RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

1:4 scale MB339 jet build/re-fit

Reply
Old 01-22-2008, 05:44 PM
  #1
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 1:4 scale MB339 jet build/re-fit

This is a thread detailing the work to re-fit and upgrade a 'one off' Aermacchi MB339.

Here's the background as I know it, although I am sure there are a few bits missing!

The fuselage was moulded from a plug made for a static display model for Aermacchi by Fritz Heer in Switzerland, the plug was not suitable for a model designed for turbine power, so numerous modifications were made by Fritz before the final fuselage was usable.

The wings were made from a foam core base covered in two layers of carbon fibre cloth.

The fuselage and wings are complete and painted in the 'frecce tricolori', landing gear is machined from solid.

The task ahead is to re-fit this jet and bring it into a position where it can be flown, as to date it has never left the ground under its own power

Turbine is a AMT Olympus, Weatronic rx, air drivern doors and a hydraulic system to run the gear. Also navigation and landing lights are planned, smoke and a few other extras.

Its about 2.9m long and the span (tip to tip) is roughly 2.6m - estimated weight from the original builder was just under 20kg.

First job is to remove all the old remaining equipment, evaluate and upgrade where required.

All the servos appear to be Hitec, so the owner is changing these to JR8711s and others where required.

Here are a few pics to start off, many more as I go along. Any experts on the jet please pipe in as I would be happy to hear about little details, especially on the nav and landing light set-up.

marc.

Attached Thumbnails
Click image for larger version

Name:	Jh14717.jpg
Views:	70
Size:	104.0 KB
ID:	858299   Click image for larger version

Name:	Xs58707.jpg
Views:	45
Size:	91.7 KB
ID:	858300   Click image for larger version

Name:	Pv53224.jpg
Views:	56
Size:	104.9 KB
ID:	858301   Click image for larger version

Name:	Bu57851.jpg
Views:	42
Size:	63.3 KB
ID:	858302   Click image for larger version

Name:	Sd43055.jpg
Views:	40
Size:	43.0 KB
ID:	858303   Click image for larger version

Name:	Lc48277.jpg
Views:	55
Size:	66.5 KB
ID:	858304   Click image for larger version

Name:	Ac64838.jpg
Views:	54
Size:	76.0 KB
ID:	858305   Click image for larger version

Name:	Yx81279.jpg
Views:	45
Size:	80.9 KB
ID:	858306  

Click image for larger version

Name:	Ts22803.jpg
Views:	61
Size:	92.8 KB
ID:	858307   Click image for larger version

Name:	Wj51970.jpg
Views:	38
Size:	80.4 KB
ID:	858308   Click image for larger version

Name:	Nt83763.jpg
Views:	36
Size:	75.8 KB
ID:	858309   Click image for larger version

Name:	Mw92126.jpg
Views:	57
Size:	91.7 KB
ID:	858310  
marc s is offline  
Reply With Quote
Old 01-22-2008, 05:48 PM
  #2
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

more..
Attached Thumbnails
Click image for larger version

Name:	Ay75916.jpg
Views:	46
Size:	78.6 KB
ID:	858312   Click image for larger version

Name:	Ez83881.jpg
Views:	47
Size:	92.7 KB
ID:	858313   Click image for larger version

Name:	Hm23630.jpg
Views:	40
Size:	94.8 KB
ID:	858314   Click image for larger version

Name:	Fz73126.jpg
Views:	28
Size:	78.6 KB
ID:	858315  
marc s is offline  
Reply With Quote
Old 01-22-2008, 05:49 PM
  #3
schroedm
 
schroedm's Avatar
 
Join Date: Jul 2002
Location: SevenoaksKent, UNITED KINGDOM
Posts: 5,193
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

You're a busy boy mate!! Look nice - is it for who I think it must be for?
schroedm is offline  
Reply With Quote
Old 01-22-2008, 05:53 PM
  #4
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Think so - how does it compare to the Hawk for size?

marc.
marc s is offline  
Reply With Quote
Old 01-22-2008, 06:33 PM
  #5
schroedm
 
schroedm's Avatar
 
Join Date: Jul 2002
Location: SevenoaksKent, UNITED KINGDOM
Posts: 5,193
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

oh, I think mine's a little big bigger than his
schroedm is offline  
Reply With Quote
Old 01-23-2008, 04:12 PM
  #6
SCALEFANATIC
 
Join Date: Feb 2003
Location: DUBLIN, IRELAND
Posts: 219
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Marc,
www.cuccoloaeromodelli.com make the 1/4 scale kit you have with foam wings and fibreglass fuselage. Retracts are from eurokit. I am waiting for the new Airworld kit when out,
Regards,
Brian Hewson
SCALEFANATIC is offline  
Reply With Quote
Old 01-27-2008, 06:30 PM
  #7
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Working currently on the front and cockpit areas.

