E.N.T.

My Feedback: (1)

Thank you very much, Mark.
This is the address: Hector M. Armaiz M.D.
PO Box 361756
San Juan, Puerto Rico, 00936-1756

I'll appreciate it.

Hector

marc s

Hector, they are on their way, will be posted tomorrow - I've posted a pic on the catches thread

Few small updates on the build. The original grill supplied for the fuselage hole was trimmed very tight and did not leave much meat to secure, so sent this along with a template for the smaller grill to a friend and he cnc'd twi new grilles with a solid 10mm border around the outside to cater for fixing - really nice and so much easier to fix - cheers Rich..

Made another equipment panel as naturally I had forgotten a load of things which needed to be on it! So the new panel includes charging points for RX packs....

marcs

marc s

It's been a while since I last posted, its not that nothings been going on on the build, just fiddly things and loads of cnc machining of items required for the build ongoing. I have not been able to instal the front bulkhead and turbine former yet as the turbine only turned up on Friday, but now waiting for a missing mounting bracket, so been working on the following..

- had a friend machine the new Behotec nose wheel leg, as the retract units, now fitted with larger cylinders fouled on the gear leg preventing full closure, so the leg was spun in a lathe and had the top section reduced in diameter. now it closes!
- Made two aluminium mounting brackets for the instrument panel, these were shaped to follow the contour of the fuselage, and once right were tacked in with cyano,and finally Aeropoxied into place
- Added a length of carbon tube to the lower edge of the instrument panel opening to add a little strength here and prevent the fuselage skin from flexing, eventually the hinges will mount just above this
- Made another former to go up into the fuselage to add strength to the top of the hatch opening, this I hope will also double as a centre location point for the hatch retaining system
- Now that the main gear are reversed, and fit the wings I had a couple of wheel 'trims' made to fit to the rim as per the full size, the rims already had 5 x M2 holes drilled into them so these were used to fix the 'trims' in place
- A revised (no3) instrument panel was cnc'd by a friend as the second unit I made was too short!
- Fitted the second fuselage grill
- Completed the second wing flap fitting
- Cut out the nose gear door

So thats about where we are at now, loads in the post due to land soon so progress will pick up speed a little

marc

marc s

few more..

marc s

Bits arriving at the door most of this week, so now things are slowly starting to piece together.
Modified the original mounting plate for the multifunction valve as I wanted this to remain flush on the panel, restricted by other fittings I made a new FR4 plate to fit the unit using aluminium stand-offs. The hatch has the retaining lip fitted now so the door will sit and remain flush when secured, test fitted the equipment panel again with the multivalve fitted and the SMC air gauges fitted flush, all seems to fit OK.

Turbine exhausts arrived today so these, once the formers are secured in place will be trimmed and holes in the front nose section made to suit.

Still struggling with the nose door hinges, most of the offset types require leaving a fairly large gap to allow the door to clear the fuselage when opening, the moulding in this part of the fuselage area is very thick and I'm not happy yet with any of the options to had, unfortunately because the gear box assembly is attached to the main front former I cannot fit this yet as there is little room to do this job if this is fitted without the hinges being done[:@] If any of you have a neat solution for this then please let me know - my direction is towards a piano type hinge which I have yet to find!

marc

marc s

few more

marc s

turbine

rcjets_63

My Feedback: (4)

Marc, here's a link to a small piano hinge. The 3/8" wide one is too narrow for mounting screws but the 1/2" wide one is perfect.

[link=http://www.nelsonhobby.com/piano.html]http://www.nelsonhobby.com/piano.html[/link]

E.N.T.

My Feedback: (1)

Mark, Hi! Hector once again. I was wondering, is that carbon fiber?
Are you going to use 2.4 ? What about possible interference? Just
questioning myself.


Hector

marc s

Hector, yes it is and a fair amount of it is used although mainly in the nose section aft to the leading edge of the wing root. Ali I think is going 2.4 with spectrum so there will be 3 or so satelite receivers scattered around - should be fine.

marcs

E.N.T.

My Feedback: (1)

By the way, Mark, I just recieved today the latches, Thank you very much.
I'll try them in the plane, and will recall who they work.


Hector

marc s

Great, glad they arrived safe, and hope they help.

marcs

marc s

At last hinges arrived that I think will be spot on for this project, having sourced a few different hinges over the last week or so nothing has quite looked up to the job, these are nice and small (two sizes) and are a decent thickness, and have a nice plate area to drill to fix or glue.
Using normal offset type hinges just would not work with the doors etc, could not get enough throw to open the doors 90 degrees so hence the search

I have installed the side hatch retaining system, two spring plunger type catches, hooked up via two ball clevises to thin Sullivan control rods, these will terminate at a small bent wire exiting on the training edge of the wing close to the fuselage, I will bend the wire so that when docked it follows the wing shape so to the roaming eye nothing should be visible - well thats the plan anyway.

