Early Birds Fokker D VII engine run

Makhpiyaluta · 6 October 2009, 12:09 PM

Quote:

Originally Posted by krowerke

like it? no, i loved it-- thank you willem for posting this. what was the r.p.m. at initial idle? it was ticking over so slowly you can hear individual cylinders fire-- what a fine piece of machinery for 1918.
what was your coolant temp when you started cracking throttle open? outside air temp [OAT]?
i noticed at higher r.p.m. the propwash caused the fabric to flex on the bottom of the top wing almost out to the N struts-- interesting.
i also noticed the engine stuttered a beat or two when you opened the throttle. i'm guessing there is no accelerator pump on the carb; disadvantage in combat when you need immediate power response to slamming the throttle open. completely solved a couple of decades later by fuel-injecting the DB601.
octane rating of your fuel?
i now appreciate how the DVII was reputed to be able to hang on the prop in a dogfight.
okay, what's your guess about when someone will start recreating the MercD-III?

thanks again willem, you are a prince of the realm. more please.

Krowerke,

In this video I started the engine with some hard to find new (in 1918) pair of ZH6 magnetos it took some time to find them that's why progres has been so slow last year. When it starts on mag switch 1 anlass it idles at 400rpm later you can hear me switch to mag 2 rpm going up to 500 and then I switch to both mags at 600rpm. When I opend the throttle the water temparature was stil to low some 60 dgrees celsius thats why you heard the loud bang. I was abit to eager. When it's at working temparature I can slam the throttle at full power or close it suddenly and it keeps running fine there is only a bad running periode between 600 and 900rpm so you have to push the throttle through. We run it on 98octane unleaded. It's amazing how much torque this engine has when at full power you are literaly blown away when standing behind it.
My guess about someone recreating this engine? Way out of most peoples league maybe Mr. P. Jackson and his crew wil ever try who knows.
Ofcourse I don't work on this plane alone and most of the credits go to all who helped.

Willem

Makhpiyaluta · 6 October 2009, 12:18 PM

Quote:

Originally Posted by Jeff Brooks

Willem,
Buck Tonges and I were wondering about the W&B, and CG range of the DVII. What did you guys use on your plane, and how does it fly?

Jeff,

We wil be doing weight and balance in a few weeks so I can't answer on that one yet. I hope to have the maiden flight before winter and otherwise spring next year. I won't fly it myself this wil be done by Bert Huizenga a very expierianced pilot who flew all kinds of types and was European champion aerobatics in his Pitts few times. He's also going to be pilot of our P-51 when ready.

Willem

P.S. package arived today in good order thanks!!!

Makhpiyaluta · 6 October 2009, 12:21 PM

Quote:

Originally Posted by buck toenges

I also want to know how you hop into that cockpit so easily. I can't get my leg up high enough over the turtle deck!
Buck

Buck,

It's easy just like getting on a horse. You have to make a good swing and pull up. I've had two hernia operations and I can do it

Willem

Makhpiyaluta · 6 October 2009, 12:24 PM

Quote:

Originally Posted by buck toenges

Willem,
Do you know the weight of the radiator and how much water it used?
Buck

The system uses some twenty liters of water and the radiator weighs about twenty kilos so filled thats a little under 40 kilos.

Willem

Von Writter · 26 October 2009, 09:50 AM

Hi Willem;
Is there any chance you know what the center of gravity of the engine from the prop hub is ? I've been looking everywhere for it and no luck anywhere! Placment if the engine CG relative to the aircraft CG is really what I need but....;o) This info would help a lot of us who aren't fortunate enough to have an original engine.

Makhpiyaluta · 26 October 2009, 01:49 PM

Weight and balance will be done next weekend when the guy isn't struck by swineflue. As soon as I have the figures I will pass them on to you all. I don't know the CG of the engine but I will get into that also.

Willem

Von Writter · 26 October 2009, 06:23 PM

Quote:

Originally Posted by Makhpiyaluta

Weight and balance will be done next weekend when the guy isn't struck by swineflue. As soon as I have the figures I will pass them on to you all. I don't know the CG of the engine but I will get into that also.

Willem

That would be just super nice of you Willem

Thank you SOOO much!! I've been looking everywhere for this information!

Makhpiyaluta · 8 November 2009, 06:08 AM

Some more footage of our D VII enjoy!

YouTube- Fokker D VII Mercedes D IIIau

YouTube- Fokker D VII Mercedes D IIIau

Willem

Von Writter · 8 November 2009, 08:43 AM

Hi Willem, very inspiring! I noticed you have a tail wheel on your DVII (don't worry I'm not taking any issue with it

) I was wondering if you have any photos you could send of how you attached the springs and cables? I'll be doing the same thing on mine and there is no use reinventing the wheel so to speak

Makhpiyaluta · 8 November 2009, 09:03 AM

Quote:

Originally Posted by Von Writter

Hi Willem, very inspiring! I noticed you have a tail wheel on your DVII (don't worry I'm not taking any issue with it

) I was wondering if you have any photos you could send of how you attached the springs and cables? I'll be doing the same thing on mine and there is no use reinventing the wheel so to speak

If we had a large meadow or something like that to our use I wouldn't have added the tailwheel or brakes. But we have to be able to taxi on a modern airport with one runway so we need them. Although maybe we try to make a steerable skid one day but for now it's like this.

Willem