About this Blog

This is about the combination of two interests, Radio Control vehicles and Science Fiction models. This blog documents my science fiction spaceship and radio controlled vehicle projects.
Showing posts with label Imex Jumbo maxx. Show all posts
Showing posts with label Imex Jumbo maxx. Show all posts

Saturday, 15 May 2021

Moon Bug Part 7 completed.

 Note: Google informed me today that they deleted my original "Moon Bug part 7 completed" post as it didn't meet their guidelines, something about malware and viruses. I have no idea what they are talking about and there seems to be no way to ask exactly what was the problem. If there was any malware or a virus it certainly wasn't put there by me. I find it really irritating that without any warning they just delete something that I put a lot of effort into and then don't have a mechanism for any helpful discussion. How am I supposed to prevent this happening again if I have no understanding of why it happened in the first place?

So now I have to re-create the post, luckily I also post on the RPF so I have a record of the original text.

Last time the model was at the primer stage, so the first job was to devise a paint scheme. As is my process these days I took a grey primer photo into photoshop and fiddled about until I came up with something I liked. As the vehicle has a whimsical comic book outline I wanted to do a colorful paint job to go with it. This is what I came up with.

I then decided to design up and make some decals to add to the graphic nature of the finish. These I designed in Inkscape which is a free open source vector graphic editing program. I have always liked the graphic elements that Chriss Foss would apply to his gouache painted spacecraft book covers of the 1970s'. Referring to my Chriss Foss art book I availed myself of some of his genius and some of the decals do bear a very strong resemblance to his work. Here is the decal sheet.


One of the problems with DIY decals is that inkjet printers can't print white so if you want white in your decal you have to use white decal paper. That then means the carrier is white and you have to carefully cut around each decal to remove the extraneous white around the edges. Of course you can use clear decal paper which means you don't have to be as precise when cutting out the decal as the borders will be clear and will not be visible once applied but any white areas on your design will come out clear. If it is a big decal you can paint a white area where you want the white bit to be but for small decals I think it would be too hard to get the white painted areas that accurate.

I printed onto white decal paper and once cutting out the decals and applying them with much setting solution found that little white edges showed up which wasn't exactly what I wanted. I have since found some online tips for using white decal paper, where the edges of the decal should be coloured with a permanent marker to get rid of any white bleed once applied. Too late for me but a good idea for any future project that needs custom decals.

Paint was car paint from touch up spray cans with varying shades mixed up once decanted into airbrush jars and airbrushed on. Weathering was my usual method of a wash of Tamiya flat back diluted in much methylated spirits, wiped off with a metho soaked rag in the direction of the required streaks and drybrushing with white students acrylic. I then also added some oil paint colour modulation and a dirty brown pin wash.

One of the things I tried out on this model was painted panels lined out with a fine permanent marker pen. Models from Terrahawks recently came up for auction with accompanying photos and they had a surface that used a similar technique to very good effect.

My conclusion is that I prefer to have panels that are in the very least scribed into the surface if not actually separate from the underlying surface and glued on individually. I prefer the way light hits an actual edge with both a highlight on one side and a shadow on the other.

One thing I added to the model was a couple of dummy whip aerials on the top blisters at the rear. They are made from bicycle gear cable with a couple of plastic kits parts for a mount and a termination at the top. They should wave about fairly realistically when the vehicle is in motion.

Finally here is the finished model.

 




















Thanks for looking...

More soon...



 



Sunday, 13 September 2020

Moon Bug part 6

 Got some primer on the Moon Bug.












I definitely need stiffer springs and more than likely sway bars on the chassis to hold up this heavy body.

The next step is to paint the figures and install them in the cabin and also come up with a suitable paint scheme.

Thanks for looking.

More soon...

Sunday, 16 August 2020

Moon Bug part 4

I have been building a rear door and finishing up the external detailing on the Moon Bug project as well as starting the interior of the cabin.

Rear Door.


Right side.

Left side.

The picture above shows the louvre arrangement of the roof over the rear door.

I also added a second smaller grey blister to each side. 

These blisters are made from plastic measuring spoons with the handle sawed off. The nub of the handle was then sanded back to the contour matching the oval shape.

Some detailing has been added to the underneath of the hull front where it meets the chassis. I also added a few bits of detail underneath along the sides to fill in some gaps that could be seen through the chassis. I have some small tanks (not shown) made from PVC pipe end caps which will be affixed to the chassis after they are painted.


The cabin interior still needs some control consoles to be made up with some backlit screens and some arm rests for the seats.

The Bruder figures seem happy with their new seats. The padding for the seats is made up from half round ABS strips.

 




Through the door in the middle and down two steps is a back wall that will look like a transverse corridor to the interior of the vehicle. The back wall has been detailed with a recessed section. There is some 12 volt strip lighting in this corridor which hopefully will be brighter than the cabin interior which I plan to light just from the as yet unmade console screens.

I have also made some detailed inserts for the cockpit sides with kit parts mostly from the Tamiya 88mm Flak kit.. 

I am a bit concerned that perhaps the detail is a little too fine scaled for the vehicle and looks out of place compared to the rather chunky detailing elsewhere.

I will reserve judgement for now and wait till some primer goes on to see if some alternative inserts need making.

This model is getting close to completion of the build phase with a bit of piping to do, the cabin sides to think about and the consoles to sort out.

 

 Thanks for looking.

More soon...


Tuesday, 21 July 2020

Moon Bug part 2

I have been progressing on with the glass house cabin.
It has been fiddly to get the side mullions straight as they have to be curved to fit the curved bowl and end up looking straight.
The method to achieve this is to place some masking tape on the curved surface and then draw a line outlining the shape you want. When you peel of the tape and place it on some flat sheet you will hopefully have all the curvature in the right place so that it becomes straight again once cut out and glued back onto the curved surface.
The 2mm thick styrene has to be massaged into the required curve by hand first before cementing into position.
The other thing is to try and not get any cement onto the clear glass areas and fog them up. If any small bits of solvent do mar the clear areas you can usually polish it out with a plastic polishing compound.




 
All the power supply wiring has been installed and tested. I have a ubec providing 12 volts from the 14.4 volts delivered from two 7.2 volt Lipo batteries in series which power the vehicle.  12 volts is being provided to the cabin lighting and the two 10mm led tail lights which each have the required resistor to work with 12 volts. The head lights are two cheap LED torches which are supposed to run on 4.5 volts from three 1.5 volt dry cells. I found a small cheap DC to DC converter board which has an adjustable output voltage so I am down converting the 12 volt supply and providing 4 volts to run the headlights. I found the torches started to draw a lot more current at 4.5 volts so I dropped it to 4 volts which was about half the current and more or less the same brightness. Getting the torches to work took some fiddling about until I found the DC to DC down converter board and I burnt out a couple of torches in my attempts. Luckily they only cost a couple of dollars.

The is a tiny board stuck to the top of the UBEC in the picture below is a Pololu rc switch with small low side mosfet. It takes a signal from the third channel on the transmitter and switches the lighting on and off remotely. I believe you can find a similar thing on HobbyKing.com already wired up.


 
10mm Led tail Lights


Converter board providing 4 volts to the headlights.
 


I am using twin old school brushed motors in this vehicle which are more than capable of pushing this heavy beast around at a decent if not frightening speed given that this is a heavy custom made one off body shell. The electronic speed controller is a Hobbywing Quicrun WP 880 for dual brushed motors. This setup is also I might add considerably cheaper than a brushless system.

Thanks for looking.

More soon...

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