90mm edf L-39

ERJets member Posts: 940	90mm edf L-39 Jun 4, 2008 0:49:44 GMT 8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ERJets on Jun 4, 2008 0:49:44 GMT 8 For those L-39 lovers.. Check it out. Owner and piloted by Mr Carl Rich rc-sf.com/video/reviews/review3/albatross.html
	Last Edit: Jun 4, 2008 0:50:35 GMT 8 by ERJets

dennisp
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Sembawang Skunk Works

Posts: 1,039

90mm edf L-39 Jun 4, 2008 20:51:14 GMT 8

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Post by dennisp on Jun 4, 2008 20:51:14 GMT 8

AIYO Duct Master so you think I can fly one of these things at 141mph +++++ ... >:(

But many thanks for the link it is so nice me like...,

So what I could not decide is this a modification to the Savex L-39 which was designed for a Coke can Wren 44...? or another bird..?

I remember watching Kelvin flying his turbine Savex L-39 and I am sure it never went at those speeds.... 8-)

ERJets
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Posts: 940

90mm edf L-39 Jun 4, 2008 22:13:56 GMT 8

Quote

Post by ERJets on Jun 4, 2008 22:13:56 GMT 8

Jun 4, 2008 20:51:14 GMT 8 dennisp said:

AIYO Duct Master so you think I can fly one of these things at 141mph +++++ ... >:(

But many thanks for the link it is so nice me like...,

So what I could not decide is this a modification to the Savex L-39 which was designed for a Coke can Wren 44...? or another bird..?

I remember watching Kelvin flying his turbine Savex L-39 and I am sure it never went at those speeds.... 8-)

Jedi Master, ofcouse you can.
Use the force. 8-)

Check out with Andre, he has a magazine which cover on this 90mm EDF L-39. :-*

ERJets
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Posts: 940

90mm edf L-39 Jun 4, 2008 22:15:16 GMT 8

Quote

Post by ERJets on Jun 4, 2008 22:15:16 GMT 8

Jun 4, 2008 20:51:14 GMT 8 dennisp said:

AIYO Duct Master so you think I can fly one of these things at 141mph +++++ ... >:(

But many thanks for the link it is so nice me like...,

So what I could not decide is this a modification to the Savex L-39 which was designed for a Coke can Wren 44...? or another bird..?

I remember watching Kelvin flying his turbine Savex L-39 and I am sure it never went at those speeds.... 8-)

Jedi Master, ofcouse you can.
Use the force. 8-)

Check out with Andre, he has a magazine which cover on this 90mm EDF L-39. :-*

dt8666 member Posts: 614	90mm edf L-39 Jun 5, 2008 13:14:39 GMT 8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by dt8666 on Jun 5, 2008 13:14:39 GMT 8 ER... time to get the 90mm with high high cell count out to the aky..

ERJets member Posts: 940	90mm edf L-39 Jun 5, 2008 14:19:23 GMT 8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ERJets on Jun 5, 2008 14:19:23 GMT 8 Jun 5, 2008 13:14:39 GMT 8 dt8666 said: ER... time to get the 90mm with high high cell count out to the aky.. Cumming soon DT... 10S on a 90mm size EDF.

dennisp
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Sembawang Skunk Works

Posts: 1,039

90mm edf L-39 Jun 5, 2008 17:35:42 GMT 8

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Post by dennisp on Jun 5, 2008 17:35:42 GMT 8

So ER you a naughty man ... >:(

as you expected I started an investigation into this model.... :-*

If you buy it from the USA it is not too bad.....

www.ductedfans.com/jets_electric_l39.html

Going to cost over US$ 1K without shipping...

Model - US$ 649
Paint job - US$ 178
Ducting - US$ 146
Dust strengthen - US$ 100

plus retracts Spring Air 301's
plus all the other krap.....

As you so correctly advised it is from Savex eith EDF 90mm or Wren 44.

www.savex.cz/prod.php?lang=en&id=10

Now where is my model money box....

??

dennisp member Sembawang Skunk Works Posts: 1,039	90mm edf L-39 Jun 5, 2008 17:41:52 GMT 8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by dennisp on Jun 5, 2008 17:41:52 GMT 8 So Duct Master if this one is happy to do 140mph on a 90mm fan and the FB one is only slighlty bigger then it should blow along nicely with a 120 or............... a 140 mm fan YES....?

ERJets
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Posts: 940

90mm edf L-39 Jun 5, 2008 20:41:33 GMT 8

Quote

Post by ERJets on Jun 5, 2008 20:41:33 GMT 8

Jun 5, 2008 17:41:52 GMT 8 dennisp said:

So Duct Master if this one is happy to do 140mph on a 90mm fan and the FB one is only slighlty bigger then it should blow along nicely with a 120 or............... a 140 mm fan YES....?

I dont know how heavy is your FB L-39, If AUW is around 7kg and having a proper ducting, flying it with a 5kg thrust 120mm EDF should not be an issue... 140mm? well if it sit in nicely, why not. :-*

but you will have to modify those intakes to have a better FSA which I think you will pass. 8-)

Last Edit: Jun 5, 2008 20:42:41 GMT 8 by ERJets

dennisp
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Sembawang Skunk Works

Posts: 1,039

90mm edf L-39 Jun 5, 2008 20:58:41 GMT 8

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Post by dennisp on Jun 5, 2008 20:58:41 GMT 8

Hi ER thanks for the feedback and advice, the P-70 powered ones tip the scales at 21lbs or about 9Kg fully loaded with kerosene the model is supposed to be for a P-60 as you know which is 5.9Kg blow lamp not sure what blow lamp power of a P-70 is ..?

With the latest generation of e-Turbax we can get almost 15lbs thrust or 6.8Kg of puff so we would have P/W ratio of 0.71 which would still allow the bird to fry.

The original e-Turbax with the xx21/1.5 Neu motor turns out 5.9Kg of puff same same as the P-60.... hmm that is interesting...!
P/W ratio of 0.62 so it would not be a rocket ship but it may still fry...?, may need to use the North South Expressway to get airbourne...

I suppose I should open the box and see what is inside, weigh it all, and check the area of the intakes to do check of FSA %.

The perhaps I should look at the destructions first and see what the issues are in respect of making ducts... re our discussion on the FE Rafale if there are formers all over the place then leave in the box LAH.....