Roden 1/32 Cessna O-2 `Jade 07'. primed

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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby pacificmustang » Mon Jan 22, 2018 8:24 am

looking forward to reading further updates Eric, and watching it come together
If it helps you, here are some pics I took at The USAF Museum whilst there with Calum last year.
[url=https://flic.kr/p/GigApD]Image
[url=https://flic.kr/p/21c4nzj]Image
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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby ericg » Mon Jan 22, 2018 1:15 pm

Thanks Bruce. Any chance you could flick me high res copies of those? Will come in handy for some rescribing that will need to be done to the underside.

David sent me these photos and text.

This is the aerial view of Vung Tau airfield. This was a support base with a shortish runaway (no jets). You can see Caribous, Chinooks, Cobras, OV-10 (a visitor), Beavers, Otters and the tiny O-1s and O-2s. We also had the occasional OV-1 Mohawk. This runway is closed and became a taxiway. A new runway was build parallel but out of the left of the photo. The Aussie camp is to the right amongst the trees - and the township of Vung Tau (a French resort town) is by the coast between the hills. You can also see the radar dishes at the top of the hill to the right.

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This the Aussie Base at Nui Dat and Luscombe Field (the airstrip).We were based overnight at Vung Tau but deployed daily to Nui Dat for briefings and operational sorties.

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The roof of the cabin will be fairly visible on the completed mode and I wanted to hide it as well as make the area stronger to minimise the flex mentioned earlier.

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I cut a section of plastic card to represent the roof lining.

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Measured and marked some points at 2mm increments,

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Connect the dots

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I then scribed each line

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Fitted. The flex is much reduced and the roof moulding lines etc are now hidden. As this is a fairly thick piece of plastic card, I will do some contouring later on, as well as adding some side fillets that will extend down the walls of the cabin.

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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby pacificmustang » Tue Jan 23, 2018 7:30 am

On the Bench
Cyber-Wings 1/32 Me109-E3




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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby ericg » Tue Jan 23, 2018 11:08 am

Thanks Bruce

Another picture from David. Hope you guys are enjoying these!It shows some excellent detail, not only of the aircraft but the Ground support equipment that was used.

David wrote:

This shows the O-2 taxying in at Vung Tau. The front engine was shutdown after landing to avoid stone damage and to reduce the risk of personnel injuries. The whiteboard on the side of the fuselage showed the weapons load, the right window is open for ventilation and you can see the clear vision panels on the lower fuselage. You can see that the undercarriage doors retracted after the gear was extended. The hangar behind is a RAAF maintenance hangar. I can’t remember if it was 9 Squadron (Iroquois) or 38 Squadron (Caribou) - or both.

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He also sent me a scan of the certificate he received once he was checked out on the O-2. once again, another priceless artifact.

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Some modelling.

The main undercarriage legs look a bit over thick and I don't think that they will be up to the task of supporting the model by themselves. A solution was needed and I will detail this fairly easy method so that others can see how easy it is.

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I really wanted to get some music wire into the part, but how? this will make it stronger to support the weight, resist breaking, and also allow me to make the part thinner.

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The part has a conveniently located seam line on both inner and outer faces.

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Using the raised mould line as a guide, I carefully free handed a scribed line using my trusty Trumpeter sriber making it deeper on each pass.

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Using the RB scriber I then widened the groove

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Using the back end of a drill bit slightly larger than the diameter of the music wire I then widened and deepened the groove to allow for fitment of the wire, approximately halfway into the thickness of the part.

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The wire then sits neatly inside the groove.

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Fill the remaining groove with a superglue/talc powder mix

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The almost finished part. Just need to cut off the tips of the protruding wire and you would never know it had been modified.

Not quite noticeable is how much thinner I have made it.

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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby ericg » Wed Jan 24, 2018 10:55 pm

David has maintained a history of flying aircraft after the RAAF, including a museum owned O-2. It has been a while since he has flown but these are photos taken in 2003 of him flying one.

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This one hints at the portrait photo taken 34 years earlier.

