Sparky (oz85)


Sparky (oz85) from Comet 1940 - plan thumbnail

About this Plan

Comet Sparky. Rubber powered cabin model. Comet kit no. R9.

Quote: "Hi, thanks for this splendid collection! I have built this lovely Sparky from this plan. I found minor inaccuracy in the balsa cut scheme: the round tail wing parts E3 and E2 are of different size to fit the plan correctly. Kind regards! Jan."

Supplementary file notes

Alternate (previous) version. Same plan, same scan, but with marginally less detail and the title block shows Comet #L10 instead of #3408.


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Sparky (oz85) from Comet 1940 - model pic


Sparky (oz85) from Comet 1940 - pic 003.jpg
Sparky (oz85) from Comet 1940 - pic 004.jpg
Sparky (oz85) from Comet 1940 - pic 005.jpg
Sparky (oz85) from Comet 1940 - pic 006.jpg
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User comments

Hi Steve, I just spotted your Sparky plan. I that plan up 10% and built one RC a few years ago. Here's a couple of pictures [more pics 003, 004], plane flies great, had to add clay on the tail for balance.
Paul - 25/06/2014
Hi Steve, I built this Sparky from the Comet plans on your site [see more pics 005], second one I've built. First one was in 1959 as the first plane I ever built covered with tissue. It even flew after my less than expert construction. Back then I failed with the partly carved kit prop blank, but a second one whittled from apple crate wood worked fine. It eventually was destroyed after encounters with trees. This new one is covered with Doculam with Krylon trim, weighs 4-1/2 oz, with Eflite 200 motor, Berg RX, Castle ESC and 2 cell 250 lipo. I used a 7x3 GWS prop, APC won't fit. I added a spar on top of the flimsy wing to give a little more strength. Comet neglected to indicate CG, but the other Sparky plan on your site shows it at about 70%. I didn't believe this and first tried it at 50%, which turned out to be really nose heavy. Weight in the tail eventually brought it back to the suggested 70% where it flies well. I had to cut it open and move the servos back to get rid of the added weight. The motor is waaaay more power than needed and the elevator servo is seldom used. If I build another one, a smaller motor and rudder only will save some weight.
DougSmith - 01/03/2015
Pics of his completed model Sparky [see more pics 006-008] are thanks to MarcoAGuillermo.
SteveWMD - 04/06/2015
Hi Steve, please find attached a couple of photos of my Comet "Sparky" you might care to add to an (admittedly somewhat) overcrowded plan photo album. [We did :) - see more pics 009, 010] This one was originally built in the early 1980s by a friend of mine, now unfortunately deceased, from a Comet kit. The name shown in the nose of the model is a tribute to that dear friend. In refurbishing it, I kept the original, kit-built, fuselage, and added Depron flying surfaces and a micro Parkzone RC 'brick' for control. Power comes from HK Nano-tech 160mAh or 200mAh 1S batteries. Depron undercambered wings are used instead of the original balsa ones to allow the model to be more easily flown Indoors. But it has flown outdoors too, in very light/no wind conditions. It flies as beautifully as I remember seeing 'in the old days', when it was rubber powered. In its present form it can easily be trimmed to circle hands-off within half a handball court. This model was recently the subject of an article in RCMW (Feb 2016), as an example of how to refurbish/update an old rubber powered model. Please do keep up your excellent work. RCLibrary was a great idea, and a very useful addition to your OUTERZONE fantastic site. Best regards
ArnaldoCorreia - 10/03/2016
Here are some photos of Comet's Sparky - skeleton, static and flying [more pics 011-017]. Built with Outerzone plans. Thanks again for such a treasure as Outerzone, the time and effort from all concerned is truly appreciated.
AndyCoutts - 17/08/2016
Hi Mary and Steve, please find attached a couple of photos of My Sparky - when I was flying it under rubber power [more pics 018-020]. It was the only time I used a winding tube (in PVC - so a breaking rubber motor would not destroy the fuselage) and a winder (actually a manual hand drill with a hook in the chuck). I never 'stuffed' it with rubber, always preferring a short, nice flight... that would not thermal, as it never had a dethermalizer! The photos are not that good, as they are scans from slides... slides from the early 1980s, I might add.
ArnaldoCorreia - 01/05/2017
I am attaching some pictures of the Sparky that I have recently built [more pics 021-023]. Fuselage strengthened and two spars in the wing. Covered with lite span and flies very well. I have now carves a balsa prop but not yet flown it with this prop on.
RogerR - 30/04/2019
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