1:8 McLaren Honda MP4/4

Post here information about your own engineering projects, including but not limited to building your own car or designing a virtual car through CAD.
User avatar
strad
268
Joined: Sat Jan 02, 2010 12:57 am

Re: 1:8 McLaren Honda MP4/4

Post

Great work on those tie wraps Alex.
To achieve anything, you must be prepared to dabble on the boundary of disaster.”
Sir Stirling Moss

ajdavison2
ajdavison2
28
Joined: Wed Dec 08, 2010 11:41 am

Re: 1:8 McLaren Honda MP4/4

Post

Hi everyone, back again with another update. Apologies for the gap in between them, it's been absolutely hectic lately. This time I'll be covering stage 56: fitting the front brake ducts and radiator housings.

Parts supplied with this stage were: Left and right wastegate cooling pipe fronts (top left), wastegate cooling pipe x 2 (left, 2nd down), battery cable (left, 3rd down), left and right intercooler to engine pipes (bottom left), left and right injectors (top right) & left and right aerials (bottom right).
Image

Parts needed from previous stages were:
- Left and right front brake ducts (Stages 8 and 11)
- Left and right radiator housings (Stages 32 and 51)
- Throttle cable bracket (Stage 49)
- Underbody front (Stage 49)
- Monocoque assembly (Stage 55)

First up the brake ducts were pushed into the holes on the left and right front brake assembly respectively (they were dry fitted FYI). This was trickier than it sounds as it was hard to get the alignment right, and hold onto the model without braking anything, managed to get it with a bit of jiggling, and bracing against the metal axle which is the strongest point.
Front right:
Image
Image
Image

Front left:
Image

Next up, 56.2: fitting the throttle cable bracket. Easy enough, this was just glued to the slot on the monocoque near the engine mounting point.
Before:
Image

After:
Image

next, 56.3: fitting the radiator housings to the monocoque.
For this stage, the 2 screws holding the monocoque back plate were removed. These apparently won't be replaced, so it's a mystery to me why they were even installed in the first place. It's actually my biggest bug bear with this project, a lot of the steps are unnecessary and feel like they're just in to pad the assembly length. The screws were also removed from the lower plate on the underside of the monocoque. I'm unsure if this will be replaced or not.

This now partially assembled monocoque was placed on the underbody front to test fit the radiator housing, before the paint being removed on the monocoque and the radiator housings being glued to it. My hunch is that the monocoque will be screwed directly to the underbody front (and middle) in place of the lower plate.
Image
Image
Image
Image
Image
Image
Image
Image

Now, full disclosure there is a mistake on this bit. Basically the right radiator housing is about 2mm higher than the left one. It doesn't present a problem when sitting on the underbody section, but may or may not present a problem when the bodywork is attached. If needs be, i'll just use a solvent remover and reattach the radiator housing into a more suitable position.

And that's it for this week folks. Next time is a tiny update, so I'll aim to get that out this week sometime so I can get back on track with the next issue. Thanks for reading.

Alex

ajdavison2
ajdavison2
28
Joined: Wed Dec 08, 2010 11:41 am

Re: 1:8 McLaren Honda MP4/4

Post

Hi everyone, back again with the final update for issue 16. This time I'll be covering stage 57: assembling the engine 7.

Parts supplied with this stage were: Inside tail pipes x 2 (top left), outside tail pipes x 2 (top right), sprue parts: pressure regulator bottom (1), header tank hose (2), water inlet pipe (3), check valve (4), fuel pump pipe (5), 3 way joint (6), right throttle sensor (7), left throttle sensor (8), oil filter joints x 2 (9), left fuel hoses (10), right fuel hoses (11), right fuel pipe (12), left fuel pipe (13).
Image

Parts needed from previous stages were:
- Connectors (on sprue, Stage 51)
- Engine block assembly (Stage 54)
- Left and right injectors (Stage 56)

Firstly, 57.1: attaching the injectors to the connectors. The connectors were cut from the sprue.
Image

And glued to the end of the injectors, care was taken to orientate them correctly.
Image

Next, 57.2: attaching the injectors to the engine. The injectors were simply glued to the engine block assembly, this was quite fiddly as they are very delicate, got them in with tweezers. Care was taken to get the correct injector on the correct side, as they have a left and right and a front and back.
Image
Image
Image
Image
Image

Next, 57.3: Joining the fuel pipes, 3-way joint and pressure regulator bottom. The respective parts were removed from the sprue. Care was taken not to trim the protrusions that help fit the parts.
Image

The fuel pipes were then glued to the 3 way joint. Care was taken to get them as straight as possible.
Image
Image
Image
Image

Finally the pressure regulator bottom was glued to the other ends of the fuel pipes.
Image
Image

And that's it for this week. Not sure when I'll be back with the next update, but will try and keep them regular.