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A couple of different views of the flightline. The first photo is definately 972. At first I thought both photos were of the same aircraft but from different angles but the different position of the nose roos prove that wrong. Useful details that I have spotted are : roos on both the tail and nose on 972 (although snoopy seems to be missing on the back of the nose roo), White blade antenna on the roof, solid hubcaps (not present in the kit). Once again, this machine has the modified left pilots window, not buildable without modification of the kit.

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Some modelling.

I enter most of my models in shows around the country and sometimes see people from the crowd(mostly kids)reaching over the tables and touching some of the kits. On two occasions I have seen someone try to spin the prop of one of my models, even with big `Dont touch'signs and supervising adult right next to them!

For this reason, I will try and beef up the prop shaft, just for peace of mind. It also allows for easy removal for transport etc. First, I driled a hole right through the crankcase.

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I then found a length of aluminium tube (outer) to fit the crankcase and fitted an inner tube to the prop hub. Notice the rather puny piece that Roden gives you to do the same job

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Fitted. Much stronger and safer.

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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby ericg » Thu Jan 25, 2018 11:00 pm

Thanks alot guys.

David sent me an interesting Youtube clip today of an O-2 display. He mentioned that the smoke was standard fit and was used if the fighters had trouble seeing them.

https://www.youtube.com/watch?v=v0iazjIb-3c&t=46s

Another great period photo. David apologizes for the focus!

O-1s and C180s in the ‘open’ maintenance hangar at Bien Hoa. Mid 1969.

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Some modelling. A small update today as most of my focus was on the Aviatic Balilla.

I replaced the kit push rods with brass rod. Much easier to trim the rod than to clean up the kit plastic parts. Possibly only visible by an IPMS judge with a torch, but thought I would do it anyway,

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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby ericg » Fri Feb 02, 2018 9:37 pm

A slight change of plans with the model. I really liked the look of the modified pilots window and sought Davids advice regarding doing an O-2 that he flew that had the larger window. The tail number of the one that he is standing next to in his portrait photo was 68-10999, in which he flew 20 missions and can be seen in a few entries in his logbook page as posted earlier. This was also the aircraft that features in the black and white video that shows David in action, also posted earlier.

David recounted to me a particularly interesting sortie that he flew in this aircraft, on 03 November 1969. Here is his story.

`The story of the electrics failure is interesting.

The O-2 had two alternators (on on each engine) and it was not unusual for them to be slightly out of phase. In this case we could have either on-line but not both together. It was usually a temporary problem.

On the day of the night strike I had flown my boss, Colonel Hobbs USAF, from Nui Dat to Vung Tau in that same aircraft and I was able to bring both alternators on line.

The aircraft was serviceable and prepared for a night air strike under a flareship. At night we always flew with two pilots - one to control the strike and the other to monitor the flight instruments. Phuoc Tuy province was as black as the proverbial cow’s guts.

I was tasked to fly with Capt. Chis Neale (featured in one of the other pics). We started engines and had some problems with the alternators. Normally, I would have cancelled or changed to another aircraft but we were then told that there were Aussie troops in contact (TIC). 'Troops in Contact' meant that they were engaged with the enemy and we were expected to respond ASAP. I decided to take the risk and I expected that if one alternator failed, I could bring the other on line.

It was a windy night with unpredictable weather. We took off and headed on the direction of Nui Dat. It was as black as always. Then about 20 minutes into the flight, we were called to say that the troops were no longer in contact. Then the electrics failed totally. Neither alternator would come online. The O-2 was an electric aeroplane. The lights, radios, many instrument and navigation aids and flaps were electrically driven. I asked Chris to light his torch and shine it on my airspeed indicator. I had some residual energy in the attitude indicator before it wound down. I turned towards Vung Tau. I could just make out some lights of the village as I headed home. This was my only horizon.

We joined the circuit at Vung Tau and the runway lights were on. I couldn’t talk to air traffic control and no-one knew we were there. As I lined up on final, (for a flapless landing, with no landing lights, in a 20 knot crosswind), an OV-1 Mohawk entered the runway in front of us.

