SNCAC (Hanriot) NC-510 Army co-operation aircraft prototypes

[Caravellarella]

Dear Boys and Girls, here is an article in French about the SNCAC (Hanriot) NC-510 3 seat army co-operation prototype of 1938. The "Triplace de Travail" or "T3" which was designed to cover a range of other duties including observation, tactical reconnaissance and light bombing. The two NC-510 prototypes proved unsatisfactory and a new programme for a revised NC-530 was started by the former Hanriot design team at SNCAC.....

The article comes from the 15th January 1969 issue of Aviation Magazine International......

Terry (Caravellarella)

 

[Caravellarella]

Dear Boys and Girls, there is a much more comprehensive article in French about the SNCAC (Hanriot) NC-510 prototypes (both of which differed considerably) and the other 3 seat army co-operation "Triplace de Travail" prototypes (Dewoitine D.720, Potez 566 & Potez 220) in the April 1999 issue No. 353 of Le Fana de l'Aviation. I believe a second article appeared in the next issue......

Terry (Caravellarella)

 

[Tophe]

In the Trait d'Union #214 (Mar-Apr 2004) is a lot about the Hanriot H-240 (A19 requirement of 1936, NC-510) family: comparative 3-view of both prototypes, photograph of the 1st, 3-view and photograph of the derivative NC-530 prototype, mention of the project derivatives NC-511 (engines Renault 12 R0/1 of 450hp), NC-512 (Lorraine Algol of 450hp), NC-513 (14M 4/5 engines), NC-520 (project that will be turned into NC-530), NC-531 (530 with retractable landing gears and Renault 12 R0/1 engines of 450hp) and NC-532 (the same with Gnôme-Rhône 14N 48/49 of 1,180hp).

 

[Maveric]

In the Trait d'Union #214 (Mar-Apr 2004) is a lot about the Hanriot H-240 (A19 requirement of 1936, NC-510) family: comparative 3-view of both prototypes, photograph of the 1st, 3-view and photograph of the derivative NC-530 prototype, mention of the project derivatives NC-511 (engines Renault 12 R0/1 of 450hp), NC-512 (Lorraine Algol of 450hp), NC-513 (14M 4/5 engines), NC-520 (project that will be turned into NC-530), NC-531 (530 with retractable landing gears and Renault 12 R0/1 engines of 450hp) and NC-532 (the same with Gnôme-Rhône 14N 48/49 of 1,180hp).

Can you post the info´s about the H.240?


Thanks

 

[Tophe]

From the same magazine: "In answer to the A19 requirement, the Hanriot company proposed the H-240, with two engines Algol Lo 9 Na of 450hp, driving two-blade propellers with fix angle. It was a high wing airplane, having a fixed landing gear with spats. It was classified as "disposable machine", with wood and metal building and fabric cover. A prototype was ordered on August 23rd 1937. A few days later, the company proposed another project, more suited to the requirement, named NC-510 (with engines of either 450hp, or 670hp, or 750hp) and 3 prototypes of this one were ordered on August 28th 1937."

 

[Maveric]

no pic or drawing? :'(

 

[Arjen]

You asked for it, you got it.
From 'Warplanes of the Second World War: Bombers and Reconnaissance Aircraft, Volume Eight' by William Green, Macdonald 1967.

 

[Maveric]

So you will say: the Hanriot H-240 is the same like NC-510???

 

[Arjen]

the Hanriot H-240 is the same like NC-510?

I might be wrong, but yes, that's what I understand Tophe is saying.
Tophe:

...Hanriot H-240 (A19 requirement of 1936, NC-510) family...

 

[Tophe]

So you will say: the Hanriot H-240 is the same like NC-510???

Uh, not exactly: the H-240 project is the father of the NC-510 project:
- the H-240 has fixed landing gear (maybe like the NC-530) not retractable like the NC-510
- the H-240 has 450hp engines, the NC-510 may have three different engines but mostly 750hp
In the spring of 1938, it was decided to replace the 510's low observer bay by a glazed nose (not built this way on the 510 three prototypes, installed on the 530).
The final competitor of the NC-510 was the SNCAM D-700.

 

[Archibald]

Le Fana de l'aviation April 1999 - 353 had some assassine article on the T-3 program. A big waste, according to them. They were not very keen of Hanriot...

 

[Arjen]

Uh, not exactly: the H-240 project is the father of the NC-510 project:

Thanks for clearing that up.

 

[Maveric]

We have a chance to see a drawing of the H.240... :

 

[burunduk]

- the H-240 has fixed landing gear (maybe like the NC-530) not retractable like the NC-510

But NC-510 had fixed gears :-\

 

[Tophe]

Source: Trait d'Union magazine March-April 2004
At least one of the built NC-510 had retractable landing gears

 

[Tophe]

Source: Trait d'Union magazine March-April 2004

Even in this magazine Nr214, there are discrepant sayings: the NC-510 description reads "the fix landing gear had 4 meters between wheels" while the 2 three-views and the photograph show a retractable landing gear. It seems the preliminary project or final project had fix landing gear while the built prototypes had retractable landing gear.
EDIT: the page has changed, I posted a photograph on page 1.

 

[PhR]

The program for category T3 was first published by the Air Force headquarters in Septembre 1936. It was then formalized by the Air Ministry in December. A second edition was published in February 1938.
Hanriot initially proposed its H.240 project (2xLorraine 9Na 450 hp). After review, its proposal was replaced by the NC.510 which derived from H.240. It seems that the designation H.510 was initially used.
Then the Ministry placed the order 1158/7 for 3 prototypes in August 1938: one NC.510 (2x 9Kfr), one NC.511 (2x GR 14M4/5) and one NC.512. The 3 prototypes seems to have flown, but I know only photos of 01 and 02 (see attached).
Finally, the NC.510-01 was modified to become NC.530 Exp.

 

[Stargazer]

Then the Ministry placed the order 1158/7 for 3 prototypes in August 1938: one NC.510 (2x 9Kfr), one NC.511 (2x GR 14M4/5) and one NC.512. The 3 prototypes seems to have flown, but I know only photos of 01 and 02 (see attached).

Conflicting infos here:

• I have the first prototype NC.510 T3.01 ("avion de travail") with two 750 hp Gnôme-Rhône 9Kjr (not 9Kfr). It had round tail fins.
• I have the second prototype NC.510.02 (recce and trainer) with two 690 hp Gnôme-Rhône 14M engines as the NC.510 M, not the NC.511. It had redesigned tail fins.
• I have the NC.511 and NC.512 as both unbuilt, the former planned with two 450 hp Renault 12R 0/1 engines, the latter with two 450 hp Lorraine Algol engines.
• While NC.510.01 was transformed into NC.530 Expérience, NC.510.02 was apparently modified as NC.513, keeping its GR 14M 4/5 "Mars" engines, but I have no details about that modification.