Recent content by Engineman

Hi Larry, Thank you for your generous reply. I hope that your Museum fund-raising day goes well! Please don't hesitate to ask for more info. The Bf 109 F-4 blade is fairly rare as it was bespoke to that version with the DB 601 E engine. The prop hub on the F-4 was also only applicable to the...

Probably worth looking at internet search for pics of the aircraft. You can satisfy yourself on what you find. Eng

Good compilation. Eng

The early aircraft Handbuch for the Bf 109 G-1 undercarriage (dated March 1942) does show the outer wheel doors, and the retractable tailwheel. The Hydraulic system is still shown with these parts in the September 1942 issue. However, there are few photo's of production aircraft with the outer...

I think we have all covered the realities of AvGas vapour pressure, pump uplift limitations and the advantages of air pressurised tank feed in some detail. Great to read all the info posts on here! Eng

Here are the aircraft service instructions for the Bf 109 G-1,3,5 and G-2,4,6. Note, Part B, para 4. on both documents headed Fahrwerk translates; "Landing Gear Two shock struts, retractable sideways into the wings, and a nonretractable tail wheel." However, the Flugzeug Handbuch chapters do...

Well, this is the situation. Messerschmitt had planned both outer mainwheel doors and the retractable tailwheel on the Bf 109 F designs. However, only the retractable tailwheel made mass production on the F. Notwithstanding that, there is photo proof of outer mainwheel doors on some G...

The chance of overspeeding the engine with a WW2 VDM electric propeller would depend upon several factors. The first possibility is that the system was not selected to Automatik or, it was a purely manual (Hand) version. Sticking with the Bf 109 E, this was a Hand-only system until about early...

This would depend entirely on the fuel pump and the carburettor system. Many P-47 R-2800 engines used the Bendix Stromberg PT13 Pressure Carburettor. This carburettor did not feature a fixed rate of fuel return to the tanks. What it did have was a vapour separator operated by a float valve...

Hi! Am I reading this right? B-2, B-4? Cheers Eng

Thanks for your descriptive video Tom! The Ratier electric hollow shaft prop is ingenious, but it is very complex and with a high parts count. I notice that there is basic similarity in the electrical switching and functionality of the VDM hollow shaft electric propeller, but the VDM electric...

The DB 610 engines did have considerable problems in development. Some of the problems were involved with vibration and resonance. The firing order was changed to suit the needs of the engines in the coupled version. Interestingly, the firing order was changed with the same crankshaft. This...

Yes, looking at pics of TP814 (412951) show it had the gondola cannon up to and including the final accident. Also it was NOT an AS engined version and, it did not have MW50. Eng

Well, the retractable tail wheel (with open aperture, no door) was actually deleted after the F model. However, some early G versions seem to have had the retractable function retro fitted, probably with F parts. Likewise, the reference to larger tail area is possibly more of a E to F version...

Post #2 by PAT 303 reflects that the aerodynamics and engineering developed fast. As far as the Bf 109 F/G goes, they were 1939/40 aerodynamics. By 1943 they were behind the contemporary state of the art but were forced to continue. Of course, Willy Messerschmitt had moved-on to the Me 262 by...