Electric Pattern Aircraft Discuss epowered pattern aircraft in this forum

Spark F3A, from Krill Models - SPAIN TEAM

Reply
Old 06-25-2011, 11:40 AM
  #301
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM


Quote:
ORIGINAL: Aussie_Knife_Edge

Hi Guys,

Modifications to my elevators are now complete.. Just waiting for the paint to dry..

If you own a Spark Dynamic and you're using the supplied stabs (not the built up ones Dave Snow offers), you really should do this mod. If not, you risk servo failure, rudder cable failure or even worse a total loss.

Cheers,
Jason.
I am rekitting a used Spark Dynamic so I also came along this design fault. I would think in normal flight this should not be an issue; however if you snap it's a different story I think.

What kind of snap settings (deflection in degrees of each surface) does one typically use for rudder and elevator?

Volkert
wagen017 is offline  
Reply With Quote
Old 07-17-2011, 05:05 AM
  #302
mups53
 
Join Date: Jan 2002
Location: Hoffman Estates, IL
Posts: 2,313
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

This is a modification that I've made to my Spark Dynamic. I've seen in done by a few fliers and my hope is it will add some yaw stability.
Also I'm using a new prop designed by Hatta from Japan. Hatta is using the Hacker Q80 as am I. The prop size is 19x12.5. I replaced a Rasa 20.5 x 14 and I really think this prop is a huge improvement. With this prop I get better braking on downlines and its a tad slower on the flats which I needed to have happen. The pull and climbing strength are equal to the Rasa.
Best improvement is my routine is using about 5 to 10% less mils from the pack on avarage. Before a routine would use 3900 to 4000 mils now I'm avaraging 3600.
I've yet to try the new stab fences but hopefully I'll get to test it today. Mike Mueller
Attached Thumbnails
Click image for larger version

Name:	Mk27526.jpg
Views:	87
Size:	78.2 KB
ID:	1636285   Click image for larger version

Name:	Ax73230.jpg
Views:	71
Size:	76.8 KB
ID:	1636286  
mups53 is offline  
Reply With Quote
Old 08-06-2011, 10:55 AM
  #303
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

today I lost my Spark Dynamic! [:@] This is really a bummer since the plane flew so well!!!

I just wondered if anybody had a similar failure. The wingtube broke out of the right wing completely during the P011 figure 1 (M). Please let me know.

PS: I don't blame Krill or anything, I am just curious since I haven't heard about such failure.

Volkert
Attached Thumbnails
Click image for larger version

Name:	Sq46714.jpg
Views:	84
Size:	123.4 KB
ID:	1645038  
wagen017 is offline  
Reply With Quote
Old 08-06-2011, 03:39 PM
  #304
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Hi Volkert,

That really sucks mate!

I've not heard of such a failure before. On my 2008 Spark I did a small cart wheel on landing in extremely strong wind. It happened as a strong gust got the model airborne again and there was little I could do. This particular field is like landing on an aircraft carrier. There is a 20' drop at the end of the runway! Needless to say, after my flight the comp was called.... Anyway, I thought the worst (and so did others) but when we got to the model there was only minor damage. One wheel pant was damaged and the wing TE had punctured the fuse a little. Upon further inspection, I found the glue joints on one wing tube socket had fractured. It was easily fixed and the model is still carving up the sky.

Can you post some pictures of the failure? Pictures tell a thousand words....

I'm currently building (assembling) a Spark Dynamic. Progress is slow but I will finish it soon....

Cheers,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 08-06-2011, 09:41 PM
  #305
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Don't know if this picture tells it; the only thing you can clearly see is that the outer tube is just completely gone, ripped out of the wing.

Volkert
Attached Thumbnails
Click image for larger version

Name:	Tr51726.jpg
Views:	121
Size:	76.4 KB
ID:	1645309  
wagen017 is offline  
Reply With Quote
Old 08-07-2011, 12:28 AM
  #306
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Hi Volkert,

I'm amazed at how the root rib has shattered like that as it's glassed both sides. [X(] As I stated, I did a slow speed cart wheel with my Spark and it didn't damage the root rib at all....

I note that your aileron linkage is broken. Did this happen when the model hit the ground? Might be a clue....

Regards,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 08-07-2011, 10:25 AM
  #307
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM


Quote:
ORIGINAL: Aussie_Knife_Edge


I note that your aileron linkage is broken. Did this happen when the model hit the ground? Might be a clue....

Regards,
Jason.
I think that happened at impact. However, you never know.....

