Here you go.

Thank You Colin and dubd for the references and Pic.

I had set mine up to the suggested position in my BVM manual which is 1 1/4" below the double row of rivets. This just did not look right to me, and after seeing dubd's pic and a couple of pics i found early in this thread from Colin's suggestion. Don't know how I missed these pic earlier. I have come to the conclusion that that 1 1/4" reference can not be right. So I will go back and readjust my stab's neutral to match this info.
The suggested position and what the pics show as positions, my stab if off by 5/16". This would have used up all of my trim adjustment on a maiden that could have been a problem.

Thank You for the help guys.

Well, I decided to go the hard way and did what Inconel did.

It's hard to understand why SM puts the fuel tank 4in. ahead of the CG. Maybe it is because they recomend a very forward CG

I cut of the intakes and install the fuel tank near the CG. That way it will have less to none CG variation during the flight. Also because I have a heavy cockpit with double animatronic pilots, I need a bit of weight in the rear, so decided to move the turbine a bit backwards. My goal is to have a CG at 215-220mm without any weight

I'll post pics next time.

Regards

Nuno

Thanks for the quick reply Anton, This is my first jet, the Hawk 100 will be my first jet build also, and this thread is going to be very helpful,I would like to thank to all the builders and pilots who have contributed to this thread. Hopefully my hawk is being built as we speak, this is the worst part ,the waiting for delivery(LOL).
If any one has any suggestions I would really appreciate their input, Dustin from Jetaddiction.com ,Pablo Fernandez and Rei Gonzalez, have been a great help,in choosing the equipment needed. thanks

J.C. Alvarez

This is the Scheme I chose

WOW. this is my favorite color scheme for Hawk 100, very nice,

Awesome, Now I don't have any doubt of how my plane will look , Justin from BVM said that he does not recall selling that color scheme in the U.S. now the wait will be a little easier knowing how good it will look.

Thanks Anton for the info


J.C. Alvarez

Hi Inconel, where can I buy the linkages you used on the Hawks elevator?

Thanks
J.C. Alvarez

I love this scheme.

and this prototype one same blue color, both are very nice color scheme

I have the BVM large cylinders for the gear door modification. For thos tha thave doen this conversion, can you answer a question or two?

Does anyone know if the screw that goes into the door, through the ball link, goes into anything other than fiberglass/filler? I think there may be a part of an aluminum hinge in there that the threads capture?

I reworked the attachment point for the cyliders so they are not attached to the fuel tank - had to not use the bvm mount but it allows the cylinderes to be attached to the intakes and aft fuse bulkead and not hit the tank. Anyway, I have clearance of the tire by about maybe 3/8" full open with good solid closing. Is that enough?

The doors dont open to 90 degrees. I think I have enough clearance, just hoping air flow wouldnt take away much clearance.

Thanks
Dave

@ j.c.a.

thats normal stuff. I think you can get it everywhere.

For example here:

[link=http://www.der-schweighofer.at/artikel/46271/modellsport?query=gabelkopf]i´m a link[/link]

Thanks, having trouble with the language ref filling out the payment info to Austria the page won't translate I emailed them.

You might want to be careful with the stab position as the elevator mono block stab is not symmetrical!! Both the leading edges and the tailing edges are out from each side. Leading edge by about 4-5mm and the trailing edge by about 3mm from the other side! So expect to be trimming the ailerons depending on your airspeed. As well as the large gap between the gel coat/ fiberglass and the mounting former for the elevator axle blocks. Just a note of caution to all the non builders out there that just assemble and fly.

I am making some progress on my Hawk. I got the main gear doors working with the BVm cylinders, trays mostly done, flaps hinged, elevator mounted....

I will be ready shortly to get the LG in for good. I am wondering what diameter I am lookng for on the main and nose gear for proper wheel pressure (not strut).?


ALso I am wondering if anyone has been able to use the Sullivan clevis on one end and the ball link on the other end for the rudder servo? It seems like it almost needs ball links at each end because of the angle.

Thank you
Dave

For those that built this already, could you give me some advice?

1. Did everyone have to cut the holes for aileron/flap leads in the wing? I also have to get to the wingtip for lights. I am assuming I will go through the ribs inboard/outboard of the servo boxes. Can I reach the wing tip this way or do I need to go fwd of the wood spar?

