Javad

Hi Dave,

I see, yes it make sense, at least for early flies, if all goes well then thinking about more attachment,

Maybe we do a test fly before paint

Javad,

Dave Wilshere

Javad

No, it will fly. Paint it as you wish and I’ll get it off the ground and back down again 😉

I’ll check the ailerons properly so I don’t have to reverse half my brain again 😃

Dave

Javad

Haha, I'll make this one taileron, with 4 flaps, so no chance you do test fly with revers aileron ,

Below my first jet, Dave did test fly & helped me to learn how to setup and fly jet , 15th October 2016,:

Javad

Hello Guys,

Little progress on finishing planking on top of fuse, and making canopy. Next step would be to cover the fuse with 25gram glass fibre. Once I finish, I'll use this canopy as a plug to make a mould, would be a challenge as it would be my first time to make a mould

jcterrettaz

My Feedback: (1)

amazing work

kevinthoele

My Feedback: (1)

Awesome job!!!!

Javad

Thanks,

Javad

Thanks,

Javad

Hello guys,

I'm thinking about down-thrust angle, as real one have, Any suggestion please?

Does down trust will help little with a heavy tail? I'm worried if I put Down Trust, it will change trim in low and high throttle !!! any suggestion please

Thanks,

Javad,

Dave Wilshere

Javad

The turbines need to have down angle to stop low pressure air below tailplane causing a climb. Small turbines/pipes will help with separation.

Dave

Javad

Thank you Dave,

As you mentioned, turbines are relatively small, and tail pipes are 56mm in Diameter too, So do you think about 2-3 degree would be okay? or more!!

Dave Wilshere

More, but that looks like up thrust? Back of the pipe should point at the ground when on wheels

Javad

Yep, I just put the pips to show how small they look on tail, as round plywood is 120mm and tail pipe only 56mm. So, 5 degree? or I go up to 90 degree and fly vertical :-)

Dave Wilshere

Javad

Yep, 4-5 degrees sounds about right

Dave

Jeff Worsham

My Feedback: (28)

Very Cool and amazing project you have Javad! Much respect sir!

kevinthoele

My Feedback: (1)

I have flown several F4's My current two have 5 degree down thrust on the pipes. I just used my Iphone level and got plane to 0 and taped a stick to the top of pipe at exit until I had phone at 5 degrees down. Then made screw in mount to hold pipe in place

Javad

Thanks Dave,

Javad

Hello Jeff,

Thank you for your interest,

Javad,

Javad

Hello Kevin,

I'll go for 5 degree,

Assuming your F-4 is trim on 50% power, Does it then decline in full power? or nothing to be notice,

Javad,

Dave Wilshere

Javad

No, it will fly straight, will explain when we next meet...lots of VooDoo in aerodynamics 😄

Dave

Javad

Oki Doki Dave,

Javad

Little going on details, I made the vent& little detail on ruder,

F-4 has as many as details can pin me on my workshop forever, and I don't know how far I will go for details, but for sure I will do some of main details,
,

kevinthoele

My Feedback: (1)

Javad

I have no trim changes in flight(any throttle setting= straight

Javad

Hi Kevine,

Thanks for your reply. I'll go for 5 degree,

Javad,

Javad

Hi Again,

I decided to choose "Lazy Zone" and not having Chute system, so no door:

,