Started hinging the hatch door with the smaller hinges, and will use the larger ones for the nose gear doors.

marcs

marc s

Added the hinges (larger type) to the gear doors, first tacked on with some cyano and then made up a thin ply plate, with small recesses milled out to allow the hinge plate to sit underneath and Aeropoxied this in place, the ply adds a little strength to the long length of the doors.
Applied a layer of glass cloth to the nose tunnel assembly as this structure will support a number of heavy items (batteries etc) and wanted to make sure it was up to the job!
As the gear door assembly is not as per the instructions next task was to try to work out how to activate the doors, air or servo and from where! The tunnel assembly finishes only a few millimeters inside the door cut-outs so making the job of adding an air cylinder or servo a little bit of a brain tease. Inside the gear bay there is a reasonable amount of room, so toying now with keeping the air cylinders inside this area, experimenting with a bracket with the two cylinders attached which will sit either side of the gear leg (at its thinnest x-section) - I need to test instal to see if the geometry works so thats a job for later

marcs

schroedm

My Feedback: (1)

Marc,

I see Ali has sent you the perfect pilot for this model in the 3rd pic

Mark

marc s

My daughter was gutted when I sliced the head off her prized Cindy doll shame she did'nt fit [X(]

marcs

marc s

Finaly managed to line up the turbine and formers and get these tacked in, gear doors work nice, just need to check with the nose wheel in place that everything is free from snagging - will flip it over tomorrow when the Aeropoxy is dry to test.

marcs

marc s

Latest.

Tidied up the nose section and gave it a coat of paint, added four hard blocks of beech to the sides of the fuselage where the hatch will secure. The original plans show a fairly complex system of moving parts to remove the hatch, but as all the switches and fuel feeds, fills are under the side hatch access to this area will only be required for periodic servicing so have opted to secure with M3 bolts into captive nuts mouted on tabs fitted to the hatch - 4 should do with two locating pins right up front.

Made a panel to fill the area behind the turbine mounting plate, this will have solenoid, fuel pump, battery balancer sockets and possibly turbine ECU mounted to it on the reverse so out of sight but accessible on removal of 4 servo screws (thats the plan anyway!)

Side hatch is now sprung and fitted a closure system using two sprung pin closures which locate into two holes in an aluminium plate fixed to the hatches lower edge.

Fitted the main battery try and air tank securing plates, and installed the nose gear.

marc

marc s

few more..

Rich_C

Looking good Marc,

Rich.

marc s

While Rich C is busy cutting out some wing/fuselage panels to hook up air and electrics I decided to have a go at the landing gear main doors. On the kit the doors are supplied per cut out of 1mm glass board and fit the recess in the wing really well, only problem is the hinging method. The doors finish straight at the point of hinging but the retract recess extends beyond this, the result is a hole where the gear door does not fill the retract recess in the wing. In flight you are unlikely to see it but for me it was another little project to fix..

First job was to cut out a clear template, did this on the last build and it allows you to see exactly where the gear leg to door linkage needs to go, so you don't spend hours trying to 'guess' where the hole should be in the door, and worst drilling holes which end up in the wrong place[] Once the new clear gear door was cut, including an extra piece to cover the hole, I fitted a ball clevis to the leg (just happened to be a suitable threaded hole already!) and experimented with a few different rod lengths until i was happy with the action and gap etc. I will now get two new gear doors cut to include the added section and hinge the unit using the same hinges as on the equipment hatch door.

A few pics of the now finished turbine hatch and fittings and the gear door experiment....

marcs

marc s

gear doors...

marc s

Fitting air brake pipe to gear legs has never been a sinch, with nice round legs you can use those natty clips which look good and work fine, this set are a type of hexagonal shape so no chance using normal clips here, and I'm not a fan of cable ties. So this turned into a small evenings feat of soldering and pipe bending......
Copper or brass tube, to which I soldered some brass air nipples taken from a couple of old Clippard valves, then with some bending ended up with two fittings that kind of looked right, then came the problem of fixing[] glue wasn't an option as I wanted this removable for servicing etc so decided to drill and tap a couple of M2 holes - a task which was easier than I had hoped for. The resulting system keeps the feed tube out of the way and the base of the leg, a length of tube over the knuckle allows flex and the final hook up looks neat enough. Just need to paint and replace cap heads with some button head M2's for final look...

marc

marc s

sorry pics.... did not load first time

digitech

My Feedback: (10)

Mark not sure if you did
but use some Loctite 648 to "glue" those 1/2 to 8mm adaptors in.
also aa drop on the lower section so it wont move..