2. I have installed the BV gear door cylinders. One side is fine, the other side cannot deliver enough clearance and I have tried it 20 different ways already, it is too close for me to leave it this way, less than 3/16 clearance. So I am going to now see about a larger cylinder than supplied by SM but with >1.5" stroke. Anyone had success with a non BV replacement for these cylinders? I think I found a UP version..

3. I have sanded/cleared the aileron clearance and the force to get the aileron down is still quite a bit. Does everyone else have a load free deflection on aileron down? The first 0.5 " of travel is ok but the next .25 is with some resistance. I also have the BV manual and have done the usual clearance, including sanding the ridge on the upper skin of the aileron down too.

Thanks for any help,

Dave

Hi Dave

Yes, you have to drill a hole in the wing root to clear the air line and servo connections. I prefer floating connections to hard conncetions, ie, glued plugs and fuel lines.

I installed wing tip lights by routing the cable in the main spar. you will have acess, no problem.

Try to move the aileron manualy up and down arround 50 times to see if it gets easier. it usualy does. I am using the big bore cilinders from SM with sucess.

Also made some mods in the fuel tank to install it near the CG. Can post pics later on

Regards

nuno

Thanks Nuno,

I just installed some UP 2" stroke cylinders and now the doors open and close well. Unfortunately I have extra (2) BVM cylinders that I am not able to use and bought specifically for this purpose as an add on. The fuel tank fits in between but it sure would be nice if it could fit lower and near the/under the bypass. I may rotate the tank.

Regarding the struts. Did you mean that you replaced the lower "seal" or the Oring on the piston? The seals are not "O" shape. I wasn't sure which parts you replaced? Likai sent me a few replacement "seals" I believe. I wish I had a schematic for the struts.

Will keep plugging along. Will have some pictures to go with the build shortly.

Dave

Hi Dave

I cut off the intake and put the fuel tank near the CG. Will post pics tomorrow if you want.

If you lay down the fuel tank under the bypass, the wheels will hit it. Not possible.....

Regards

Nuno

nuno,
It would be nice to see how you solved the tank issue around the bypass if you have the time to post a picture.

thanks
DD

Hey guys. After a few years of comfortably throwing my Boomerang Sprint round the sky I decided it was time to go for a scale jet so I went ahead and ordered the large hawk and will be my project over the winter. Its going to be in the 2010 scheme with a Jetcat P-140RX for power and DX18 for guidance. I've read through this thread already and probably will do again for any tips like CG location and elevator position and also if anyone has any suggestions i'd be grateful as this is my first Skymaster jet.<div>
</div><div>Regards</div><div>George</div>

Hi

I have just maiden my Hawk after the mods. Dave, sorry but forget to take pics in the inside. next time I went over it, I will shoot a couple.... much smother now

The re-maiden at 3.00min

http://www.youtube.com/watch?v=PBBPU...Ti6usg&index=2

Regards

Nuno

Glad you got to fly it!

George, I will add a list of the things I did shorlty. I am working towards final reassembly and will take some pictures as well.

DD

Nuno,
Was your CG a little forward for those flights?
Dave

Hi Dave

here are some pics about the mod I made. The CG at 215mm still a bit forward, but drop landing had to do with blanked elevator at full flaps- too much exponencial. I used the same expo settings as in the F18 and proved wrong

I plan to move the CG a bit more in the rear at 220mm, maybe even at 230mm. When rolled inverted in other flight (gear retracted), the plane pitched down when inverted, so I guess 225-230mm will be fine. This is a long way from the original 190mm recommended by the manufacturer. No pitch change during flight as "fuel goes by" with tank install near CG. Downside is that main gear doors open because fuse pressure is higher without intake. I have already ordered the BIG Robart cylinders for the job[8D]

Regards

Nuno

Thanks for sharing.

I turned my tank 90 degrees so that I could get the door cylinder to work (U.P. 2 inch stroke) and to continue to use the inlets.

I will have to take some pictures..

Did you use the recommend flaps from the SM manual or per Jack Diaz? I am thinking closer to what Jack suggested for my first outing on Final.

Good luck with it!
Dave