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| Electric Flight Discuss Electric Flight in Canada |
Topic Review (Newest First)
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| 09-03-2011 06:57 AM | |||
| chuebner |
Re: pkz corsair porpoising Quote:
Quote:
FYI Center of Gravity Location: • The center of gravity on your F4U Corsair should be located approximately 2-1/2” (62-64mm) behind the leading edge of the wing, when measured against the fuselage. This CG location has been determined with the ParkZone 1800mAh 11.1V Li-Po battery installed. |
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| 09-02-2011 10:57 PM | |||
| Edmonton |
Re: pkz corsair porpoising So, to determine the weight to balance the plane, is it the weight to tip it over from when it is horizontal like when flying (this is what I suspect), or the weight required to raise the tail wheel off the ground and tip the plane forward? |
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| 08-31-2011 07:39 AM | |||
| Xanadu |
Re: pkz corsair porpoising Quote:
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| 08-30-2011 07:44 AM | |||
| gi1mo2 |
Re: pkz corsair porpoising I have a corsair, and did break the tail off, and in grass my landings end up in a forward flip (I prefer not doing belly landing). I always use 5 min epoxy to fix. Not much weight, and very strong. I coated the top of the tail with epoxy for strength. Your fiberglass added too much weight to the plane. Epoxy will do just fine. |
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| 08-29-2011 10:16 PM | |||
| Xanadu |
Re: pkz corsair porpoising Quote:
There you go, now you know why the COG is off. Rebalance it, and go have fun. |
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| 08-29-2011 11:07 AM | |||
| Edmonton |
Re: pkz corsair porpoising The problem is I have had a few... um... shall we say less then graceful landings, this has resulted in the tail breaking off and also the point where the wings attach to the body has broken, so I have used some light fiberglass to fix, strengthen the wing and fuselage where the wings connect to, so that added a bit of weight to the back. |
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| 08-29-2011 10:57 AM | |||
| Tyler P |
Re: pkz corsair porpoising Quote:
I used up to 2500mah packs in my Corsair. I had to carve out the battery slot a bit but it worked out very well. The weighting is all dependent on where you place the battery in the slot. Pushing it farther forwards will give you more nose weight. Sliding it back will give you less nose weight. Just move your battery forwards or backwards until you get the proper balance. |
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| 08-29-2011 10:52 AM | |||
| Edmonton |
Re: pkz corsair porpoising I am just using the stock 1800 battery right now. If I go to a different battery, is there a way to easily change the weighting based on the battery? |
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| 08-29-2011 10:42 AM | |||
| russ |
Re: pkz corsair porpoising I have the same plane, what size battery are you using? Just thinking if you're going to add weight to the nose, why not add useful weight? |
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| 08-29-2011 10:24 AM | |||
| Edmonton |
Re: pkz corsair porpoising Great, thanks - yes I did check that and at first it was sticking as the hinge for the elevator had broken - once I retaped it there was some binding so I rearranged things and that is now clear. I think I need to add some weight to the nose of the plane. I got a couple blocks of wood, taped a pencil to each one and placed the plane on them at the location that I believe is the c of g (2.5 inches back of the wing mount measured at the center - only problem is moving that location out to about the wing servo's). When I try to balance the plane it seems tail heavy but if I push down a bit on the nose then after about an inch of pushing down it then tips forward. I placed washers on the top of the cowl and figured it takes about 4 washers (0.9 oz) to make it tip forward so will look to add this amount somehow to the front. |
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