Cheers,

Alex

User avatar
strad
268
Joined: Sat Jan 02, 2010 12:57 am

Re: 1:8 McLaren Honda MP4/4

Post

this was quite fiddly
I have the distinct feeling that fiddly doesn't begin to describe lots of this project. I really don't think I would have the patience.
Nice work as usual.
To achieve anything, you must be prepared to dabble on the boundary of disaster.”
Sir Stirling Moss

ajdavison2
ajdavison2
28
Joined: Wed Dec 08, 2010 11:41 am

Re: 1:8 McLaren Honda MP4/4

Post

Hi everyone, back with another small update. This week we'll be covering issue stage 58, assembly of the left turbocharger.

Parts supplied with this stage were: Right turbocharger part 4 - RTP4 (1), left turbocharger part 6 - LTP6 (2), RTP6 (3), LTP4 (4), RTP1 (5), LTP1 (6), LTP2 (7), LTP3 (8), LTP5 (9).
Image

Parts needed from previous stages were:
- Left Fuel hoses x 3, right fuel pipes x 3, Engine block assembly, sprue of parts, fuel pipe assembly & injectors (Stage 57)

Firstly 58.1, LTP2 & LTP3 were glued together after removing the paint. The paint was also removed in the central bit of LTP3.
Image
Image
Image

Next up LTP1 was glued to the centre of LTP2.
Before:
Image

After:
Image

I got LTP1 into the small gap with some tweezers and pushed it in with the back of the knife.

Finally LTP4 was glued onto LTP3.
Before:
Image

After:
Image
Image

Next, 58.2, attaching the fuel hoses. First job was to carefully remove them from the sprue and trim the flash. This was impossible to do without also taking a little bit of the silver paint with it. I haven't decided if I'll touch this up or not. Shown below on my cutting mat to give an idea of scale.
Image

This was then glued to the side of the fuel pipe sub assembly. Care was taken to ensure to correct orientation, which was perpendicular from above and angled up from the side. I've attached a photo of the magazine instructions for reference, I think I got it pretty spot on as it happens.
Image
Image
Image

And the rest of that side:
Image
Image

And finally the other side:
Image

Next, the fuel pipe sub assembly was attached to the engine block assembly. This was by and large one of the most fiddly things I've done on the model so far. It involved hooking the fuel hoses underneath the injectors, which itself involved lifting the injectors away from the engine block assembly and trying to manoeuvre the hoses under them without damaging any of the components. Photo below of the hoses hooked under, but not attached.
Image
Image


And attached, due to the elastic nature of the materials, and the position they were in I had to do one at a time, hold it in place until the glue had fully dried so that it didn't pop out when I done the next one, then do the 2nd one whilst holding the first one in (even when the glue was dry) and finally do the third one whilst still holding the first 2. Quite tricky as it turns out:
Image
Image
Image
Image

And that's it for this week. Next time I'll be continuing assembling the turbochargers and waste gates. Thanks for reading.

Alex

ajdavison2
ajdavison2
28
Joined: Wed Dec 08, 2010 11:41 am

Re: 1:8 McLaren Honda MP4/4

Post

Hi everyone, back again with another update, dead short one this week though. This week I'll be covering stage 59, assembly of the right turbo charger.

Parts supplied with this stage were: Right exhaust base (1), left exhaust base (2), right turbocharger part 2 (3), RTP3, (4), RTP5 (5).
Image

Parts needed from previous stages were:
- Sprue of fuel injector parts (Stage 57)
- Sprue of turbocharger parts & engine block assembly (Stage 58)

So firstly, 59.1, the right turbo charger was assembled in the same way as the left one. (not pictured as there's noting new to show)

Next, 59.2, attaching the fuel pump and header tank hose. Firstly the fuel pump was removed from the sprue and glued into place on the engine block. Not really much to show.

Before:
Image

After:
Image
Image
Image

And next the header tank hose was glued onto the engine block assembly.
Image

And that's it for this week, thanks for reading. I'm in the middle of moving houses so I'm not sure when the next update will be, hopefully get the last one of this issue out next weekend.

Cheers,

Alex

ajdavison2
ajdavison2
28
Joined: Wed Dec 08, 2010 11:41 am

Re: 1:8 McLaren Honda MP4/4

Post

Hi everyone, back again with the last part of issue 17. This week I'll be covering stage 60, assembling the wastegates.

Parts supplied with this stage were: left and right wastegate rear cooling pipes (1 & 4), left wastegate front (2), right wastegate front (3), Turbo charger left and right parts respectively (5 & 8), Wastegate right (6) & wastegate left (7).
Image

Parts needed from previous stages were:
- Header tank (Stage 53)
- Plenum chamber (Stage 54)
- Oil/water heat exchanger (Stage 55)
- Sprue of plastic parts (Stage 57)
- Engine block assembly (Stage 59)

Firstly, 60.1: assembling the left and right wastegates. First up, the left wastegate rear, one of the rear cooling pipes and the left wastegate front. The paint was scraped away from the relevant surfaces, and the waste gate front and rear were glued together with the cooling pipe in the middle being left free to rotate. It was too fiddly to get intermittent photos.
Image
Image

