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Old Sep 08, 2005, 06:04 PM
RolfS is offline
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Please meet my two J29 Tunnan


Hi all,
Someone interested in my two new "Tunnan"?

The smaller (balsa covered) is built from the new MJD (http://www.mjd.se/) kit in scale 1:15. The bigger is my scratch-built Depron model at scale 1 : 12,5.

They both have the small EDF 60/15 Mk II fan. MJD uses the brushless Mini AC 1215/12 motor, I am using the smaller MP Jet 25-25/26 Mk2 in my bigger homebrew. They both run on 1250 mAh 11,1 V Etec batteries. The MJD version draws 14+ A, my smaller motor just around 9A.

They are both great fliers, though the smaller and hotter MJD-version feels more sporty. Careful (like the original ) flying with the MJD model gives around 10 minutes in the air, my Depron "Tunnan" gives up to 15 minutes.

I just love them!

BR,
Rolf
Last edited by RolfS; Sep 08, 2005 at 06:08 PM. Reason: Readdressed
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Old Sep 08, 2005, 09:33 PM
Sluf7 is offline
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nice job
Old Sep 08, 2005, 10:04 PM
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wow very nice!

Barry
Old Sep 09, 2005, 01:58 AM
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Rolf,

I like the Tunnan, but I am looking for a Minifan or better a Midifan size Tunnan.
I visited this summer the museum at Linkoping, they have some Original Tunnans there, very nice!

Heiner
Old Sep 09, 2005, 02:09 AM
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Heiner,
I agree with you, but I am still quite happy with these machines. Scale 1:12,5 gives a span of 887 mm, 1:15 gives 734 and very handy models. AUW around 500 g allows very scale-like flying.

BR
Rolf
Old Sep 09, 2005, 02:24 AM
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I had a look at the home page of mjd.se, the cost including shipment is 200EUR, that's more than I have to pay for 69mm or 90mm kits.

Heiner
Old Sep 09, 2005, 02:49 AM
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scratch one up Heiner! I would love to see a tunnan in mini or 90mm!

Barry
Old Sep 09, 2005, 04:32 AM
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Barry,

I am waiting for that kit, hoping to get the 90mm kit soon .....

Heiner
Old Sep 09, 2005, 04:36 AM
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Heiner,
Maybe we are used to different pricelevels. Compared to "our" pricelevels I do not think the MJD Tunnan is unusually expensive considering the kit quality(all hw including fan, laser cut high Q balsa, excl paint & glue).

With experience from my 1:12,5 scratchbuilt I do not think it would be too difficult to scratchbuild any size using styrofoam. Appr. 230 g thrust flies the 500 g model very well at 42 g/ sqdm.

BR, Rolf
Old Sep 09, 2005, 10:40 AM
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Quote:
Originally Posted by Heiner Skroblin
Rolf,

I like the Tunnan, but I am looking for a Minifan or better a Midifan size Tunnan.
I visited this summer the museum at Linkoping, they have some Original Tunnans there, very nice!

Heiner
Morris at ductedfans.com has a glass fuse and foam wing J-39 kit for the mini fan on his site:

http://www.ductedfans.com/jets_electric_saab_j29.html

Kirk
Old Sep 09, 2005, 12:05 PM
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Looks good. I like the foam work.

Never heard of that model company.
Old Sep 09, 2005, 02:15 PM
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Arbo,
MJD Models is a pretty new Swedish company, specialized in producing models of post WW II Swedish aircrafts.

BR,
Rolf
Old May 20, 2009, 03:58 PM
electriceye is offline
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Quote:
Originally Posted by RolfS
Hi all,
Someone interested in my two new "Tunnan"?

They both have the small EDF 60/15 Mk II fan. MJD uses the brushless Mini AC 1215/12 motor, I am using the smaller MP Jet 25-25/26 Mk2 in my bigger homebrew. They both run on 1250 mAh 11,1 V Etec batteries. The MJD version draws 14+ A, my smaller motor just around 9A.

Rolf
Hi Rolf,
They both look great. I have the MP Jet 25-25/26 Mk2 from an Alpha F-86 but it has the 3 bladed fan. What fan/how many blades does yours have and please could you tell me the AUW and any other specs, such as wing span, for the foam model?
Old May 21, 2009, 01:29 AM
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Hi ELECTRICEYE,
Facts about my scratchbuilt "Tunnan" :

Scale appr 1:12,5

Span 887 mm
Length 832 mm
Weight 520 g
Fan EDF 60/15 Mk II
Motor MP Jet 25-25/26 Mk2
ETC Jeti 12 Plus
Ack Etec 1250 mAh 3S1P (11,1 V)
Push/max current 230 g / 9A

BR Rolf
Old May 21, 2009, 03:36 PM
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Quote:
Originally Posted by RolfS
Hi ELECTRICEYE,
Facts about my scratchbuilt "Tunnan" :

Scale appr 1:12,5

Span 887 mm
Length 832 mm
Weight 520 g
Fan EDF 60/15 Mk II
Motor MP Jet 25-25/26 Mk2
ETC Jeti 12 Plus
Ack Etec 1250 mAh 3S1P (11,1 V)
Push/max current 230 g / 9A

BR Rolf
Many thanks Rolf, last questions, Is the 520g the flying weight? and how many blades on your fan?


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