aehaas

Another one showing older and updated air intake scoop and my paint scheme:

sysiek

My Feedback: (176)

Thanks for let join the forum,so I’m doing some changes first to cut the inlets to allow to move the top and bottom tanks back as possible +some extra reinforcements to the elevators formers and main wings formers,make sure that they mark the elevators left and right the airfoil should be up side down the curved side down this will help the straight flight and take off with less elevator up ,this will also prevent to over stress and flutter to the elevators will post pictures with detail installation.

sysiek

My Feedback: (176)

sysiek

My Feedback: (176)

sysiek

My Feedback: (176)

aehaas

What are you guys using as the CG. The "plans" provided by Skymaster is a combination of different models. It says 90-110 mm behind the leading edge of the wing. On my model that puts it at the front bottom of the engine hatch cover. Is this correct?



Note that I did a similar modification as Sysiek showed above to move the main fuel cell backwards somewhat so it is not all in front of the CG. I have not decided yet what to do with the small header tank provided. I'll be using the Jet-Tech fuel cell connections instead of those provided.

AEHaas

sysiek

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kevinthoele

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I have many years flying mine and love it. CG is perfect at 108mm back from break in the leading edge of wing where the outer panel plugs in

aehaas

Is it where I have the line in the picture. Yours may be 8mm behind that but it is basically at this line below, Right?? I want to be sure....

kevinthoele

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No go along the leading edge of your wing until the end of the short stub. From the leading edge at stub it is 108mm about where your ruler has 5 mark

kevinthoele

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The picture in the manual is an F5 not T38. As you can see there is a small scag of wing in front of CG line they measure from. This is similar to what I am saying on your T38

aehaas

Can you show me a picture with an obvious mark of the 108 point on your fuselage. Sorry to be of such trouble but this is the most important thing for a successful maiden and it is not at all clear to me where this point should be. I want to be 100% certain and still it is not clear to me. Call me stupid.

AEHaas

aehaas

Here?

kevinthoele

My Feedback: (1)

See where your square is? The point farthest away from fuse. That is where you measure from NOT next to fuse

kevinthoele

My Feedback: (1)

You can call me if you would like Kevin Thoele 281-615-8455

causeitflies

Kevin, I hope you bring your T-38 back to kentucky. I missed seeing it fly the last time.

causeitflies

CG here...

aehaas

I spoke with Kevin and confirmed his CG line here at 108mm:

sysiek

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kevinthoele

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Use the same on F5 from the drawing on plans. They measure between 90-110 so 108 is good for F5

sysiek

My Feedback: (176)

This should work

jetspud

The 108 cg is we're I have mine flys great . I have bother of my tanks forward of the intakes never thought of doing what y'all did by cutting the intakes .

jetspud

108 from spot B for anyone else

jetspud

Kevin helped me on that c of g also.

aehaas

'Finished the vertical fin today with internal carbon fiber horn I made, just a piece about 1 1/2" long by about a 1/4" wide. I think it's about 1/8" thick or so. The servo tray I made sits into the fin around 1 1/4". There is a cutout on the vertical spar. I still need to reinforce the thin area that was not cut out. I did get the 2" of throw they recommend for good knife edge performance. I used the Savox SV-1254MG because it is lightweight and has plenty of torque. It has plenty as the servo arm is very short. I'll be using 6.6V LiFe batteries for the receiver and a 9.9V pack for the turbine ECU.