Volkert
wagen017 is offline  
Reply With Quote
Old 08-07-2011, 01:00 PM
  #308
nonstoprc
 
nonstoprc's Avatar
 
Join Date: Sep 2003
Location: Central, TX
Posts: 2,452
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Seems the side of the fuse gave in as the wing retaining nut is still on the wing.

Sorry this happened.
nonstoprc is offline  
Reply With Quote
Old 08-07-2011, 01:29 PM
  #309
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM


Quote:
ORIGINAL: nonstoprc

Seems the side of the fuse gave in as the wing retaining nut is still on the wing.

Sorry this happened.
The wing tube mounting would have had to have failed in the wing for that to happen.

Volkert, what happened to the front wing mounting screw?

Did the wing tube break?

Cheers,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 08-07-2011, 02:26 PM
  #310
nonstoprc
 
nonstoprc's Avatar
 
Join Date: Sep 2003
Location: Central, TX
Posts: 2,452
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

A piece of the fuse is still with the rear wing mount screw, if you look that area carefully. To save weight, the wing mounts are just two thin pieces of plywood glued to the side in a E-power plane. The area has to be strong enough to withstand the pull from the two wing halves.
nonstoprc is offline  
Reply With Quote
Old 08-07-2011, 02:51 PM
  #311
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM


Quote:
ORIGINAL: nonstoprc

A piece of the fuse is still with the rear wing mount screw, if you look that area carefully. To save weight, the wing mounts are just two thin pieces of plywood glued to the side in a E-power plane. The area has to be strong enough to withstand the pull from the two wing halves.
There shouldn't be any forces on the two wing retaining bolts. The ply rings are quite adequate and don't forget the wing adjuster aft of the rear bolt. The tube and socket should take all the stresses and loads. Having said that, the tube and socket on the Spark is very short. It must be adequate though....

If I had to put my family jewels on it, I'd say the wing tube socket mounting has failed on the outboard end. It actually looks like the wing has split apart on the LE join and then the skin peeled back.

I'm curious to know where the front wing bolt and root rib is...

Cheers,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 08-07-2011, 02:56 PM
  #312
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Actually, the more I look at the picture, the more it looks like the LE glue joint has failed. It almost looks like the glue has not adhered to the top skin.... If that joint had failed, the whole wing integrity would be compromised..

Cheers,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 08-08-2011, 10:56 AM
  #313
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

well, I had one more (and final look) into the garbage can.

To answer some questions:
- the other wing retaining bolt was found broken off in the fuse
- the wing tube is still in one piece
- the outer tube of the broken wing I found with the fuse but it was broken in two (split down the length). The actual outer tube is very thin but still not easy to break so that is interesting
- the aileron was seperate of the wing when I found it

Jason, you triggered some thought with me. Maybe the aileron linkage broke, the aileron started fluttering which caused the wing to go???

Volkert
wagen017 is offline  
Reply With Quote
Old 08-08-2011, 01:25 PM
  #314
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM


Quote:
ORIGINAL: wagen017

well, I had one more (and final look) into the garbage can.

To answer some questions:
- the other wing retaining bolt was found broken off in the fuse
- the wing tube is still in one piece
- the outer tube of the broken wing I found with the fuse but it was broken in two (split down the length). The actual outer tube is very thin but still not easy to break so that is interesting
- the aileron was seperate of the wing when I found it

Jason, you triggered some thought with me. Maybe the aileron linkage broke, the aileron started fluttering which caused the wing to go???

Volkert
Hi Volkert,

Flutter is what I was thinking with the linkage breaking. The fact that most of the wing looks intact is a clue. It's hard to tell from the picture but it looks like you're using the glued carbon/titanium linkage set-up. If this is the case, did it break on the glue joint or at the end of the titanium insert? It also looks like the kevlar hinge has separated. hard to tell from the picture but the outside end looks unusual.

Splitting the wing tube socket sounds strange. Can you post some pictures?

I'd be contacting IVO about this if I were you. He may be able to offer some insight and in all honesty, if there's a problem, he needs to know...

Regards,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 08-09-2011, 07:30 AM
  #315
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

all that was left is now in the garbage and I don't really want to look at it anymore!!

The Spark Dynamic is a great airplane so once I have collected my thoughts again I really want to have another one! This year I have lost two planes (after 5 years without anything...), really sucks.

Volkert
wagen017 is offline  
Reply With Quote
Old 08-09-2011, 01:23 PM
  #316
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Hi Volkert,

Not only does it suck, it really hurts the hip pocket.

On the positive side, perhaps upgrade to the new Spark EVO?

Best thing to do is jump right back onto the horse.

