RCU Forums - JHH Bae Hawk

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pics5(MADE A HATCH FOR THE NOSE GEAR)

pics6
In my opinion the is a good flying nice looking jet
Thumbs up to Larry at Jet Hanger Hobbies
David

David,

What D/F engine do you use ? I was thinking of putting a BVM. 91 i have spare, i know its alot of power maybe to much but aleast now i have unlimited verticle. i will talk to larry first see what he thinks, just i hate waiting to get a OS.46 D/F engine.

Robert

OS91-Dynamax fan

OS91-Dynamax fan,I had to trim a little off the engine mount rails, it balanced right on the CG
David

I'm getting ready to glue on stabs. Where is neutral on yours?

After trimming on the first flight, the rear of the stabs are flush with the top of the rear of the fuse.
David

DC1163 - Your Hawk

David

Nicely done Hawk. Dafatha will be proud! Especially like those Butt Ugly Aliens!

Sincerely,
Ed
JHH Dealer

Butt ugly aliens, what are you talking about, I have you know they are considered rather handsom where they come from.
David

Anybody having trouble getting thrust tube and fan in? I busted up my thrust tube trying to figure it out

Quote:

Originally posted by Ricco
Anybody having trouble getting thrust tube and fan in? I busted up my thrust tube trying to figure it out

Ricco

Have you contacted Larry about the difficulty your having? He's more than willing to help you out.

Ed
JHH Dealer

Ed,

Do you have any .40 sized Ducted fan engines in stock ?

40 Size DF engines

Robert

I wish I did. I can get them out of the UK, but their that much more expensive. I talked to Great Planes at Toledo and they were going to look into getting more engines, but I haven't heard anything yet.

Let me find the pricing info I had from the UK and I'll let you know how much they are.

Ed

Was lucky to see these guys up close at a base I was deployed to last month. 3 practice airshows a day :D

Where I live, is the winter home of the Red Arrows (RAF Akrotiri air base).

Three practices a day, February to May every year. They start the show season every year here.

This year it will be May 18th. I'll bring more photo's then.

Enjoy last year's display.

BRG
Chris

This might be a dumb question, but hey....

What is the difference between the BAe Hawk that the Red Arrows fly and the T-45 Gosshawk that the Navy flies? Is there some difference between their landing gear? I ask because I know that there is an issue right now with the new Yellow Aircraft Hawk regarding landing gear style.

Hawk Vs. Goshawk

Hi Shaun

The Goshawk is an Americanized version of the BAe Hawk. I don't have all the details handy, but there are changes to gear, engine, structure and avionics. The Goshawk is also built under license in the US and not in the UK.

Just to make the muddy water even clearer:

Quote:
* The Goshawk is still clearly a Hawk, but a Hawk that has been through much reengineering, and has clearly distinctive features. In the final production form, the changes include:

A strengthened airframe and wing, larger tail surfaces, and squared-off wingtips and horizontal tailplane tips. Leading-edge slats were fitted on the wing for low-speed flying and other, smaller changes were made in flight control systems and surfaces. Apparently the wing redesign was a source of dispute between MDD and BAE, with some sources claiming that MDD's bumbling on the wing redesign contributed to the development program's difficulties.

A new cockpit layout that conformed to USN practice and included a "mini-HUD" for simulated weapons training. The Hawk Martin-Baker 10B ejector seats were replace by "Navy Aircrew Common Ejector Seats (NACES)", which are basically Martin-Baker 14 seats manufactured in the US under license.

Two-wheel nosegear that featured tow and catapult connections, and a "stinger" type arresting hook similar to that used on the F/A-18.

Twin airbrakes mounted in front of the horizontal tailplane, reminiscent of those used on the F-86 Sabre, replacing the single belly airbrake of the conventional Hawk.

A single ventral fin, instead of the more conventional pair of fins. Small control surfaces were fitted ahead of the all-moving horizontal tailplane, with the odd name of "smurfs", an acronym standing for the torturous phrase "side mounted unit root fins". The smurfs create vortex turbulence over the horizontal tailplane when the aircraft is at high angles of attack, ensuring that the control surfaces remain effective.

An Americanized Rolls-Royce "Adour F405-RR-401" engine with 2,675 kilograms (5,900 pounds) thrust, which is an Adour 871 with minor modifications.

End Quote.

If you want more info, check out this link: http://www.vectorsite.net/avhawk.html

Ed

One other thing about the T-45 that wasn't mentioned. The Navy bought an entire "TRAINING SYSTEM", not just the plane including interfaces into a state of the art flight simulator and Americanized maintenance techniques. The flight sim, theoretically, would shorten the time needed in the actual airplane. I was in Kingsville for a short time when the T-45 was being implemented into the squadrons. It also replaced 2 planes at the same time, the TA-4 and T-2

John Johnson
Lubbock, TX
(Ex Navy LT)

Wow. I guess this is the place to ask!

RE: JHH Bae Hawk

Gents,

I am assembling my Hawk. I have run into one problem. I am trying to understand the elevator and rudder servo installation. Particularly, how does one make a elevator pushrod that goes over the bulkhead and then into the rudder to connect to the yoke. Mine keeps coming out mussy. Anyone have ideas, or a photo of how they did it?

The other one is the steering for the nose wheel. Really, two cables over a dowel then down to the steering yoke. Any have a better idea?

Thanks,
Dave

RE: JHH Bae Hawk

Dave... where abouts are you? I'd really like to see the Hawk...

RE: JHH Bae Hawk

Quote:

ORIGINAL: dw_crash

Gents,

I am assembling my Hawk. I have run into one problem. I am trying to understand the elevator and rudder servo installation. Particularly, how does one make a elevator pushrod that goes over the bulkhead and then into the rudder to connect to the yoke. Mine keeps coming out mussy. Anyone have ideas, or a photo of how they did it?

The other one is the steering for the nose wheel. Really, two cables over a dowel then down to the steering yoke. Any have a better idea?

Thanks,
Dave
= = = = =
Dave,
I ran into the same problem. I used the forward pre-cut servo slot for the rudder servo, anreplaced the very soft wire with some new music wire, and then perforated the mounting area of the rudder wiith a pin so I could harden the balsa with thin CA.
The Elevator servo could be mounted in the rear bay with a "Z" bend through the servo output horn, and a clevis to the stab. I didn't like the geometry...even though it gives a good solid setup...so I layed my elevator servo on it's side (made mounting blocks to epoxy to the servo mount, then drilled a small hole through the side of the fuselage to allow the servo horn to be placed/removed/adjusted. This gives great geometry of movement, and is very smooth and sturdy. Weight penalty is 1/2 ounce. If I can find my pictures I'll upload them tomorrow....but I think I deleated them (of course!...)
I made a small 1/2 bulkhead from the nose unit mount going around the top of the fuselage to help with the loads, and glued a 1/2 round dowel to the front of it. I covered the dowel with a section of brass tubing to allow the control cables to slide easily...seems to work!

Greg

RE: OS91-Dynamax fan

Greg,

Sounds like a neat approach. A few pics would sure help sort out the details.

Thanks,
Dave