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Jetmach Sport E for Kolibri

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Jetmach Sport E for Kolibri

Old 11-10-2009, 03:27 PM
  #26  
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Default RE: Jetmach Sport E for Kolibri

I wasn't for sure glad it worked out
keith
Old 11-11-2009, 04:40 PM
  #27  
siclick33
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Default RE: Jetmach Sport E for Kolibri

The fuselage is coming along nicely and I will post pics soon.

I have come across another small issue. It looks like the design of the fan mounting has been changed at some point. The enclosed photo CD shows lots of photos of the fan mounted behind the former F6. The plans show it in front of F6. I am pretty sure the latter is correct but the fan mounting plate and doubler do not fit correctly. It is not a major problem but does stick out as the rest of the parts are incredibly accurate.

I am pointing out the problems more than the good things but, so far, I do think it is a very nice kit and is going together very quickly.
Old 11-12-2009, 04:12 AM
  #28  
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Default RE: Jetmach Sport E for Kolibri

I am drooling over this Pushy Cat for a Kolibri...

If it goes with an AXI brushless motor 220 KMh, well... it will be ballistic with a Kolibri... and it is different than all these deltas lately...
http://www.south-coast-sailplanes.co...s/pushycat.asp

http://www.youtube.com/watch?v=xBM_SMvft80

http://www.youtube.com/watch?v=DgVdc...eature=related
Old 11-12-2009, 04:56 AM
  #29  
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Default RE: Jetmach Sport E for Kolibri


ORIGINAL: SpiderJets

I am drooling over this Pushy Cat for a Kolibri...

If it goes with an AXI brushless motor 220 KMh, well... it will be ballistic with a Kolibri... and it is different than all these deltas lately...
http://www.south-coast-sailplanes.co...s/pushycat.asp

http://www.youtube.com/watch?v=xBM_SMvft80

http://www.youtube.com/watch?v=DgVdc...eature=related

go for it..
that is one unique model
Old 11-16-2009, 02:42 PM
  #30  
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Default RE: Jetmach Sport E for Kolibri

Here is the fuselage so far and it is coming along nicely. I haven't done any reinforcement yet but have a couple of places I want to beef up. In the main the fuselage has come out pretty strong and light.

The wings are a different story[]

Firstly, I got a bit confused by the instructions when talking about the root rib dihedral jig and glued it in wrong. Fortunately I realised early and removed it without difficulty. The wing is built the right way up on the plans so the root angle is applied in the standard way (I thought the wing was built upside down initially).

Secondly, the ribs and rib doublers do not match. I thought the ribs were correct so filed out extra holes on the doubler but now think that the doublers are correct. This isn't a major issue but does require a bit of work to correct.

Thirdly, the plans show the position of the retract unit but in reality it can't go there as there is a rib in the way. I might be able to cut part of the rib away but I will have to wait and see. There may be a delay here as I want to try the new E-Flite electric retracts but they aren't available yet.
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Old 11-19-2009, 08:25 PM
  #31  
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Default RE: Jetmach Sport E for Kolibri

go to hobby city site look at there light weight air retracts
Old 11-19-2009, 09:34 PM
  #32  
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Default RE: Jetmach Sport E for Kolibri


ORIGINAL: siclick33

Here is the fuselage so far and it is coming along nicely. I haven't done any reinforcement yet but have a couple of places I want to beef up. In the main the fuselage has come out pretty strong and light.

The wings are a different story[]

Firstly, I got a bit confused by the instructions when talking about the root rib dihedral jig and glued it in wrong. Fortunately I realised early and removed it without difficulty. The wing is built the right way up on the plans so the root angle is applied in the standard way (I thought the wing was built upside down initially).

Secondly, the ribs and rib doublers do not match. I thought the ribs were correct so filed out extra holes on the doubler but now think that the doublers are correct. This isn't a major issue but does require a bit of work to correct.

Thirdly, the plans show the position of the retract unit but in reality it can't go there as there is a rib in the way. I might be able to cut part of the rib away but I will have to wait and see. There may be a delay here as I want to try the new E-Flite electric retracts but they aren't available yet.
sislick33, thanks, I've made the corrections to the rib doublers.
Bob
Old 12-16-2009, 08:20 PM
  #33  
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Default RE: Jetmach Sport E for Kolibri

LG-9-0001-S
Micro Pneumatic Retract Landing-gear set
Micro Pneumatic Retract Landing-gear set

Micro Pneumatic Retract Landing-gear set suitable for models up to 3.5lbs.

Specifications :
Low profile 0.472in (12mm) when retracted
Frames 6061-T6 & 7075 aviation grade aluminium
Auto down if air tank is empty.
Each Retract weight : 10g / all parts 88g
Suitable for EDF & Warbirds models up to 3.5lbs




check these retracts at hobby city ouy I have some in f15 there great and really light
Old 01-01-2010, 12:02 PM
  #34  
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Default RE: Jetmach Sport E for Kolibri

Here is the latest progress.

The basic wing structure is done. The biggest problem I came across is that the 'ply' dihedral brace is quite weak if flexed fore/aft (not something that should happen in flight) and during my ham-fisted building I snapped it in half. I glued it back together and added a carbon brace which will hopefully hold it all together.

Other mods I have done:

All spars replaced with spruce (plans call for balsa on the main spars and bass on the rear spars).
Extra balsa added on outer TE for reinforcement and to provide additional glueing area for aileron hinges.
Aileron servo bay widened and reinforced with play to allow Hitec HS 82MG servos in standard wing mounts to fit.

Other mods that I intend to do:

Add additional wood behind root LE to allow 2 wing retaining dowels instead of the single one suggested.
Reinforce the bottom of the wing join as there is a potential weak point where the spars join.

