By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by CML

Electrify Flair Kite

Wanting to determine ideal leccie set up

All Topics | Latest Posts

Search for:  in Thread Title in  
Peter Roberts27/02/2013 13:17:47
avatar
195 forum posts
20 photos

I've previously built a Flair Kite kitted with a J'En 57 which is sprightly and I enjoy a lot. However I have just bought an unstarted Kite kit and want to produce an electric version because I think it would be a great plane to fly and would be a durable trainer for the club on electric only flying days.

I think including battery all up weight is likely to be 2.8kg plus 750g for battery and wondered what everyone thinks would be the perfect motor, esc, battery combo. I have 4s, 5s and 6s Lipos available.

I haven't got endless funds but imagined that something like a 5055 with 80a esc might be quite doable? What do you think - any advice please?

Edited By Peter Roberts on 27/02/2013 13:18:23

Richard Wood27/02/2013 14:32:51
avatar
1096 forum posts
164 photos

Hi Peter,
I think you're on the right tracks there.
I used 5055/580 in a 5.5lb kit built Wot 4 & it powered it superbly.
I used a 4000mAH 5S Lipo with a 12x8 prop & a 70A ESC.
This will be quite a powerful set-up - equivalent to around a .52
two stroke.
There are many other suitable options of course - it's worth a look
at the electric flight database on this site for alternative ideas.
 

Oh yes - something just springs to mind. Identically spec'd motors
from different suppliers can perform differently! - so check your setup
with a Wattmeter.

Cheers.

 

Edited By Richard Wood on 27/02/2013 14:48:19

Peter Roberts27/02/2013 14:46:30
avatar
195 forum posts
20 photos

Thanks Richard - I was also fairly conscious of the prop clearance. I've used 11x7 and 12 x 6 on my ic version

Pete B - Moderator27/02/2013 16:44:07
avatar
Moderator
7656 forum posts
734 photos

A useful starting place are the recommended setups here at 4-Max, Peter.

A browse should find a model of a similar type and weight and that will point you in the right direction for a suitable combination.

Pete

Richard Wood27/02/2013 17:06:02
avatar
1096 forum posts
164 photos

More useful than this Pete??wink 2

**LINK**

Pete B - Moderator27/02/2013 18:28:28
avatar
Moderator
7656 forum posts
734 photos

Sshhh, Richard - are you trying to get me into trouble with the Forummeister?teeth 2

Good resource there, toothumbs upsmile

Pete

Peter Roberts02/03/2013 08:31:44
avatar
195 forum posts
20 photos

As I mentioned I think prop clearance will be an issue as well as fitting the battery size in the tank bay. I'm unsure whether to move the firewall or open a bulkhead up to allow a suitable battery to fit?

Peter Roberts21/06/2015 21:49:20
avatar
195 forum posts
20 photos

Wow - have finally built the Kite using a Mk 3 kit. altho the fuse is lighter than the ic equivalent all up weight is over 8lb! I therefore felt the need to change the motor to a '60' equivalent (using the hobby king one with a 12 x 8 prop and a 6s 4000mah battery. My 5s 5000 battery was heavier so didn't go there.

Initial problems were climbing when adding power. That has been solved by putting about 4º of downthrust to the motor and reducing the prop size slightly but without a lot of downtrim on the elevator she will climb anyway. CoG is spot on for the model - although that took a fair amount of weight at the back end and I want to diagnose why it needs so much down elevator trim. Concensus at the club is incidence problems which seems surprising as the wing was foam core and sheeted and the seating for the wing is clearly built into the model plan and side shape. If anyone has any ideas I would be grateful - especially as my aerodynamics is not up to the idea.?

Peter

Peter Roberts21/06/2015 21:50:36
avatar
195 forum posts
20 photos

PS the prop, motor, battery combo pulls 950w at full chat and draws around 40+Amps

kc22/06/2015 16:11:59
6520 forum posts
173 photos

Nobody else has replied-yet

The obvious thing to check is the tailplane incidence. Next thing would be to check if the wing is lifting - often happens with banded on wings. Cure is more or stronger bands. Might lift with wing bolts too if the dowel is loose.

If that is OK then it would be worth checking to see if perhaps both ailerons are drooped causing an undercambered type wing section to be formed.

john stones 122/06/2015 16:35:33
avatar
11538 forum posts
1517 photos

Try using packing pieces at the rear end of the wing/fuzz, take various thickness pieces to field with you and suck it and see, when/if you sort it you can then glue them in and tidy it up.

John

Peter Roberts22/06/2015 18:10:18
avatar
195 forum posts
20 photos

I find it difficult to understand why this should happen when the wing seating and tailplane are set by the fuselage sides which are lazer cut out when you but the kit. The wings are pre formed so is puzzling.

Thanks for your suggestions I will try both sets and see what happens. I think the wing bands are pretty strong but then there will be quite a force on them I suppose so will add some extras to be sure.

Many thanks Peter

Edited By Peter Roberts on 22/06/2015 18:10:38

Old Geezer22/06/2015 18:34:37
670 forum posts

Also try The Electric Wingman - he suggested I electrified an artf WOT4 with an AXI 4120/14 turning a 13x8 on 4S. Similar weight I guess - more than adequate performance.

All Topics | Latest Posts

Please login to post a reply.

Latest Forum Posts
Support Our Partners
electricwingman 2017
Sussex Model Centre
CML
Slec
Advertise With Us
Sarik
Latest "For Sale" Ads
Has home isolation prompted you to start trad' building?
Q: The effects of Coronavirus

 Yes - for the first time
 Yes - but Ive bashed balsa before
 No - Ive existing projects on the bench
 No - Im strictly an ARTF person

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E!