Next tests

We then moved into a period of F7-8-9 gales in Jersey which didn’t make me feel inclined to pull the ‘plane out for further engine running

next steps will be to repeat and fine tune the engine monitor .. Check for any leaks as she picks up temperature and rev range

Then, with the aid of a couple of wing walkers, check the brakes and general handling in terms of steering and taxiing …

Once I have about an hour of ground run on the engine … I can start to plan a few evenings covering the sides and getting the reg on … The radio clipped in and a test call to the tower to make sure my ground plane all connected up nicely.

The TRIG transponder and radio need to be ordered soon as well as Jersey don’t really approve on non transponder due to the nature of commercial traffic. Les, the SATCO, has been brilliant but I don’t want to push my boundaries !

April could definitely bring a spring to the air … In more than one sense !!

29th Feb – Second engine run

The second engine run .. Of about 5 mins was a much more controlled and pleasant affair !!

explored a bit more of the range .. Very small movement invoked the most amazing amount of thrust … Boy this hung is going to go ….

I ran her up to about 60% .. Once I had some warmth in ….

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I could then hear the zing of the prop as the sound echoed around of the hangar walls .. She sounded just like a REAL aeroplane … Just absolutely purred …. Back to slow running which was clearly ‘hunting’ .. That is the choke not closing properly .. Part now ordered from Sky Craft to peg this properly

I could then see that the multi engine monitor unit I had indicated that a warning in the Port CHT .. No reading so looks like maybe a bad connection … RPM was varying between -300 and plus +800 … This was located to my incorrect initial setting of the RPM defaults … Spotted I had left the default of 6 pulses per revolution when the Jab only has two nuts that pass the tacho ! Now reset will check on next run

29th Feb – First engine run

The day arrived ! having had an aborted (flat battery) attempt at turning the Jab 2200 over the Monday brought a nice fully charged battery, a tank with some nice fresh Avgas in and a bunch of eager bodies around to help.

SWAB was duly pulled out and the wings opened … Must get those retainers fitted to the top so it can be a single man job again .. Since the chunky spring retainers went in you can’t do it single handed .. But boy are they secure

Chris Winch and I tied two large concrete blocks to the lower tail end and two large chicks were put in the wheels. Extinguisher and hose were put ready and then I climbed in .. Only he third time I have sat in .. Superstitious or something ?!

Brakes on, throttle set all the way back and a small notch open, fuel on, choke on, carb heat on, mags on … CLEAR PROP and press the button …..

Two turns then absolutely burst into life …. So much life though … Realised it was a lot more than tick over so my right hand, which had been resting over the mags, pushed both down and it stopped immediately …

Turns out the Jab throttle seems to operate the ‘other’ way … I haven’t seen anything in the manual but had assumed (yes I know that means an ass out of you and me !) it opened up to full throttle against the (return) spring …. It doesn’t … So tick over was actually FULL throttle. It ran for about 4 seconds before I hit stop

havung investigated with the collective engineers we decided I should push full forward on the throttle and pull back a noth .. Second start .. Perfect .. Ticked over .. A bit rich .. Found the choke cable was catching on the carb flange …

Prop wiring

Wired up prop ahead of planned engine test ..

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Pre torqued up as per Hercules spec … Nice clear instructions they provide with each prop

Ariel – Comant and Icom

Although i intend to put a double Trig set in i am starting off with an Icom unit. The ariel that comes with the Icom should be fine for testing but def not mid channel crossings !

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So i have a top of cabane mounted comant ariel which i have made an under tray for with rivnuts so that i have blind access. Three long countersunk allen headed bolts complete the fitting.

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I sourced two RG58 co ax plugs from RS and these will be fitted to the base today ready for covering the centre top cabane (Olive Green). The Green contrasts to the Cub Yellow wings but carries in the top cowl, upper body colour scheme before it changes to Yellow behind the pilots head.

I intend to curl some slack ariel cable in the top cabane so that i have ‘working’ cable should i need to service the ariel.

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I am now looking for suitable trunking rubber to secure down the back of one of the supports struts so that the ariel cable routes neatly to the cockpit.

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Trailer adjustment

Mike has made some final tweaks to the wing supports. Kevin made some fantastic light alloy dollys and some nice wide carbon fibre under wing supports that mould to the wing shape.

This will prevent any bouncing whilst trailering.

With the engine monitor all pretty much wired up and throttle connected its up to the Channel Island Aero Services to check her out, get Avgas in and test start the engine.

Tail weight sourced and fitted

Tail weight sourced through a UK diving company .. So provides a simple sungle 3Kg block. Made up a clamping plate for both sides, glued and bolted onto the plate and then 4 x rivets to the airframe.

It’s been a long Christmas !

Although it’s been a long family break I have been trying to keep things moving over the Christmas and New Year break !

The big build  to a ski trip was dashed when the high winds meant we couldn’t sail off the island so ended up flying to Malta .. Not renowned for its ski slopes ! But lovely 20′ nonetheless …

it’s been a great chance to catch up with odd days and hours when the work support and trips permitted …

  • Tidying and gluing the underside covering
  • This leaves just two full length sides  – about 3 evenings work
  • Re rigging all upper cables for the tailplane
  • Making a new wing bracing wire as last re rig proved one was just too short
  • Re thread the pitot tubes through the drag spar and into the fuselage
  • Connecting the plumbing for the fuel tank and incorporating a drain plug / valve
  • Completing the wiring of the 2 x CHT and 2 x EGT sensors
  • Adding a splitter pair of wires to allow a secondary CHT gauge in the front cockpit
  • Securing the throttle cable guide
  • Ordering some sheathed cable for the magnetos and headset connectors
  • Complete drilling and fitting of the lower wing tips using small alloy brackets to allow removable option
  • Tweak trailer wing support to accept tailor made carbon fibre supports that span two full ribs cushioning the whole transport
  • Re fitted all 4 ailerons
  • Purchased 4 gate bolts as advised by my good fellow builder Danny to make the return springs on each wing peg
  • Re sized the headrest to be a closer fit to the head bubble
  • Pre tested the icom unit

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Next step .. Onto trailer and up to the airport for first engine test run

Old times ….

Haven’t done this for years !

 

Middle son Will is picking up the old traits and, rather than buy all foam, out of the box, battery in, and fly type models … he has opted to build an RCM&E FW190 plan based aircraft.

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Interesting to get used to reading this sort of plan again and prepping all the ribs and spars etc He has also invested in some Robart retracts … I always dreamt of those but could never afford them … had mechanical set which were a bit clunky ! Flew them in my SuperStar off an old American aerodrome in Suffolk called Alpheton

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Re-assembly – pre engine test run

Spent a few hours pulling various parts that were covered some time ago and can now be re-joined to the mother ship !

The Elevators have been off ever since covering as have the tailplanes and elevators but now I have decided the wings are on to stay (they have been on and off about 3 times to date) then they can all start to go back on board.

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Pays to mark these ..(‘S’ for Starboard) as each was pretty built in situ you do get slight deviations in fitting placements … which effectively makes all placements unique.

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Looks so much better when the tail goes on … will leave the re rigging off for now as that will get in the way of covering the sides. Picture right above … shows a position that will NEVER happen .. differential elevators !  – mid way through re connecting.

These are extremely difficult to re-connect post covering I imagine so I took the opportunity to reconnect now where I can get easy access. Will take the overhead of tricky side covering !

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Nice to get first aileron back on .. These look quite nice now they are covered and sensible gap on the frise 🙂

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