And repeated for the right, the little stub on the right waste gate (confusingly pictured on the left, oops lol) has been left on just so I can distinguish them.
Image

Next, 60.2: attaching the oil/water heat exchanger to the engine block. This was simply glued into place.
Before:
Image

After:
Image
Image
Image
Image

Next, 60.3: fitting the check valve and water inlet pump pipe. These were first removed from the sprue.
Image

The check valve was then glued onto the header tank. Care was taken to get it as perpendicular to the header tank as possible.
Image
Image

Next, the water inlet pump pipe was glued to the header tank. This had to be done in a specific orientation which I managed quite well, see the reference photo below.
Image
Image

Finally, 60.4: fitting the throttle body sensors and oil filter joints to the plenum chamber and engine block.
The left and right throttle sensors and oil filter joints were cut from the sprue, and the first throttle body was glued to the plenum chamber, this was reasonably fiddly but no more so than some of the other small parts so far. Care was taken to ensure the correct side throttle sensor was glued to the correct side of the plenum chamber.
Image
Image

And repeated for the other side.
Image

Next the oil filter joints were glued to the engine block, these were very small and didn't really fit on the pins very well.
Before:
Image

After:
Image
Image

And the other side:
Image
Image
Image

And that's it for this week. I've got this months issue already assembled so will try and post that some evening this week. I know up to now it's seemed like it's all been pretty smooth sailing, bit of gluing here, bit of paint scraping there but ohh boy does it all go t*ts up in this months issue. Like jesus christ get ready for the sh*t show ladies and gents :lol: . As usual if there's anything else you want to see in more detail just let me know.

Thanks for reading,

Alex

User avatar
strad
268
Joined: Sat Jan 02, 2010 12:57 am

Re: 1:8 McLaren Honda MP4/4

Post

All the hoses and ancillary parts seem to be some of the trickiest work yet and you seem to have nailed it.
Great work Alex.
To achieve anything, you must be prepared to dabble on the boundary of disaster.”
Sir Stirling Moss

ajdavison2
ajdavison2
28
Joined: Wed Dec 08, 2010 11:41 am

Re: 1:8 McLaren Honda MP4/4

Post

Hi everyone, back again with another update. These next few updates will be covering issue 18, stages 61-64.

There's a lot of f*ck ups to write about in this one, so I'll be splitting it into several parts. So firstly, stage 61, fitting the engine block assembly to the monocoque assembly. Now as mentioned in my previous post this is also where the sh*t show begins, so strap yourself in and get ready for about 10 minutes worth of reading about 4 hours worth of solid rage filled hate. :lol: :lol:

Parts supplied with this stage were the left exhaust pipe front (1), left exhaust pipe inside rear (2) & left exhaust pipe outside rear (3).
Image

Parts needed from previous stages were:
- Nose box assembly (stage 1)
- Left engine mounting plate (stage 53)
- Right engine mounting plate (stage 55)
- Monocoque assembly, left and right intercooler to engine pipes (Stage 56)
- Engine block assembly, plenum chamber & header tank (Stage 60)

Firstly, 60.1, attaching the header tank to the engine block. This was simply glued on, trickiest bit was that I had to gently pry away the header tank hose, couldn't get a photo as it needed 2 hands but it involved bending it back with some tweezers gently enough so that it didn't snap, but not so gently that I couldn't get it connected to the bit of the header tank.
Image
Image
Image
Image

Next up, but still part of 60.1 was the attaching of the plenum chamber to the engine block. This was again glued into place, and didn't really present any problems, with the plenum anyway. :roll: You'll notice that in the photos below, the oil filter joint on the bottom of the engine block (see previous update) is missing. I'll get to why this was such a massive pain soon, no idea when it came off (other than between gluing the header tank on and now obviously) or how, but I didn't actually realise it had been knocked off until a later stage and ended up missing it as it's such a tiny part. Only realised when I came to review these photos that this was when it happened. #-o Care was taken to make sure the injection unit was glued to the plenum chamber. I held it in place with tweezers while the glue dried, see the last photo below.
Image
Image
Image
Image
Image

Next, 61.2, attaching the nose box to the monocoque. This was pretty straight forward, was just screwed to the monocoque via the brackets placed in an earlier stage. Only tricky bit of this was that the screws were a little bit reluctant to line up with the holes in the brackets, perhaps they weren't completely perpendicular or something, but either way it turned out fine. This is one of the parts of the model that is removable at any given stage, although I probably won't bother as I like the complete look. Be a shame not to see the details of the brake calipers etc but there's lots of details that I won't be able to see on the model, still nice to know they're there. Nice to have the option I suppose.
Pre-attachment:
Image

Post attachment:
Image
Image
Image
Image
Image

And that'll do for this week, I'll be continuing with stage 61 next time I get on, probably some time next week as my entire weekend is being taken up with moving house and the small matter of the start of the season. :mrgreen:

Thanks for reading ladies and gents. Tune in next time for more of my awful ham fisted clumsiness.

Alex