Internally things needed tidying up, some of the cockpit formers were not in horizontal so have had to modify and shim them, removed the front gear door air ram, as I am looking to use a servo to run the doors using a servo slow, to give a better scale look, especially as the gear is hydraulic.

The original cockpit deck was carbon foam sheet, and to me did not look very nice, so as weight is needed in the nose have made the first of two cockpit areas using patterned aluminium sheeting.

Painting the inside of the fuselage in a grey cellulose paint to improve the overall appearance.

Slighlty modified the original air brake servo mounting, sprayed it black and fitted new mounting plates.

Struggling with the rudder set-up (posted a new topic for help)

Weatronics and more gear here in the week so will start to plan the install and equipment.

marc.
Attached Thumbnails
Click image for larger version

Name:	Bz79558.jpg
Views:	29
Size:	82.0 KB
ID:	862807   Click image for larger version

Name:	To45591.jpg
Views:	37
Size:	59.8 KB
ID:	862808   Click image for larger version

Name:	Hn25391.jpg
Views:	26
Size:	69.7 KB
ID:	862809   Click image for larger version

Name:	Jc86368.jpg
Views:	25
Size:	49.5 KB
ID:	862810   Click image for larger version

Name:	Eq87343.jpg
Views:	29
Size:	33.7 KB
ID:	862811   Click image for larger version

Name:	Md52478.jpg
Views:	45
Size:	39.4 KB
ID:	862812   Click image for larger version

Name:	Wy48750.jpg
Views:	31
Size:	39.4 KB
ID:	862813   Click image for larger version

Name:	Ut67121.jpg
Views:	31
Size:	62.4 KB
ID:	862814  

Click image for larger version

Name:	On95147.jpg
Views:	48
Size:	86.5 KB
ID:	862815   Click image for larger version

Name:	Ug43386.jpg
Views:	35
Size:	84.4 KB
ID:	862816   Click image for larger version

Name:	Nt83082.jpg
Views:	29
Size:	75.1 KB
ID:	862817  
marc s is offline  
Reply With Quote
Old 02-01-2008, 06:00 PM
  #8
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Finished the front gear door mechanism, which I have modified to run from a JR161 servo rather than air, managed to mount the servo nice and neat above where the air cylinder used to mount. The throw is good, and with the Weatronic and Tx programming a 'servo slow' setting will give a nice scale llike operation.

Managed to squeeze an 8411 into the steering cradle, replaced the old secondary door springs with repositioned and longer new items, which are more accessible for routine maintenance than the originals.

Made a battery restraint just aft of the rear front gear former, to house the 3 x 6 cell Nimh 3700's that will power the Rx and hydraulic systems, two aluminium straps will secure the packs down (still to make)

Hydraulic equipment mounted on its own panels, with the distribution valve and oil reservoir yet to be fitted.

Its a treat having space in which to work

marc
Attached Thumbnails
Click image for larger version

Name:	Wu61778.jpg
Views:	45
Size:	38.8 KB
ID:	867251   Click image for larger version

Name:	Aw70534.jpg
Views:	32
Size:	102.6 KB
ID:	867252   Click image for larger version

Name:	Af89545.jpg
Views:	41
Size:	87.1 KB
ID:	867253   Click image for larger version

Name:	Ey71474.jpg
Views:	35
Size:	99.9 KB
ID:	867254   Click image for larger version

Name:	Lx21708.jpg
Views:	54
Size:	99.9 KB
ID:	867255   Click image for larger version

Name:	Qh66190.jpg
Views:	37
Size:	85.3 KB
ID:	867256  
marc s is offline  
Reply With Quote
Old 02-09-2008, 06:41 PM
  #9
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Latest.

Re-made the elevator servo mounts as the originals were secured using heat shrink and a flexible adhesive, which although probably OK was not considered safe enough for the 8411's. Made new servo covers using FR4 board and secured to this with some BVM 'L' brackets and recessed bolts.

