Pilot-RC Extra NG 78" - Under The Hood of this Electric Setup
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- Опубликовано: 17 сен 2024
- A Look at the equipment driving this beast - particularly inside the canopy and cowl. Electric setup employing 10S 50C battery, Dualsky ECO5330C-225kv motor and Mejzlik 20x12E prop ---- 3000watts, pretty handy! This translates to 560watts/kg.
Scheme: Green/Carbon
Wingspan: 1970mm (78")
Weight: 5.7kg
Music: www.bensound.com
Excellent run through I think we need more of these detailed type pix .. far too many endless flying showing off .. of no help to others on a “how to” basis.
Well done
Cheers
Ray NZ
Very impressed with everything except the motor mounting bolts. It would appear to create some significant point loads on the box and has no bracing. I assume by now you have plenty of hours on the plane. Has this been an issue?
Are you engineering orientated? Structurally, the portalised nature of the motor support renders it VERY STIFF. I have employed this method of support on many planes and for many years - these threaded bar portal frames work extremely well!!
@@eddrakes Thanks for the reply. I will give it a try.
Thanks for the response. Is the triangle stock used to beef up the landing gear and firewall?
All airframe structures are as they were out of the box. All I have added is my equipment and red-painted support platforms for that equipment.
How did you manage the build without the build manual? Any problems?
I have built plenty of these before. So, some experience helps.
Try using this manual (online) which matches the 78" version quite well.
pilot-rc.com/manual-extra-ng-103/
Nice plane. Did you balance at the indicated CG location? It seems a bit too far back
Hi Maria. Starting balance point (CG) was as per the inner fuselage markings - approximately 20mm behind the back side of the joiner tube. Upright followed by up side down flight tests then indicated how the CG should be adjusted to suit my flying style. My style is F3A or IMAC --> large aerobatic manouvres. I move the battery to achieve my required balance point.
@@eddrakes Thanks Ed..
Ed, still thinking about this. My CG mark is 27mm behind the wing tube. Do you recall how much closer you moved to the wing tube for final balance after flight testing?
@@marianolte8233 Since I fly and adjust weight to get the result required in the air, I have no CG marker in the plane. This is all subject to your flying style of course. I prefer precision aerobatics - large manouvres - resulting in a more forward CG location. Additionally, I employ a stabiliser which not only stops the annoying wobbles caused by wind, but also compensates for problems with CG. In other words you can quite off the correct CG position but lean on the stabiliser to keep your plane level! Similarly, a stabiliser obviates problems with all the trims caused by badly centering servos. Go to this URL to calculate your CG - fwcg.3dzone.dk/
Max size propeller? 25"?
Just to clarify your question, do you mean 25" prop at 12" pitch, same motor and same battery? If you did that you would blow up the motor and ESC and battery pretty quickly!!
According to eCalc, all things remaining as shown and just changing the prop diameter to 21" would put the motor near to its power limit.
I like to run my equipment quite cool while still getting the performance required for the aerobatics I do. I get 560watts/kg (on the equipment shown) which is plenty for easy verticals.
@@eddrakes Distance from motor center to wheels center in order to know max size prop, I´ll use different motor....
Plane level - distance from motor centreline to ground is approximately 330mm.
@@eddrakes ok thanks