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take-off dolly for sm. profile c/l models

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take-off dolly for sm. profile c/l models

Post  roddie on Wed Jun 10, 2015 10:24 pm

I mentioned this proto-design in the reed-speed thread. I'm trying to make it a reality. It cradles a profile fuse; having a vertical notch in it's belly.. near the c of g.. that straddles a pin in the cradle. The cradle-pin is adjustable fore./aft.




The rod at the tail-end will support two flaps which will lay over the horizontal tail-plane; holding it down with weight. The cradle's angle of incidence should allow the model to lift-out in short order.. I hope.

I need to build a test-model.. and have one in  mind. I'll call it the T33-Dee...


Last edited by roddie on Wed Jun 10, 2015 10:57 pm; edited 2 times in total
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Re: take-off dolly for sm. profile c/l models

Post  roddie on Wed Jun 10, 2015 10:46 pm

Here's the tail-end showing the rod for the tail's hold-down flaps. It will have a pin-stooge release linkage.



If the design functions satisfactorily.. the cradle width is adjustable for fuses up to 3/8" wide. The O/A length wouldn't accommodate a model much bigger. This prototype is primarily for 1/2A to A size models.
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Re: take-off dolly for sm. profile c/l models

Post  rsv1cox on Thu Jun 11, 2015 6:47 am

robbie, what will you come up with next. You have a creative mind, what a blessing.

Bob
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Re: take-off dolly for sm. profile c/l models

Post  roddie on Tue Sep 01, 2015 7:34 pm

rsv1cox wrote:roddie, what will you come up with next.  You have a creative mind, what a blessing.  

Bob

Thanks Bob. I haven't spent much time on the hobby this Summer. A new job and a very busy band schedule is sapping a lot of my energy.

The only work I've done on this dolly, is an idea that I had in just the last few days. The pin that holds the models' fuse.. (via a vertical slot in the belly near the c of g) locates lower than I'd like, in the cradle. This could over-complicate Shocked having the model locate easily in the dolly's saddle. It only needs to be restricted from forward motion. The stab./elev. are weighted by a split-flap that is hinged at the rear of the dolly's cradle.. and lays over the tail-plane. This feature is also intended to help hold the model level. The theory is; when the model generates enough lift from the dolly's inclined angle of attack.. it will slide-up off the pin, and the tail will slide forward and out from under the flaps.



This is the idea I thought of a few days ago.. It uses a wire-tie through the previously-drilled holes for the pin, to form a loop over the top of the saddle. The model won't have to sit as deep in the cradle; as it would with my original pin concept.



The wheels are always turning in head. Right now I'm thinking of another possible mod. I won't say "stay tuned".. because who knows how soon I'll post the results.. tongue
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Re: take-off dolly for sm. profile c/l models

Post  akjgardner on Tue Sep 01, 2015 7:39 pm

I Likey
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Re: take-off dolly for sm. profile c/l models

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