old Dec 27, 2008, 05:37 AM
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Linköping Sweden
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nice planes guys

kaysee nice job shaping the plane, it looks real good

Carl she looks good...I have an request for you, please video the maiden

Nadim
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Old Dec 27, 2008, 10:28 AM
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the Netherlands
Joined Jul 2008
97 Posts
Ive changed my thinking.
Glueing them on again is not an option Nadim

i'm going for two 2212-06 with a 5.5x4.75 maybe 6x4's with TV and ailerons.


Is this going to be too heavy?
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Old Dec 27, 2008, 11:39 AM
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Kuala Lumpur, Malaysia
Joined Aug 2008
171 Posts
i now this thread started last year, and some of you guys have build it since. i wander how many of you guys still flying this jet regularly.
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Old Dec 27, 2008, 01:26 PM
Bob Templeton
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USA, AL, Huntsville
Joined Apr 2007
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Quote:
Originally Posted by kaysee
i now this thread started last year, and some of you guys have build it since. i wander how many of you guys still flying this jet regularly.
I certainly am! I love both my Flankers!
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