GrayUK

I have decided to seperate the Build info on the Hawk from the old thread to keep it as just the build thread.
Old thread
[link]http://www.rcuniverse.com/forum/m_5043806/mpage_1/key_/tm.htm[/link]

The Hawk i am building is a Fox Composites Hawk, designed for Wren 44 or 54/60 turbines.
It is a composite version of Jims old 90 DF Hawk, upgraded for turbine.

It is a pre-production kit at the moment and is not 'exactly' as will be when released.
The kit weight is 2638gms. That includes fuel tanks, 2x900cc and various formers/uc mounts
Stab bearings, everything except the manual.

Weight 5.8lbs complete with tanks not too bad, add Wren 44, tailpipe should be about 8lbs then 1lb for retracts and about 1,25 lb for radio and a bit for all the bits you forget, could come out dry at about 11lbs.

Production version will be lighter.

A few notes
1) The intakes are much smaller than the AMD Hawk, which appears to be based loosely on my old DF Hawk design and the intake area was designed for 46 Ducted fan.
2) The intakes are slightly oversize not perfect scale but look much more like the real thing.
3) Scale profile is far better than the AMD, much less 'cartoon scale'
4) It will come in Red, Black and also White.
5) Wing fences, underwing, and other detail will be in the 'kit' but as we know this is a pre-production version.
6) The internal wood will be coloured to match the body on the 'kit'

Expected Production kit cost will be around £495 in the UK.

I look forward to building mine, it looks great and comes with a superb pedigree.
This model design has (in one form or another) been around since the early 1980,s.
Originally for a 46 DF, then fitted with Turbax and 91 Df, and here it is, around 25 years later, for Turbines.
It flew really well with a 91, (always a bit underpowered with a 46.)

Now with a MW44 Gold it should be awesome

A video of Trevor Skedge flying his P60 power Hawk is at
[link]http://www.rcuvideos.com/view_video.php?viewkey=4bb0f466464849ffe6d8[/link]

GrayUK

OK Gents
The box is empty

I have started by checking out the parts as received.

First impressions are very good.
All parts present and correct and they are all of a very acceptable quality.
If this is the pre production run then the production kits should be fantastic.

All pieces are well moulded and the formers wood etc all pre cut. This includes servo mounts.
Rudder and ailerons have control horns fitted they just have to be hinged.

The pictures enclosed show the contents of the box except for the moulded canopy and cockpit interior which i will show later.

I will post as i build.

Well done Jim...looks like a winner.

Paul

GrayUK

The oversize intakes mean the model would fly well on a Ramtec and OS 91. The original did, as long as you keep the weight down.
The intakes are oversize but not as much as the AMD or similar. The model looks much more scale.
Pics included show the wing with the pre-made servo locations and UC point.

Other pic shows panels back in pos.

Very nice fit and will be easy to sort out

GrayUK

OK

got started proper tonight.

1st flap installed and hinged,
Not to hard to do.

GrayUK

Ok
Both flaps fitted, now driven by servos.
I am using Hitec 85mg. 3kilo.

Jim has a fully internal drive for the flaps, nice when done but fiddly to install.
Pics show servo and link, and then drive to flap.
The other 2 show the flaps driven by servos to aprox. takeoff position and then landing.
The 2 servos are driven from Flap output and Aux 8, poss. of both can be adjusted independently using endpoint for up and landing.
They switched by a 3 poss. switch. Mid poss. is takeoff and this can be adjusted by using subtrim.

Ailerons tomorrow

GrayUK

OK today did not go as fast as i would have liked...family interfered

Got both ailerons hinged and fitted 1 servo.
Pic 1 shows the servo mount and setup for the flap

Pic 2 shows aileron servo linkage installed.

More tomorrow I hope.

Paul

GrayUK

Tonight’s efforts.

Last wing servo in now and picture 1 shows that with flaps driven to landing poss.

Picture 2 shows the next stage, i am leaving the UC till last as I always do.
The pic shows the tailplane (Stab for you USA guys) halves both pre balanced and the 2 carbon spars with yoke.
Bearings can also be seen.
With a bit of luck I will get the rudder hinged tomorrow and start on the tailplane

Paul

GrayUK

Rudder hinged tonight.
Decided to do the nose former and leg next so I can see which side I need to put the rudder servo.
I am running out of channels on my 9CAP

Paul

GrayUK

Tonight was spent making up the nose leg mount and servo cradle.
The former is supplied but the other bits of wood work i have made.
Just need to get the support fitted for the arm now and i shall fit the nose leg assy into the plane.
I have used 101 HD Springair 100 deg nose unit so the former will be angled backwards.

GrayUK

2 posts tonight.
post 1
Pics show nose leg unit with support added to the pushrod on the tiller arm and installation of nose leg/former with epoxy and glass cloth.

GrayUK

Post 2
Started on the elevator setup.

Pics show marking for the cutout in the fin base.
The cut out.
The elevator actuation system with bearings.
Elevator servo with metal arm installed in the mount (supplied)

Had 1st problem tonight, had to reduce the length of the elevator drive arm on the silver mount by 5mm to stop clashing. I have reported this back to Fox Composites.

More posts tomorrow.

GrayUK

Ok 7 hours today...

Post 1

(pic 1) Elevator servo fitted and tested with linkage
(pic 2) Had to file some 5 mm off the bottom edge of the elevator pivot unit. On full up it touched the bypass duct (test fitted)
Fox Comp have been informed. Minor problem really.
(pic3) Test fitting of Tail plane halves with fin off to check for clear movement.
(pic4) A small section of the underside of the fin needs to be cut away to clear elevator pushrod.
(pic5) shows cut away.

