Planes > Scale
Airco DH2
johnfireball:
Hi John,
This film is available at any graphic art printing consumables supplier it is called laminating film not to be confused with encapsulating film. The gloss finish type is cheaper but not sure about paint adhesion. If you wish I could send you some of the 30 micron in the post. This stuff is a pleasure to work with.
John.
johnfireball:
Hi John,
I tested my roll on pink foam and it takes no problem. I'm not sure if all roles of film will behave the same as on the forum link it is suggested that high iron temperatures are needed where mine will melt if iron is too hot.
http://www.presco.eu/sub-category.php?ID=4&parentCatID=1
Link to where I got mine it's the 30micron roll on the top right.
John.
johnfireball:
Hi All,
A little more done and testing of all the gear in progress.
Tailplane construction
Laminating fin outline
Gear installation
Overall view with base colour applied to flying surfaces
Hi Keith,
I think you may be correct about prop pitch. With testing I can run at full power for 18+ mins per charge but feel I'm lacking thrust. No signs of overheating. Amazing power for such a small motor. Do the gears need lubrication? The motor is also turning the dummy engine and doesn't seem to be a problem. This motor could not be a better fit in this model. I could fit an 8" prop with more pitch to try gain some more push as I feel the rpm of the prop is quite low. Any suggestions welcome.
John.
Happy Days:
Hey John,
As I think I mentioned before, I’m sure someone experienced with these types of models has told me that three (or more) bladed props don’t work very well at these very small diameter sizes. :!: (Some of the racing model lads use single bladed props. Yes you read that correctly! i.e. “half” a propeller)
If I were you I’d remove that three bladed prop and fit the two bladed one. Then run it up and see if it produces any more thrust. I would imagine it would, and that the run time per charge would be reduced, showing that the motor is doing more work.
As for the gears: yes they will need lubrication, but I have no idea what would be the correct lubricant to use on them I’m afraid.
You said that the dummy engine is turning with the prop. So presumably the full size plane used a rotary engine rather than a radial one, yes?
Where are you intending to fly this home made marvel?
K.
johnfireball:
Hi all,
Thrust problem solved with use of an 8" slow fly prop which suits my low rpm geared motor. Yes Keith dh2 was powered by a 100hp gnome rotary engine
http://www.youtube.com/watch?v=CYc-H8Wg-MQ
Apparently this engine was a barn find
Undercarriage and new prop
John.
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