Duende V model from RC Model magazine 1983.

Brad, I'm waiting to be able to make some purchases abroad when government regulations allow me to, in the meantime I have some questions for you and I'm grateful, so:

Glow Plug Turbo for .074:
1) Can you post detailed photos of the original Norvel glow plug turbo holder? Maybe at some point I can make one with my lathe and test the result.

2) Do you have a comparative data between??:
a)Norvel traditional glow plug .074
b)Norvel glow plug Turvo .074
c)Kamtechnik Turbo Head .074

I don't intend to create controversy, just take note and learn from it, thanks!

Hi can reference my post on pg. 1, shows photos and data:

Kamtechnik Turbo Plug adapter test APC 6x4E
19,864 rpm / 23.3oz thrust / .292hp - 214w / 75.2 mph pitch speed
+1,211 rpm more power than the stock Norvel plug.
Vs
Norvel Turbo Plug / APC 6x4E
18,653 rpm / 21oz thrust / .242hp - 181w / 71 mph

Also, here is the radial mount:

Yes Brad, I have seen the Norvel accessory, I just wanted to see it in different positions without the internal glow plug, I think that accessory is not that complicated to make. Thanks again!

Here is the link to the .074 turbo plug adapter.

https://kamtechnik.com/product/ktk-17/

Turbo Head .074 Norvel:

Thanks Brad, I was referring to the Norvel accessory, I might be able to do that with my lathe.
As for Greg's accessories, I'll try to buy them in 2025, since I can't use PayPal from Argentina for now.

more progress...
applying dope to parts of the Goblin - Duende ...

Per Norvel site:

http://www.nvengines.com/index.php?page=shop.product_details&flypage=flypage-ask.tpl&product_id=181&category_id=6&option=com_virtuemart&Itemid=65

.074 Head adapter set for turbo plugs: Price: $12.99

Plane is looking really good Mauricio ! Is that a lacquer your using to seal the balsa ? I am guessing the servos and other equipment will bee added from the bottom of the fuse

Dear friends, I am happy to be part of this wonderful forum! For this reason, I take this opportunity to wish you a Merry Christmas...I hug you from Argentina!


Let's go with a compilation....part 1

Beautiful work as always, Mauricio. Congratulations. Merry Christmas and Happy New Year to you and to all CEF friends and families.

Good work!

Very nice work on the canopy and the plane itself looking Great Merry Christmas to you also

getback wrote:Plane is looking really good Mauricio ! Is that a lacquer your using to seal the balsa ? I am guessing the servos and other equipment will bee added from the bottom of the fuse

Thank you very much Eric, yes, the radio equipment is incorporated from the bottom, that is, the wing is removed and you already have the onboard equipment at hand.
The liquid you see being applied with the brush is dope, the one used in aeronautics and aeromodelling to cover fabric or paper.

Thanks Andras!
Thanks Levent!
Thanks Roddie! I'm already getting better. I've been three weeks since surgery. I'm wearing a patch on my butt that I take off three times a day until the wound (fistula) has finished draining. The doctor says it will take about 35 days to fully recover, but I think this time is the final one!
I have to recover, wait for it to heal properly and get back on my bike. In this 2-year period, I've gained about 6 kilograms again! So I have to start exercising again! Haha.

Friends, in RC Model magazine, the author of the article says:
"Probably the beauty of its line is due to that mix between airplane and glider."



In my opinion I agree with the author, this model is really beautiful, then I remembered the beautiful Sportavia model by Cox, which has a wingspan of 1780 mm, that is, about 70 inches.
Could someone tell me how long the fuselage of the Sportavia is? I am working on the wing of my Duende V. I could make another set of wings and take it to 70 inches, if the length of the fuselage coincides in some way with that of the Sportavia. I could also do a calculation and achieve a motor-glider ratio using the fuselage.
I would be grateful if anyone could give me the data on the length of the fuselage of the Sportavia!...thanks!

Hola Mauricio!!! Your video shows fine craftsmanship and engineering….Many custom made parts that would not be available any other way…. Excellent hand skills along with the use of technology

In this acritical it says that both the elect. and nitro have 70" WS >> https://www.ebay.com/itm/304633005233 thats all I could find on the Sportavia

getback wrote:In this acritical it says that both the elect. and nitro have 70" WS >> https://www.ebay.com/itm/304633005233    thats all I could find on the Sportavia  

Thanks Eric, always so kind!
Look, I made a scale, I'm not precise in the photo, but I can roughly calculate it.
I compared the Cox cone holder, in the photo
The Cox cylinder in the photo.
All the calculation gives me an average length of 710 mm, that is to say about 28 inches, am I right?

31" from firewall to tail. 1" per block.



Total fuselage length 36.5" Spinner to Rudder:

Thanks a lot Brad! I was wrong by three inches!...ok!
so my fuselage at that point measures 26 inches, so I could make a proportional wing.
Thanks for your time my friend!

31" from firewall to fuselage end.
36.5" from spinner to rudder.

Here I go with the Duende's half-wings.
Before continuing to cut ailerons and join half-wings, I share a detail of them.
Created from arc cuts of nicron wire, electric source, the styrofoam cores are plated in 1.5 mm thick balsa.
As a detail, the entire trailing edge has a finish (for personal taste, not listed in the magazine), with dope and Silkspan paper, this gives real strength to the entire edge since it is very thin. The upper plating joins with the lower without Spars.
Looking at the wing profile, it seems to be the NACA 2412, the author of the design does not clarify it, but by the shape I think I bet on that wing profile.
Technical Data, (source WIKI), NACA 2412 Profile: The NACA 2412 aerodynamic profile is an asymmetric profile that is used in aviation and aerospace applications. It is characterized by its good aerodynamic performance in a wide variety of flight conditions.
Each wing weighs only 65 grams, which makes me think that the model will have very good performance.