Added a hatch spring to the nose door as it kept closing under its own weight, which became a little frustrating!

Nose gear all in, kero pump and solenoid mounting plate made (FR4) and starting to position items on main board.

Smoke tank assembled, although looks to be a tight fit under the turbine (will post pics when test fitted).

Added a few pics of the jet taken today on a very sunny and warm February day!

marc.
Attached Thumbnails
Click image for larger version

Name:	Yw67441.jpg
Views:	55
Size:	66.7 KB
ID:	874166   Click image for larger version

Name:	Aw70589.jpg
Views:	26
Size:	71.9 KB
ID:	874167   Click image for larger version

Name:	Bh94730.jpg
Views:	32
Size:	64.2 KB
ID:	874168   Click image for larger version

Name:	Zs51026.jpg
Views:	23
Size:	71.5 KB
ID:	874169   Click image for larger version

Name:	Rc94724.jpg
Views:	28
Size:	131.7 KB
ID:	874170   Click image for larger version

Name:	Uk78039.jpg
Views:	21
Size:	102.1 KB
ID:	874171   Click image for larger version

Name:	Ce71639.jpg
Views:	29
Size:	144.6 KB
ID:	874172   Click image for larger version

Name:	Us65167.jpg
Views:	35
Size:	97.7 KB
ID:	874173  

Click image for larger version

Name:	Sq17345.jpg
Views:	24
Size:	53.3 KB
ID:	874174   Click image for larger version

Name:	Lx12070.jpg
Views:	31
Size:	128.5 KB
ID:	874175   Click image for larger version

Name:	Kp70851.jpg
Views:	39
Size:	106.8 KB
ID:	874176   Click image for larger version

Name:	Eo63707.jpg
Views:	35
Size:	72.5 KB
ID:	874177  
marc s is offline  
Reply With Quote
Old 02-10-2008, 12:54 PM
  #10
ThomasP
 
Join Date: Sep 2005
Location: Newark-On-Trent, UNITED KINGDOM
Posts: 369
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Marc,

It is looking really nice, maintaining standards I see.

P.S Did you see my place of work in the news today?

Regards,

Alistair.
ThomasP is offline  
Reply With Quote
Old 02-10-2008, 01:04 PM
  #11
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Alistair,

Hi, unfortunately not - what's it in for?

marc.
marc s is offline  
Reply With Quote
Old 02-14-2008, 08:27 AM
  #12
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Most of the equipment trays now done.

New 'ball' UAT mounted along with smoke pump - wish these things were designed with an easier mounting facility!

Electronic landing light and navigation equipment mounted with dedicated battery, hydraulic system mounted and waiting some modified Festo fittings.

Main battery tray full with compliment of 4 packs, air brake servo and linkage complete.

Added the main Weatronic isolation panel into the front nose section, tidied up the nose gear servo lead routing.

Modified the stab servo mounts and now just need to match the paint!

Onwards.............

marc.
Attached Thumbnails
Click image for larger version

Name:	Zx70626.jpg
Views:	24
Size:	102.1 KB
ID:	878301   Click image for larger version

Name:	Cx75092.jpg
Views:	26
Size:	45.1 KB
ID:	878302   Click image for larger version

Name:	Di11342.jpg
Views:	54
Size:	85.2 KB
ID:	878303   Click image for larger version

Name:	Ga78191.jpg
Views:	38
Size:	49.3 KB
ID:	878304   Click image for larger version

Name:	Xi60231.jpg
Views:	30
Size:	94.9 KB
ID:	878305   Click image for larger version

Name:	Vm82656.jpg
Views:	42
Size:	100.8 KB
ID:	878306   Click image for larger version

Name:	Su35492.jpg
Views:	27
Size:	109.6 KB
ID:	878307   Click image for larger version

Name:	Xw75920.jpg
Views:	50
Size:	95.2 KB
ID:	878308  

Click image for larger version

Name:	Ml87797.jpg
Views:	28
Size:	97.8 KB
ID:	878309   Click image for larger version

Name:	Gs85637.jpg
Views:	39
Size:	82.5 KB
ID:	878310   Click image for larger version

Name:	Tz13575.jpg
Views:	25
Size:	71.9 KB
ID:	878311   Click image for larger version

Name:	Pa14148.jpg
Views:	26
Size:	128.5 KB
ID:	878312  
marc s is offline  
Reply With Quote
Old 02-29-2008, 06:39 PM
  #13
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Back from hols so on with the build.

