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Warbirds Replicas P51 Mustang

P51D and P51B Proposed new versions

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Paul Johnson 423/10/2020 12:12:21
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918 forum posts
650 photos

Thanks guys.

Stamina is very poor, but I'm sure it will improve.

At least I've a head start on the build....

RICHARD WILLS23/10/2020 12:43:55
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655 forum posts
97 photos

I use to have urges .....

Paul Johnson 423/10/2020 13:41:52
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918 forum posts
650 photos
Posted by RICHARD WILLS on 23/10/2020 12:43:55:

I use to have urges .....

I have to keep quiet about them ...... or Mrs just gives me more tablets!

Graham R23/10/2020 15:17:48
391 forum posts
28 photos

Hi Paul, great to hear that you are on the way back to health. Keep taking those mojo tablets.

Paul Johnson 424/10/2020 13:09:44
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918 forum posts
650 photos

Well I'm afraid I got another urge, have to be careful now it could become a habit!

One small thing I have come across is the battery box. As I previously noted my one was too short and this should have been corrected on the production models. You will notice a packing piece at the rear of mine so ignore this.

Now I'm not sure if this aspect of the battery box has been changed but if not it's a very simple adjustment.

The battery box lid should slide off and lift, mine I realised has a small lip, whilst helping to secure in place with the fixing magnets makes it a problem if you then have to lift it straight up against the pull of the magnets.

battery bay lip.jpg

Those magnets are on steroids, luckily as previously mentioned I have yet to fix the battery box in place so was easy to slide it out then release the cover by moving it sideways first.

A quick pencil line around the offending lip and it was soon removed.

battery bay lip removed.jpg

Now I'm on a roll and decided to fit the ESC.

After deciding to where to fit it, I like as much weight forward as possible, I chose to fit it just behind the motor on top of the battery box.

esc location.jpg

You can see from the picture I have also created a cut out for the battery connection.

 

Edited By Paul Johnson 4 on 24/10/2020 13:10:20

Paul Johnson 424/10/2020 13:19:36
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918 forum posts
650 photos

Next I needed to secure the ESC and decided to use good old velco for the job.

Before using the self adhesive to secure it to the ply I sealed the ply with PVA glue and whilst that dried made a small cut out in the velcro for the big Resistor on the back of the ESC to make it a better fit.

Remember that the flat plate on the ESC is a heat sink and should not be fixed to a surface but have air flowing over it to assist in cooling.

velcro.jpg

velcro cut to fit esc.jpg

esc top view.jpg

A little hot glue was added just to keep the wires a little more tidy.

esc wires tacked with hot glue.jpg

Now it's time for my Nap.....

Trevor24/10/2020 13:27:55
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522 forum posts
61 photos

Well done Paul - great to see you back on the case.

Trevor

Ron Gray24/10/2020 13:42:03
2452 forum posts
992 photos

Great stuff Paul, the mojo is really kicking in now!

Just noticed that you fitted the motor mount + rather than x any reason why?

Edited By Ron Gray on 24/10/2020 13:45:00

Paul Johnson 424/10/2020 18:56:35
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918 forum posts
650 photos

Hi Ron,

If it's mounted X I found there wasn't enough space to use bolts.

You could use wood screws, just a personal preference.

You can see from the last picture I cut a access slot to fit the nut.

Whatever your preference don't forget to make sure there's nothing sharp that could damage the battery. I put in a small piece of foam rubber.

Paul

Ron Gray24/10/2020 19:26:08
2452 forum posts
992 photos

Thanks Paul, thought there must have been a reason!

alan p24/10/2020 20:12:44
314 forum posts
25 photos

looks like you have hidden those tablets the wife used to give youwink

Gordon McConnell26/10/2020 14:48:06
8 forum posts

Hi All,

Firstly to introduce myself, my name is Gordon McConnell and I am a member of Ayr and District Model Flyers. Like many, I have returned to the building aspect of the hobby after many years, having found time on my hands after retirement from full-time working. I completed a Tim Hooper Citabria Pro last winter and have been looking for a challenging winter project for this year.

Just caught up with this post of the impressive P51 from Warbirds. I contacted Richard and he very kindly put my name on his list.

Paul, your build blog is excellent and I will be keenly following it as you progress. Hope to have one flying over the skies of Ayrshire my next summer!

Regards

Paul Johnson 426/10/2020 15:42:57
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918 forum posts
650 photos

Hi Gordon,

Welcome to the merry band, I discovered the Wills Warbirds effect a few years back and have enjoyed each of the available kits.

I was privileged to get to know Richard and became his guinea pig tester.

I don't think you will find another kit manufacturer that puts so much effort into ensuring you have all you need available to complete the kit.

We even discussed a midnight raid on a wind farm tooled up with hacksaw to solve the balsa shortage..devil

Graham Davies 326/10/2020 16:06:19
151 forum posts
54 photos

Glad you're back on your feet Paul.

One question; how do you test the guinea pigs? Is it a written test, or practical?

Asking for a friend...

Paul Johnson 426/10/2020 16:21:57
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918 forum posts
650 photos

Graham thanks

Guinea pig testing is an art.... I usually find 240V is about the limit.

Those which pass go onto stage 2... propeller balancing.....not many seem to pass that bit...... well lots of bits....

Paul Johnson 426/10/2020 21:39:21
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918 forum posts
650 photos

A few pictures showing the snakes trimmed and the receiver installed, As it is a AS3X I need it close to the C of G.

snakes trimmed.jpg

receiver fitted.jpg

used some scrap ply for the tray/mounting. Mounted using Velcro again priming the ply with a light coat of PVA.

Paul Johnson 427/10/2020 13:48:31
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918 forum posts
650 photos

I am almost at a point of now needing the wing to allow tail plane/rudder alignment.

Now this part of the build was carried out in parallel to the fuselage as part of the bug squashing campaign.

So some of the pictures will show the fuselage in earlier stages of assembly.

When removing the ribs from the sheets just check that they are free to be pushed out, some may have material holding them a little more securely in place. Remove this with a sharp knife/scalpel

rib removal 2.jpg

Wing Parts.

wing parts.jpg

Those feet appear in many a cameo role... or was that camembert?

Martian27/10/2020 13:56:13
2655 forum posts
1270 photos

At least they are on soft carpet and not a cold floor

Paul Johnson 427/10/2020 13:56:48
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918 forum posts
650 photos

To prevent two left or right wings being built you can see I have marked the spars to prevent mistakes.

The first part of assembly stated with the U/C mounting plate which was glued to Ribs 4 and 5.

rib 4 rib 5 glue to uc mounting plate.jpg

I then fitted and glued the lower main spar to this.

wing spar glued to r4 r5.jpg

Next the U/C plate rear support was fitted making sure that this does not interfere with top spar.

uc mount plate support glued.jpg

Paul Johnson 427/10/2020 14:05:25
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918 forum posts
650 photos

As you can see from the preceding photo's I have used an old glass table as a nice flat surface.

I am sure you can persuade the Mrs it's in the interest of science that you can use the dinning room/coffee table.

To this the ribs were glued to the lower spare keeping them square and flat on the tabs to the glass surface.

ribs aligned and glued to lower spar .jpg

The leading edge was fitted along with the aileron rear spars and the top spar glued into place. I used tape to hold it in place.

top spar glued .jpg

 

Edited By Paul Johnson 4 on 27/10/2020 14:05:50

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