The electric gear is in stock in the US now so I have ordered some as it won't be available in the UK until Feb. I had previously asked horizon for the mounting dimensions so hopefully it will fit in the wing mounts. http://www.e-fliterc.com/Products/De...ProdID=EFLG110
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Old 01-07-2010, 03:26 PM
  #35  
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Default RE: Jetmach Sport E for Kolibri

The wing top surface has been sheeted and flaps and ailerons have been completed. The flaps will be fixed.

Now I have to wait for the gear before I can close up the bottom of the wing.
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Old 01-26-2010, 01:05 PM
  #36  
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Default RE: Jetmach Sport E for Kolibri

I now have the gear and it fits

The gear itself is tiny and 1 3/4 inch wheels just fit without modification. I am really looking forward to the electric retracts and not having to worry about air systems.
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Old 02-05-2010, 02:58 PM
  #37  
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Default RE: Jetmach Sport E for Kolibri

Slow but steady progress. Bottom of wing is now sheeting and cut out for servos and gear. The flaps have been glued in place. A little bit of filling/sanding and the wing will be ready to cover
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Old 02-14-2010, 03:28 PM
  #38  
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Default RE: Jetmach Sport E for Kolibri

Still a bit to do but progress is continuing. The wing is pretty much done. The fuselage needs a bit of strengthening but is nearly there.

I have cut a large canopy hatch to make accessing the components easier. You can just about see that I have located the elevator servos by the base of the fin. It will look a little funny but will be very practical. I am using a Hitec HS5085 MG for each elevator half. I have drilled a hole through the tailplane and the rudder will be operated with a torque rod by a servo underneath the tailplane.

The photo isn't great as the light is a bit funny but it does look really good
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Old 02-14-2010, 03:41 PM
  #39  
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Default RE: Jetmach Sport E for Kolibri

Photo of the underside showing how well the Kolibri fits. The 16oz Dubro tank fits perfectly as well, right over the c.g.
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Old 03-12-2010, 11:37 AM
  #40  
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Default RE: Jetmach Sport E for Kolibri

The wings are now covered and the fuselage is almost complete. As you can see, I have cut a hatch on the top for access to the electronics. The nose gear takes up a lot of room so there isn't much left for the electronics but it should be ok.

I was beginning to worry about the balance with 3 of the servos and the engine being quite a bit behind the c.g. but an initial test shows that it shouldn't be too bad; maybe a little bit of noseweight will be required.

Total weight so far is about 1.3kg (2.9lbs) so I'm aiming for 3.5lbs dry which I think is pretty good considering it has retracts and a turbine

My next job is to install the rudder servo and sheet the underside of the rear fuselage. Then I can fuel/heat proof and it will be ready for covering.
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Old 03-12-2010, 10:16 PM
  #41  
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Default RE: Jetmach Sport E for Kolibri

Looks really good, won't be long now
Old 04-06-2010, 03:14 PM
  #42  
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Default RE: Jetmach Sport E for Kolibri

The install is continuing but it is very tight[X(]

I've moved the manual shut-off valve back and will be putting the filter in front of the engine to remove these items from the canopy area.

The turbine Lipo will hopefully sit above the gear unit but I might have to cut a hole in the nose area to find room for the Rx battery. The ECU and Rx will have to fit in the small area towards the back of the canopy. Unfortunately this will put the Rx and ECU very close together but I'll have to see how it goes as there aren't many other options. The satellite Rx will fit a little further back on top of the fuel tank.
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Old 04-06-2010, 04:08 PM
  #43  
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Default RE: Jetmach Sport E for Kolibri

Hi Darren, so it going to be ready for it's maiden this sunday at Elvington, also hope you found the problem you had with your flash on sunday
Old 04-06-2010, 04:19 PM
  #44  
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Default RE: Jetmach Sport E for Kolibri

Desperately hoping to have it ready for Sunday but it's the little bits at the end that seem to take forever. Also have a Habu on the way that I hope to have ready. If I've got these to fly then I'll probably bring the Flash out again for some fault finding.
Old 04-06-2010, 04:37 PM
  #45  
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Default RE: Jetmach Sport E for Kolibri

finger crossed you get it done and the weather plays ball for the maiden
Old 04-13-2010, 02:41 PM
  #46  
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Default RE: Jetmach Sport E for Kolibri

Nearly there

The install is complete and there is just a bit of tidying of servo leads, trim to add and minor tweaks to finish off. The weight has come out at 3.9lbs dry which is a bit heavier than I had hoped. I think the engine/airframe strength and power will be perfect but I am a bit worried if the gear will be strong enough. Time will tell.

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Old 05-02-2010, 09:15 AM
  #47  
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Default RE: Jetmach Sport E for Kolibri

All complete

It is now ready for the maiden. That might not be for a couple of weeks but I'll post details when it's done.

It needed a bit of noseweight so ended up being 1.92 Kg (4.25 lbs) dry, which is a bit heavier than I'd hoped but not too bad. I think it's turned out pretty good

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Old 05-02-2010, 10:29 AM
  #48  
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Default RE: Jetmach Sport E for Kolibri

really nice.
Bob
Old 06-16-2010, 07:09 AM
  #49  
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Default RE: Jetmach Sport E for Kolibri

Darren, what did you use as heat protections on the under side of the rear fuse, i have an idea of what i am going to do on my e-turbinator, just thought i'd compare to what you have done
Old 12-21-2010, 05:07 AM
  #50  
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Default RE: Jetmach Sport E for Kolibri

This project is still going but hasn't flown yet. I couldn't get the engine to run properly but I have eventually found time to strip the model down and bench run it.

Now all is working as it should so the engine install will begin again. Hopefully some flying news soon

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