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Pegna and Piaggio - Italian floatplane / seaplane projects - Schneider Trophy

Maveric

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Hi all,


I search for drawings, pics and technical data for the early italian water aircraft: Pegna II, III, IV, V, VI and Guidoni DCG.3.


Thanks for your help.
 

hesham

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hesham

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And a studying concepts;
 

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Kdmoo

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Here is a photo of the Pegna-Rondine.

hesham- Was the Pegna-Bonmartini-Cerrone a project only or was it built? Thanks.
 

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hesham

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Kdmoo said:
Here is a photo of the Pegna-Rondine.

hesham- Was the Pegna-Bonmartini-Cerrone a project only or was it built? Thanks.


Hi Kdmoo;


frankly,I don't know,but could be any Italian member knows.
 

fightingirish

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Hi folks


here some Italian high-speed floatplane / seaplane projects from Pegna and Piaggio, featured in the article "Nie geflogen - trotzdem berühmt, Signor Pegnas Superrenner >>Pinochino<<" from Ferdinand C. W. Käsmann, published in the German annual book "Flieger Kalender 2007 / 2008", pages 116 to 126.




Dear mods and dear members, please feel free to move or mention these attachments in other topics.
 

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hesham

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OH my memory is too bad,


we had this topic,but its title wants to change;


http://www.secretprojects.co.uk/forum/index.php/topic,13401.msg211873.html#msg211873
 
W

Wingknut

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Maybe this should be in 'Patent Pending' (if so, apologies) - anyway:
'Fin system for hydroaeroplanes and/or water aircraft' (US 1776700 A).
Publication date: 23rd September 1930; Filing date: 12th April 1929.
Inventors: Giovanni Pegna.
Cheers, 'Wingknut'.
 

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Tonton-42

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roadrunner2 said:
The PC-7 was one of the most fabulous seaplane ever build.
I do a 1/48 model .

Hello !

Do you know that ? This is from an old Modèle Réduit d'Avion number 591 (the famous MRA !) and Mister Vassel is an exceptionnal modelist !

Regards.

Tonton
 

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blackkite

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Hi PC-7!
http://doz.jp/wordpress/blog/category/piaggio-p-c-7/

http://alain.vassel.pagesperso-orange.fr/piaggio.htm
 

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roadrunner2

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Hello,
all you can want is here: http://giadel.webnode.it/
photos: http://giadel.webnode.it/foto/
plans and drawing: http://giadel.webnode.it/menu/disegni/
 

blackkite

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Thanks a lot. I imagine that PC-7 skin cooler(radiator and oil cooler) was not a evaporative type,too.
 

Schneiderman

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English translation by NACA of Pegna's paper describing the PC-7 development
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930094725.pdf

and the original in Italian
http://www.avia-it.com/act/profili_daerei/aerei_di_ieri_e_di_oggi/Aerei_ieri_e_oggi_Avia_Files/PA_aerei_ieri_AVIA_files_agg_genn_07/1_Idrovolanti_da_corsa/Idee_sugli_idrovolanti_da_corsa.pdf
 

hesham

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Hi,

very odd design from Pegna,it was a catapult launch seaplane,what was its propulsion ?,
looks like a turbojet or pulsejet ?.

http://www.avia-it.com/act/biblioteca/periodici/PDF%20Riviste/Ala%20d'Italia/L'ALA%20D'ITALIA%201934%2004.pdf
 

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Schneiderman

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The text says propulsion a reazione, which translates, roughly, as jet propulsion. What kind I do not know, this is a paper from 1934 so many years before any workable jet propulsion system had been run
 

hesham

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Thank you Schneiderman,

but a jet airplane from 1934,so weird ?.
 

Schneiderman

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Yes it is very unusual. There is an air intake behind the cockpit and exhaust by the tail so it has to be some form of jet rather than a rocket but 1934 is very, very early for such a concept.
 

Schneiderman

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From Wikipedia, perhaps someone can provide more details

In 1931, Italian engineer Secondo Campini submitted a report on the potential of jet propulsion to the Regia Aeronautica, and demonstrated a jet-powered boat in Venice the following year. In 1934, the Regia Aeronautica granted approval for the development of a jet aircraft to demonstrate the principle.
As designed by Campini, the aircraft did not have a jet engine in the sense that we know them today. Rather, a conventional 900 hp (670 kW) Isotta Fraschini L.121 RC.40 12-cylinder liquid-cooled piston engine was used to drive a three-stage variable-incidence compressor, which forced air into a combustion chamber where it was mixed with fuel and ignited. The exhaust produced by this combustion was to drive the aircraft forward. Campini called this configuration a "thermojet," but the term "motorjet" is in common usage today. It has also been described as a ducted fan.
The relatively small duct resulted in low mass flow, and thus low propulsive efficiency. In modern designs this is offset through high overall pressure ratios, but the N.1 had a low pressure ratio and thus low thermal efficiency as well. As a result, the engine had relatively low thrust, about 1,550 lbf, and very poor fuel economy.
 

Schneiderman

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More information from Campini's 1932 patent for a jet-powered aircraft. So it seems that Pegna's concept was based quite closely on Campini's work.
 

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hesham

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Amazing Info Schneiderman,many thanks.
 

hesham

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Hi,

https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930094725.pdf
 

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