I had to go around. That overshoot, climb, turn onto downwind and base to final was the most stressful period of my flying career. Chris was a new pilot but an experienced navigator (on RB-57Fs above 80,000 feet!). He bravely helped with the lookout and shining the torch.

The landing was okay and we rolled through. After touchdown, he patted my leg furiously. Then we taxied slowly, carefully and ignominiously to our flight line and shut down. No-one knew we were coming and it was quite a surprise to the ground crew.

I had to submit an incident report and the safety officer at Bien Hoa called me and apologised. He said that he could’t decide whether to chastise me for flying an unserviceable aircraft or give me a citation for great airmanship. Nothing more was ever said!'


The problem (and solution). Now, those that follow my builds know that I like to get stuck into some pretty big modifications that could easily trash the kit. I was hoping to keep this one more or less lightly tweaked, but after seeing a few more pics of the window I thought I would give it a go and hopefully add to my skill set at the same time.

Here is the unmodified window opening. Notice that I have drawn a pencil line where the wing meets the fuselage.

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I sketched where I wanted to cut to get a feel for how it would look and see if it was going to be feasible to perform the modification.

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I took some measurements of the opening and drew a mask in Silhouette Studio.

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This allowed me to start to work out how to get the new opening as neat as possible. The mask as above was placed over the kit opening to check for correct sizing of the bottom and side edges.

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This then allowed me to modify the original shape. By double clicking on the original shape, it is very easy to manipulate it into a different shape by adding points and dragging them around.

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The final mask over the opening.

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I used a sharpie texta to mark out where the new opening would be.

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No turning back now!

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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby ericg » Fri Feb 02, 2018 9:47 pm

Now that the opening had been modified, I needed to work out how I was going to make up a new clear part to fit it. I am yet to work out exactly how I will do it, but I have started the process.

I carved a block of balsa to fit the new opening. The majority of the window is flat, so it wont be too much of a problem. It is the compound curve of the upper surface that will be. This will allow me to hopefully plunge mould a new window. Failing that, I will buy a vac form machine. I selected the end grain to carve, and have wicked thin superglue over the surface, filling the grain and allowing me to sand and polish it to a very smooth and hard surface.

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Very rough and very dodgy, but it should work.

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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby DesTROYer » Sat Feb 03, 2018 10:05 pm

Amazing.
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Re: Roden 1/32 Cessna O-2 `Jade 07'

Postby ericg » Fri Feb 09, 2018 9:32 pm

I ended up constructing a Vac form machine. It was very easy to do and cost very little as well. I was initially looking at buying a dental type machine, easily sourced on Ebay etc but felt that it may have been a bit small for future projects. I went to the local hardware store and purchased all of the required materials and built it myself. The good thing is that I can now apply my knowledge learnt from this project into larger machines as required.
I used pine for the sides and MDF for the top and bottom. Glued together with liquid nails for the seal and screwed together for strength. I drew a grid on the top surface and hand drilled the holes and then made a 32mm hole in one side to allow for the vacuum nozzle to fit into it.

The master is blu-tacked onto the top. The small slide on the vacuum nozzle allows me to back off the vacuum pressure as required.

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A $60 toaster oven with variable heat and a timer completed the set up.

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I initially tried a double sided frame made from Aluminium L bar but found it was a little big and I was using plastic up at a great rate, so made up a smaller one sided frame and just clipped the plastic onto it rather than sandwiching it between two frames.
Once the plastic is bowing down in the oven, I pulled out the frame and placed it upon the box, notice that my placement is far from square! Also notice that the master is a bit different from the one on my previous post a week ago. I was sent some Ureol modelling board from a mate of mine (actually the son of the subject pilot of my O-1 Bird Dog build) and I decided to re-make it in that. Great stuff and much better than balsa wood.

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The new window trimmed:

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And fitted:

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Much work went into producing that one window but I learnt alot from it! In the words of Borat, `Great Success!'

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