Moved the Weatronic to the fuselage side, which puts if out of close proximity to pumps and turbine ecu.

Decided to make things really hard for myself and install all the charging (x6) and switches (x4) Weatronic data socket into the front nose section. Don't ask why, it just seemed good to have all the 'electrical stuff' under one hatch. I had already made and mounted all the electrical stuff on a panel in the middle hatch section, but was not happy - so put myself through an evening of pain.

With a little work on the connections, it looks as if it will all go in, hopefully I'll have the sockets and switches mounted tomorrow.

Plumbed the 'ball' UAT.

Later.
Attached Thumbnails
Click image for larger version

Name:	Lj23701.jpg
Views:	32
Size:	78.0 KB
ID:	891807   Click image for larger version

Name:	Ni23649.jpg
Views:	34
Size:	75.3 KB
ID:	891808   Click image for larger version

Name:	Xd80651.jpg
Views:	37
Size:	76.2 KB
ID:	891809   Click image for larger version

Name:	Oi14512.jpg
Views:	34
Size:	82.7 KB
ID:	891810   Click image for larger version

Name:	Se45939.jpg
Views:	53
Size:	69.3 KB
ID:	891811  
marc s is offline  
Reply With Quote
Old 03-01-2008, 04:10 PM
  #14
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

latest:

Switches and charging points all wired and mounted, and the ribbon cable routed to connect the data point and immobiliser panels for the Weatronics.

Servo screw (yet to be fitted!)

Pics of front nose section before and after............and some others



Attached Thumbnails
Click image for larger version

Name:	Tr49911.jpg
Views:	34
Size:	92.8 KB
ID:	892527   Click image for larger version

Name:	Oj26598.jpg
Views:	27
Size:	38.2 KB
ID:	892528   Click image for larger version

Name:	In27927.jpg
Views:	40
Size:	92.8 KB
ID:	892529   Click image for larger version

Name:	Dw65793.jpg
Views:	25
Size:	50.7 KB
ID:	892530   Click image for larger version

Name:	Ju12892.jpg
Views:	27
Size:	62.0 KB
ID:	892531   Click image for larger version

Name:	Yp92344.jpg
Views:	27
Size:	75.8 KB
ID:	892532   Click image for larger version

Name:	Fh79807.jpg
Views:	25
Size:	45.7 KB
ID:	892533   Click image for larger version

Name:	Rq55833.jpg
Views:	30
Size:	93.9 KB
ID:	892534  

marc s is offline  
Reply With Quote
Old 03-11-2008, 05:00 AM
  #15
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Install so far.

Have had to do some major work on the main gear legs, the springs supplied were not capable of supporting the jet so have had to work through a plan to experiment with different springs, but in order to do this the internal diameter of the legs needed to be machined out a few mm so that UK metric springs would fit - I want to say a big thanks to Danny Wenham for his help in this job, and for the superb aluminium 'manifolds' he machined up for me as well, they are really slick

Pictures tell the story, but not far to go on the main equipment, then comes turbine and smoke followed by the rudder modification and replacement wing servos..............

Attached Thumbnails
Click image for larger version

Name:	Jh17262.jpg
Views:	34
Size:	82.9 KB
ID:	900613   Click image for larger version

Name:	To44953.jpg
Views:	19
Size:	70.2 KB
ID:	900614   Click image for larger version

Name:	Hm24226.jpg
Views:	22
Size:	104.7 KB
ID:	900615   Click image for larger version

Name:	Wq43834.jpg
Views:	24
Size:	100.5 KB
ID:	900616   Click image for larger version

Name:	Bm75752.jpg
Views:	26
Size:	100.3 KB
ID:	900617   Click image for larger version

Name:	Tk76420.jpg
Views:	28
Size:	102.6 KB
ID:	900618   Click image for larger version

Name:	Ln12615.jpg
Views:	28
Size:	101.3 KB
ID:	900619   Click image for larger version

Name:	Ih25343.jpg
Views:	34
Size:	74.3 KB
ID:	900620  

Click image for larger version

Name:	Gf67294.jpg
Views:	28
Size:	37.9 KB
ID:	900621   Click image for larger version

Name:	Bo68682.jpg
Views:	45
Size:	44.5 KB
ID:	900622  
marc s is offline  
Reply With Quote
Old 03-11-2008, 01:53 PM
  #16
MF Boy
 
Join Date: Jan 2008
Location: London, UNITED KINGDOM
Posts: 53
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Ah its for Ali
or is for you Mark?

