Why are you going with 10S and not 12 Falcon?
12S would be less amps.
8000mAh look like good flight time
regards Martin

Andy, looking really great! Getting close to SEFF now!!! W

Originally Posted by MaHö

Why are you going with 10S and not 12 Falcon?
12S would be less amps.
8000mAh look like good flight time
regards Martin

11S or 12S could still be an option later. With 8000mah batts going to 12S would add 2 1/4 pounds. Starting out with 10S and will go from there.

Originally Posted by Waltjg

Andy, looking really great! Getting close to SEFF now!!! W

Thanks Walt...see ya in Ga.

Originally Posted by falcon5

11S or 12S could still be an option later. With 8000mah batts going to 12S would add 2 1/4 pounds. Starting out with 10S and will go from there....

Are you talking about the 8000mah zippys?

I was going to do some similar testing with those this summer and see what kind of flight times I got out of a 16lbs low wing load plane with 8000mah on 12s...it'll be over 4.5lbs of but the planes AUW I suspect wont be affected too much.

I was thinking so the weight was lighter the speed would be reduced but that doesn't seem to be the case.

Very interesting.

Falcon,

Are you planing on a thrust test and how would you measure it? What is the minimum it has to have in theroy do you think? The Stu fan sure are nice and im sure will power it great. Are there output numbers they deliver for the assemblies?

Originally Posted by Lmeano_from_MO

Falcon,

Are you planing on a thrust test and how would you measure it? What is the minimum it has to have in theroy do you think? The Stu fan sure are nice and im sure will power it great. Are there output numbers they deliver for the assemblies?

The plan is to just use a digital fish scale I have. I was just going to set it on it's landing gear and go to full throttle and see how it pulls against the scale to get a general idea. Nothing to scientific.

Stumax web site has some performance data I think for his differrant fans and setups.

Plus it sounds like with the miles and miles of clean area you have available to fly, your first takeoff roll will confirm you are good to go!

Ahh test range tonopah, I love the desert I will retire there for sure....

well the full scale T-38 had a pretty low thrust to weight ratio...and they take about a mile to take off in hot weather ..so Andy just needs 1/4 mile to take off

Good lord that is impressive.... just found this thread and I'm glad I did. Good luck!

Was looking at the build album.I started the build on December12th 2011 tomorrow will be 4 months.

That just looks amazing, I can't wait to see the flying videos. Great work falcon. Cheers.

Amazing plane and amazing build schedule. So cool.

Sorry for the late reply...things got a little busy around work. The nerve huh?

Anyways, I got over across the field today and checked in with the guys at Thornton aircraft. They were doing some work on one of the F-5B's, which worked out. Stabs are the same, so I took some measurements and snapped some shots. Turns out the stab is right at a 5 foot chord at the root, and the pivot is 29 inches up from the trailing edge. The spar is shown using the tape measure laid on top of it...

I had forgotten how much better the thinner wheels of the T-38 look versus the fatter F-5's....Snapped a belly shot for ya while I was at it...

Intakes are so different as well.....

Things are looking fantastic on your end...I remember my George Miller T-38 had silver painted in "windows" just to make it easier for me. This thing is gonna really pop with that big clear canopy showing off all of you hard work in the cockpits!!!

Keep up the great work..and remember, the only thing better than a T-38, is a GIANT FRICKIN' T-38!!!!!!!!!!!

Halownr

Originally Posted by Halownr

Turns out the stab is right at a 5 foot chord at the root, and the pivot is 29 inches up from the trailing edge. The spar is shown using the tape measure laid on top of it...

Hey thanks allot for that Halownr, Very interesting. So 5 foot chord is 60" and the pivot is 29" from the trailing edge. puts it a little aft of center. Wow. Now I would like to talk to the engineer who decided to put the pivot point there and why

Thanks again for takeing the time and doing that and posting pics.!!


I hope to have the fans mounted by next weekend and may take it out to the lake bed and taxi it around. I think with the wide gear position it should be pretty stable in regards to ground handling. I will do some semi high speed runs also to see how it handles.