|
|
Post by Dave Homewood on May 22, 2020 18:41:26 GMT 12
Most likely the wear on the prop came from operating from the coral and gravel strips in the islands, which had a sandpaper effect on leading edges props and clogging of air filters among other challenges! Why would the leading edge be affected by coral dust when the airflow is surely all behind the propeller? Did the flow of air suck in the coral to the front of the prop? Or is that from taxiing behind other planes that are blasting out coral dust and sand behind them? |
|
|
|
Post by nzgrasshopper on May 22, 2020 19:00:13 GMT 12
There were a number of glass plate negatives amongst the sample that I had access to. Rather nerve racking printing from those. Key was to remove the top glass in the enlarger and reply on the weight of the glass to keep everything flat. A number of the film negatives were a bit distorted from heat exposure and poor storage, so the prints weren't always focused across the entire image. The shot taken at Ondonga was from a 10" x 8" negative printed at 50" x 40". A lot of detail and interesting bits to find when looking over it.
I made contact prints at the time for studying and cropping for the enlargements. Will try and find them.
|
|
|
|
Post by lesterpk on May 22, 2020 23:15:40 GMT 12
When repainting P3 prop tips the fronts were always worn worse than the rear faces. Air travels over both surfaces.
|
|
|
|
Post by tbf25o4 on May 23, 2020 9:40:42 GMT 12
As above, the leading edges were the first to be hit by the gravel/coral/stones etc. If you look at a lot of smaller GA aircraft that taxi across grass fields, a similar scuffing is usually seen
along with pitting from stone chips also on the leading face of the prop.
|
|
|
|
Post by Dave Homewood on May 23, 2020 12:42:05 GMT 12
Thanks. I'd not really given it much thought before but I guess it makes sense.
|
|
|
|
Post by tbf25o4 on May 23, 2020 13:01:59 GMT 12
From the general scuffing and 'nicks' the term dressing the prop is how a LAME or maintenance technician files out the chips and dents on the edges of the prop. At Kapiti Aero Club when I was the CEO
there was an ongoing programme to do this with students often crossing over from the grass to the seal in places where chips flew up and damaged the prop
|
|
|
|
Post by nzgrasshopper on Jun 10, 2020 16:51:52 GMT 12
Finally back from a 12 1/2 week field deployment. Corona free and back in the workshop for a couple of weeks. Fuselage station #10  Forming of the frame.  Assembled frame  |
|
|
|
Post by Dave Homewood on Jun 10, 2020 16:55:43 GMT 12
Woohoo! I am so pleased to see some progress. I love this project.  |
|
|
|
Post by Deleted on Jun 11, 2020 0:49:45 GMT 12
Welcome back! I'm so glad to see you back at it.
|
|
|
|
Post by nzgrasshopper on Jun 14, 2020 21:44:24 GMT 12
|
|
|
|
Post by Dave Homewood on Jun 14, 2020 22:43:01 GMT 12
Superb!
|
|
|
|
Post by planecrazy on Jun 15, 2020 9:37:06 GMT 12
This is so good the detail is just amazing which got me thinking. A question grasshopper
if you don't mind could you give us an idea, for example how many hours would you have
invested to create the piece in the last picture posted?
Thank you and looking forward to seeing more.
|
|
|
|
Post by nzgrasshopper on Jun 15, 2020 14:26:20 GMT 12
This is so good the detail is just amazing which got me thinking. A question grasshopper if you don't mind could you give us an idea, for example how many hours would you have invested to create the piece in the last picture posted? Thank you and looking forward to seeing more. The frame itself was made over the weekend, around 12 hours. The drag box was made a while ago, along with joining it onto the frame all up around 3 hours. The reinforcing deck was also made a while ago, around 3 hours. Over the last 14 years, several thousand hours have been spent building along with several hundred hours researching and finding material such as miniature screws and rivets. Interpreting the drawings is almost as difficult as building the parts. Each drawing has to be scaled and then each piece has to be noted as to which side of the frame it is, forward or aft. |
|
|
|
Post by planecrazy on Jun 15, 2020 14:41:54 GMT 12
Thanks so much, made a few models in time but this is just next level
looking forward to seeing more, I hope one day this model will be on
display somewhere, that would be awesome!
|
|
|
|
Post by nzgrasshopper on Jun 19, 2020 17:11:23 GMT 12
|
|
|
|
Post by Dave Homewood on Jun 19, 2020 21:47:32 GMT 12
Those look very handy.
|
|
|
|
Post by nzgrasshopper on Jun 19, 2020 22:17:14 GMT 12
Sure are, will be able to get the rivet spacing pretty accurate now. |
|
|
|
Post by danwalker on Jun 22, 2020 20:40:35 GMT 12
This is so good the detail is just amazing which got me thinking. A question grasshopper if you don't mind could you give us an idea, for example how many hours would you have invested to create the piece in the last picture posted? Thank you and looking forward to seeing more. The frame itself was made over the weekend, around 12 hours. The drag box was made a while ago, along with joining it onto the frame all up around 3 hours. The reinforcing deck was also made a while ago, around 3 hours. Over the last 14 years, several thousand hours have been spent building along with several hundred hours researching and finding material such as miniature screws and rivets. Interpreting the drawings is almost as difficult as building the parts. Each drawing has to be scaled and then each piece has to be noted as to which side of the frame it is, forward or aft. |
|
|
|
Post by danwalker on Jun 22, 2020 20:52:53 GMT 12
Fantastic effort and dedication, my hat is off to you sir! Do you mind if I ask where you found your supply of rivets? I currently make 1.2mm and 1.5mm aluminium rivets for hobby work as haven't yet been able to find a suitable supplier.
|
|
|
|
Post by nzgrasshopper on Jun 22, 2020 23:28:01 GMT 12
|
|