Matt
MF Boy is offline  
Reply With Quote
Old 03-11-2008, 02:03 PM
  #17
InboundLZ
 
InboundLZ's Avatar
 
Join Date: Oct 2004
Location: Las Vegas, NV
Posts: 1,944
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

The switches you are using, they JR? It looks like heavy duty cable coming out of them. What say you?

The build looks really professional!
InboundLZ is offline  
Reply With Quote
Old 03-12-2008, 07:42 PM
  #18
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Switches are heavy duty JR ones.
marc s is offline  
Reply With Quote
Old 03-16-2008, 12:41 PM
  #19
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

update.

Main turbine hatch now is hinged and sprung, tried a couple of hinge types had lying around but none gave the right opening spacing so decided to make three hinges from FR4, strengthened each where it mounted to the hatch and worked out a spring fixing point to both fuselage and hatch to give it that sprung feel, now swings open when the release is made and stays there until closed.

Had some issues with a front hinge on the nose leg gear door, one just sheered off while moving the door to the closed position so then had to work out the best way to replace the broken hinge.

As the old hinge was secured very close the the door cut out so I opted to remake the mounting plate for the hinge as there just did not seem to be sufficient 'meat' to refix with screw holes literally on the fuselage edge. Finally made a couple of very 'sharp' pointed triangle fillets which were fixed to the vertical panel immediately behing the door opening, this allowed a greater surface area for glueing and so far seems to have worked out well - after replacing the broken hinge the good one had to come off so it could match the other!

The smoke tank has been causing a headache, and although not yet complete I have decided to have a go at making one to fit the space allocated, if it fails will resort back to plan A.

Made a foam plug from some 1.5" foam which I hot wire cut using two ply formers, then glued 5 together to make the tank shape. Covered in profilm and applied three good layers of wax release. I am now in the process of covering the mould in 5-6 layers of glass cloth and finishing resin. Once this is done plan to cut the tank in half widthwise, remove plug, add fittings with Aeropoxy and re-close using glass bandage and resin.

Phots attached, including the hydraulic distribution manifolds (thanks Danny) now fitted with the festo elbows.

marcs

Attached Thumbnails
Click image for larger version

Name:	Ay73423.jpg
Views:	38
Size:	80.5 KB
ID:	904818   Click image for larger version

Name:	Yt61146.jpg
Views:	38
Size:	70.9 KB
ID:	904819   Click image for larger version

Name:	Ze86228.jpg
Views:	32
Size:	71.7 KB
ID:	904820   Click image for larger version

Name:	Ex69212.jpg
Views:	34
Size:	31.4 KB
ID:	904821   Click image for larger version

Name:	Mx23851.jpg
Views:	33
Size:	29.7 KB
ID:	904822   Click image for larger version

Name:	Pg62724.jpg
Views:	29
Size:	66.6 KB
ID:	904823   Click image for larger version

Name:	Ru34153.jpg
Views:	27
Size:	36.9 KB
ID:	904824   Click image for larger version

Name:	Wv73077.jpg
Views:	28
Size:	33.7 KB
ID:	904825  

Click image for larger version

Name:	Tr21265.jpg
Views:	37
Size:	54.8 KB
ID:	904826  
marc s is offline  
Reply With Quote
Old 03-26-2008, 06:09 PM
  #20
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Been a bit lax in posting but here are some more picks of the work done over the last few weeks.

The rudder originally connected to the servo via the star type servo horn which was screwed to the base of the rudder itself, when I tried to remove the rudder and servo it was almost impossible to get at the servo, and once finally removed for inspection one lug was totally snapped off so leaving three screws which were not totally secure. More of concern was that there was no real way to check that the rudder was actually seating fully into the splines on the servo, so alternative servo drive was required.

Changed over the wing gear door air opening system to a servo driven one, mainly so the servo slow on the front gear doors will work in conjunction with the main gear doors, giving a better scale opening and closing speed.

Installed the 'fill' panel just aft of the cockpit area under a hatch.