GrayUK

Post 2
(pic1) Rudder servo fitted, this is upside down due to my lack of channels and directions etc. Cable tied back to avoid elevator mechanism.
(pic2) Shows extension lead connections, I secure these with fishing line.
(pic3) shows fin fitted and bolted in place. The bolt is a cap head and is secured from inside the fuselage. In the event of a problem with links or servos the fin can be removed in the future.
(pic4) is a longer shot showing the rear end almost complete.
I have not glued the tail plane halves yet as i find they get in the way during the next stages so i will glue them later.
The elevator unit feels really solid and slop free.
I am using Non Balanced tail plane halves out of choice; I do not believe that it is necessary with this mechanism. If i am right them Fox Comp will not have to balance them in the future. This will be a great weight saving and being so far back will help to prevent need for nose weight.

More tomorrow.

Paul

GrayUK

Not much today chaps.

Had to go flying today
Test flew a friends Eurofighter (very nice).
Also a bit knackered.
Anyway did a sort out and prepared for tomorrow night.
Pic shows bypass air tube supplied with the kit and the Wren tailpipe (excellent).
The tailpipe is slightly over length and I will cut down.
So with a bit of luck it will be engine and tailpipe in tomorrow.

Bye for now.

Paul

GrayUK

Hi all
Not quite as much done tonight, got home had food, fell asleep
But did get a bit done.

Pic 1and 2 shows the epoxy tube supplied fitted, this is for the servo leads. Ali. Tape wrapped around exposed areas.
Pic 3 shows the Wren pipe I had was 104mm over length, I did not know the proper length so ordered a 'long one'.
Pic4 shows bypass duct trial fitted
Pic 5 Shows Wren pipe in bypass for trial fit.
Tomorrow I will fit all of this permanently and maybe the turbine!

GrayUK

Ok tonight’s efforts. Post 1
Almost got the engine in but that will be tomorrow now.

Pic 1 and 2 shows the tailpipe in place with the 10mm gap set.
Pic 3 shows 4 holes made in the back of the tailpipe to accommodate spacers.
Pic4 shows 4 10mm spacers and short screws. The spacers are hollow and filled with epoxy. They are then slid into position and the screw placed through the tube hole and into the epoxy. See pic 5, which shows it in position while epoxy sets.
The spacers are not screwed to the inner tailpipe so the pipe can move with expansion.
The tape is removed afterwards.

GrayUK

Post 2

Pic 1 shows the Wren 44 Gold and the alignment spacer I have made.
Pic 2 shows the spacer and dims.
Pic 3 shows how the spacer 'plugs' into the tailpipe, self-aligning.
Pic 4 shows the glue I am using for the engine mount plates. Great stuff from Colchester models. Seems to glue anything to anything!
Pic 5 1st engine plate fitted with fuel cell in place to get a good position.
Pic 6 both plates in place with both tanks.

The tanks can be removed afterwards.

Well it is moving on now and I may (only may) have it ready to fly this weekend, but we shall see

See you tomorrow

Paul

GrayUK

OK chaps moving on nicely tonight.
Engine is in and all aligned.

Trial fit canopy and hatch and then just some quick mock up pics
See you tomorrow.

Paul

GrayUK

Ok chaps here we go again

Tonight was a bit slow due to family but.

I started by fitting the engine hatch cover
Pic 1 Marking out the slot for the slide catches.
Pic 2 Underside shows the cut-out 30mm long 10 mm from edge and 3mm wide. The hatch is fitted to mark the balsa
Pic 3 shows the catches in place
Pic 4 Catch activated and the hatch in place, taken from underside
Pic 5 and 6 I decided to cut out the air scoops
Pic 7 and 8 shows the glass covered balsa fus strengtheners and radio rail glued in place with RC modellers glue.

More tomorrow.

jason

My Feedback: (1)

Great photos, they really make you look like you know what you are doing... Surely this can't be right?? If you need any advise I know the guy who designed the RCME Hawk years ago, he really knows his stuff and I can put you in touch with him.

Get it ready for Long Marston on the 25th!!!


Jason

GrayUK

Jason

Thank you for the backhanded compliment... See you at the bar

Yes I remember the guy who designed the RCME Hawk, he was a handsome chap, slim, full head of hair,...what happened to him I wonder [sm=cry_smile.gif]

Ok chaps not too much tonight, but should have a good day tomorrow.

Pic 1 shows the canopy catch fitted to the inside of the engine hatch.
Pic 2 shows the catch as seen from the outside.
Pic 3 shows a piece of 3mm ply I have added to the inside of the canopy where the pin comes through.
Pic 4 shows the canopy with some trimming started.

I should be working on the canopy and cockpit interior tomorrow; I want to get the full cockpit complete before installing the radio etc to ensure no clashes.

Anyone know where I can get a full body 1/8 scale RAF pilot?
[sm=71_71.gif]

Spartan Missile

Hello Paul,

I've not been a great fan of the smaller Hawk kits, but this one is lovely ! Can't wait to see the production units, should sell very nicely at that price.

Looking forward to seeing the rest of your build, especially main retract installation.

Good luck with the build and maiden flight.

Cheers.

Jules.

GrayUK

Many thanks Spartan

GrayUK

Post 1 today
More to follow.

Decided to sort out the cockpit first today.

To fit the parts some trimming of the cockpit frame and opening in the fus is needed.

Pic 1 shows all the cockpit vac formed parts.
Pic 2 shows the first 'well' cut and loose fitted.
Pic 3 shows the first intrument panel glued under front shroud.
Pic 4 shows all the parts for 1 seat well cut out and ready for painting.

See you later
[sm=wink_smile.gif]

swissflyer

paul, that's one outstanding build report..

just a print out and we have a build manual..

[sm=thumbs_up.gif]