Cheers,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 08-09-2011, 10:05 PM
  #317
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

I will definitely go for a new Evo but I will first now finish this season with my good old ZNLine Twister!

I did sent a short mail to Ivo Krill, let's see if something comes out.

Volkert
wagen017 is offline  
Reply With Quote
Old 09-04-2011, 08:11 AM
  #318
rgreen24
 
rgreen24's Avatar
 
Join Date: Jan 2002
Location: Omaha, NE
Posts: 1,074
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Has anyone flown the Spark Dynamic and Evo 1 to see which one flies and presents better, it looks like the dynamic has a taller canopy and is a little more forward, any thoughts?
rgreen24 is offline  
Reply With Quote
Old 01-27-2012, 12:22 PM
  #319
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Hi Guys,

Well, today is the day of reckoning. My Spark Dynamic is finished ready for maiden flight. I don't expect any dramas as I have set it up the same as my 2008 Spark.

I'll post some pictures and a brief report on how it flies compared to the older Spark tonight.

Cheers,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 01-27-2012, 12:36 PM
  #320
wagen017
 
Join Date: Oct 2003
Location: Eindhoven, NETHERLANDS
Posts: 958
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

It should be very close! Enjoy!!!

Volkert
wagen017 is offline  
Reply With Quote
Old 01-28-2012, 01:11 AM
  #321
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Hi Guys,

The Spark Dynamic has been maidened. It was uneventful really which is good. Out of the box it needed one click of up trim, one click of left aileron and three clicks of left rudder. I have since made some initial adjustments to get all back to neutral. Only small adjustments were needed to do that. Now the real trimming starts.... On LH top knife edge there's a slight pull to the belly so the CG probably needs moving forward. Downlines have a slight pull to the canopy. Wing incidence will be tweaked to reduce that. On the old Spark I actually had 3% down elevator mixed in with low throttle. This model will probably be the same. Early days..

As promised, attached are some pictures.

Cheers,
Jason.
Attached Thumbnails
Click image for larger version

Name:	Yw68165.jpg
Views:	47
Size:	112.9 KB
ID:	1720056   Click image for larger version

Name:	Zu65311.jpg
Views:	37
Size:	106.6 KB
ID:	1720057   Click image for larger version

Name:	Jo30598.jpg
Views:	78
Size:	103.2 KB
ID:	1720058   Click image for larger version

Name:	Rl26453.jpg
Views:	39
Size:	176.5 KB
ID:	1720059   Click image for larger version

Name:	Cn78048.jpg
Views:	35
Size:	151.8 KB
ID:	1720060  

Click image for larger version

Name:	Ct16160.jpg
Views:	31
Size:	142.8 KB
ID:	1720061   Click image for larger version

Name:	Hj86462.jpg
Views:	42
Size:	158.1 KB
ID:	1720062  
Jason Arnold is offline  
Reply With Quote
Old 02-24-2012, 12:24 PM
  #322
Jason Arnold
 
Jason Arnold's Avatar
 
Join Date: Aug 2005
Location: Sydney, AUSTRALIA
Posts: 1,266
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Has anyone actually worked out what the MAC is on the Spark? With the wing's unusual shape it's not an easy calculation.


Regards,
Jason.
Jason Arnold is offline  
Reply With Quote
Old 02-24-2012, 06:23 PM
  #323
cmoulder
 
Join Date: Jul 2006
Location: Ossining, NY
Posts: 2,819
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM


Quote:
ORIGINAL: Aussie_Knife_Edge

Has anyone actually worked out what the MAC is on the Spark? With the wing's unusual shape it's not an easy calculation.


Regards,
Jason.
Seems the diagrams don't take into account the step and the extra sweep at the tip!

Where is your CG relative to the wing tube? Mine is now at the back edge of the wing tube.

BTW, I replaced the stock UC (163 grams) with that of PT model (103g). The stock gear look great but were too flexible, at least on mine. So the PT version is stiffer and cuts 60 grams.
cmoulder is offline  
Reply With Quote
Old 03-30-2012, 01:27 PM
  #324
rgreen24
 
rgreen24's Avatar
 
Join Date: Jan 2002
Location: Omaha, NE
Posts: 1,074
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Anyone seal the aileron or elevator hinge on there Spark?
rgreen24 is offline  
Reply With Quote
Old 03-31-2012, 05:47 AM
  #325
woodie
 
woodie's Avatar
 
Join Date: Jun 2002
Location: Placerville, CA
Posts: 1,142
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Spark F3A, from Krill Models - SPAIN TEAM

Do you mean the gaps on the bottom?

Woodie
woodie is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 12:06 PM.