Smoke tank is now made, released from the former plug and cut in half, fitting the BVM hardware now and will re-close and cover in a few more layers of glass cloth and resin before pressure testing etc...

pics...
Attached Thumbnails
Click image for larger version

Name:	Lj23982.jpg
Views:	29
Size:	43.6 KB
ID:	914277   Click image for larger version

Name:	Cx75461.jpg
Views:	29
Size:	40.9 KB
ID:	914278   Click image for larger version

Name:	Hn25373.jpg
Views:	33
Size:	60.3 KB
ID:	914279   Click image for larger version

Name:	Fy72460.jpg
Views:	30
Size:	65.1 KB
ID:	914280   Click image for larger version

Name:	Ju13886.jpg
Views:	50
Size:	91.2 KB
ID:	914281   Click image for larger version

Name:	Hy34843.jpg
Views:	38
Size:	59.0 KB
ID:	914282   Click image for larger version

Name:	Jl93073.jpg
Views:	29
Size:	41.1 KB
ID:	914283   Click image for larger version

Name:	Po48959.jpg
Views:	36
Size:	53.6 KB
ID:	914284  

Click image for larger version

Name:	Yw38816.jpg
Views:	42
Size:	98.4 KB
ID:	914285  
marc s is offline  
Reply With Quote
Old 03-27-2008, 05:07 AM
  #21
schroedm
 
schroedm's Avatar
 
Join Date: Jul 2002
Location: SevenoaksKent, UNITED KINGDOM
Posts: 5,193
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Marc,

Another work of install art!

So, what you working on next?

M
schroedm is offline  
Reply With Quote
Old 03-28-2008, 05:17 AM
  #22
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Update.

Mounted the fuel pump and two solenoids with plumbing and re-made the hydraulic reservoir mounting plate as the original reservoir has been modified by the manufacturers MTH to simplify the air bleed arrangement (thank you to Peter Hausl), the new system also now incorporates a plastic pouch which helps protect the fluid bag which could be vunerable to damage.
Attached Thumbnails
Click image for larger version

Name:	Ax73088.jpg
Views:	30
Size:	106.9 KB
ID:	915519   Click image for larger version

Name:	Cx76500.jpg
Views:	34
Size:	104.9 KB
ID:	915520   Click image for larger version

Name:	Nt46137.jpg
Views:	29
Size:	91.1 KB
ID:	915521  
marc s is offline  
Reply With Quote
Old 03-28-2008, 11:48 AM
  #23
AndyAndrews
 
AndyAndrews's Avatar
 
Join Date: Feb 2007
Location: Little Rock, AR
Posts: 6,026
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit


Quote:
ORIGINAL: marc s

Update.

Mounted the fuel pump and two solenoids with plumbing and re-made the hydraulic reservoir mounting plate as the original reservoir has been modified by the manufacturers MTH to simplify the air bleed arrangement (thank you to Peter Hausl), the new system also now incorporates a plastic pouch which helps protect the fluid bag which could be vunerable to damage.
My God, that looks like a Refrigeration unit.
AndyAndrews is offline  
Reply With Quote
Old 04-01-2008, 04:05 PM
  #24
marc s
Thread Starter
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,172
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Latest.

Finally finished the smoke tank, it holds 2.5ltrs, had no holes in it (result!) and fits in the space it was made for!

Decided to mount it via carbon rods through brass tubes, which are glued to each side of the tank. The tank sits between two formers so the cf rods pass through the former on one side of the tank, through the brass tubes and out through the second former, seems to work well (copied from the original main tank mounting system) and allows very quick removal etc if reqired - takes a bit of alignment time though.

Added the two overflow vents, and started routing pipework.

marcs
Attached Thumbnails
Click image for larger version

Name:	Lj22693.jpg
Views:	31
Size:	62.3 KB
ID:	919449   Click image for larger version

Name:	Mh20233.jpg
Views:	32
Size:	71.1 KB
ID:	919450   Click image for larger version

Name:	Ot48400.jpg
Views:	29
Size:	78.2 KB
ID:	919451   Click image for larger version

Name:	Zt52764.jpg
Views:	27
Size:	99.2 KB
ID:	919452   Click image for larger version

Name:	Gr92999.jpg
Views:	27
Size:	67.1 KB
ID:	919453  
marc s is offline  
Reply With Quote
Old 04-21-2008, 11:12 AM
  #25
Bob_B
 
Bob_B's Avatar
 
Join Date: Nov 2003
Location: Bluegrass State of Mind
Posts: 3,612
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: 1:4 scale MB339 jet build/re-fit

Marc,

Another fantastic build I see!

Bob
Bob_B is online now  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 11:49 AM.