Mike,
What an excellent job! Do you still have the 4 bladed prop installed? I'm going to try to do the same but wont realistically get to it until the end of summer. I'll need to sharpen up my building skills before I attempt it.
John

awesome job mike I am glad it all worked out with all your redesigning this is the reason why I look to you so much for advice on my electric planes you know so much and have taught me so much with airplane setups I guess the big thing is though with this hobby is you have to be willing to take the chance to see if someting is going to work or not that is the point I am at now I take a few chances and hope that things are going to work and most of the time they do by the way check out the home built foamie thread good news

Rick

by the way also flew my tiger moth yesterday with the 450 outrunner in it all I can say is awesome

Rick,
I noticed you're from Voise. I'll be there March 13 - 27th. Where do you guys fly around there? I could use a break from work occasionally and might need my "fix".
JOhn Dominick

da50ex

Thanks for the compliments, you may make me blush.
Yes I still have the four bladed prop on, I just thought it looked so nice and after all the trouble of inporting the True Turn spinner it seemed a wast not to use it, I may go back to the 2 blader later to see if I can increase the speed a bit.

Rick

"Its nice when a plan comes together" Experimentation is half the fun of this hobby, and passing on information is what we should all endevour to do, its no use having experience if you are not prepared to pass it on its wasted. Its a bit like youth its wasted on the yong.


BTW I stuffed my VMar Arrow Tiger last week-end doing something silly again, I'm thinking of starting a thread detailing the re-build, what do you think?

Mike

would be great mike I love new threads I am thinking about starting a new one on my b29 build

da50ex email me your email address at ([email protected] and I will give you my phone number and you can give me a call and I will give you all the information question will you be flying electrics or gas

Rick

Rick

Go for it, any informaion about the B29?

Mike

Mike,
I finally found your thread. I have seen several of the pictures on a couple other threads. There is a whole other world in here under other categories that I havn't looked into. Love the detailed build pictures. A "fix-it" thread would definately interest me. At the rate I crash I am always looking for new ideas on how to rebuild and strengthen things. Got any pictures of the Seagul PC-9 flying with gear up and gear down?

Adam

Hay Mike,
Nice build and modification to your model. I really like it when folks take the time to show their work like you did. Even though some of us that think we have a good handel on the hobby...some one comes along and shows us more.
Thanks,
Soft landings always,
Bobby of Maui

Adam

Waiting for the weather to inprove before I shoot the vidio, the trouble is I know my vidio and others don't so I'v also got to get on the field with another pilot that I trust to fly whilst I use the camara, hopefully this weekend.

Will strart the re-build thread as soon as I finish the YAK, hope to fly it this weekend also, I'm going to be a bussy little bee.

Bob

Thanks for your comments, and soft landings to you too.

Mike

Hi all

Anyone care to guess the speed of the PC9 with and without retracts extended, flying straight and level without a dive start?

Mike

Mike,
I don't know, with mine I would estimate maybe 65 -70 MPH with a Webra .61 and 12X6 prop. Gear extended of course, but then I've been out of the sport for a while so it's strictly a guess. Do you have figures?
John

da50ex

Yes I have figures over a timed course and through a speed gun, but I'm not posting the results until others join my silly game.

Mike

how fast mike by the way broke 100 mph yesterday with my new bird I guess the wind was right but the radar gun said 100 not once but twice not bad for an electric I broke down and bought a radar gun for myself now I just need to get a good video camera to catch some video but it may just be a blur anyway

Rick

Rick

I found that as monopod worked well with the vidio camera, its easier to use than a tripod and just as stable.

common chaps any more guesses on the speed of the PC9?

Mike

Rick,

You broke the 100 mph mark eh, congats! I am sure that it is very rewarding, particularly when you designed it, built it, and picked the power plant yourself. I would love to have a radar gun. If you don't mind me asking, what do those go for?

Mike,

My uneducated guess would be 90 mph. I am just going by scale size/speed ratio.

Adam

adam I am pretty happy this is about as fast as I can make this one because of the airframe but now I am looking at some other plans with built up fuselages instead of the profile to see what they are capable of doing I have my eye on a F14 that actually has a sweep control for the wings and also I am looking at a F18 either would be coll maybe I will build both as far as the radar gun I bought it from a local electronics place here for 150.00 but I have seen them on ebay before they are pretty neat I will do some more research and see if I can find one for you in your area

Rick

Well guys

It dosen't look as though we are going to get many quesses on the speed thing so:

Flat and level entry to a speed run 96mph flat out with retracts retracted.
Flat and level entry to a speed run 81mph flat out with undercarridge dangling.

Now that supprised me I did not expect the undercarridge to make that much difference to the parastitic drag of the airframe.

I also tried a dive into the speed course on the radar gun it was doing 120mph and I chickened out and did not complete the course, I am going to change the push rods to the elevator and rudder to closed loop and then try again.

Mike

So 90mph is right about in the middle. I would say that makes me the winner. What is my prize?

Adam

Cool. I knew these were pretty fast, not much frontal area. I've been more concerned about landing approaches and trying to slow it down. Our feild has a short approach path with big Pilatus eating trees at both ends (experience speaking here). Also, the Enya .60, just doesn't want to break in and run good inverted. I just pulled it and installed a spare Webra .61 I have and hope to try it this weekend. Can't wait to see your video.
John

Adam

Your prize is that if you ever come over to the Uk I will let you fly any plane in my fleet (on the buddy box) and of course the gratification that you were right.

da50ex

I'v put up flaps on some of my more difficult to land craft this dumps lift and increases the rate of decent, do it up high first to see the effect, then fine tune to suit, I have this set on a side slider to enable control of the rate of decent on approuch.

Mike

Mike,

My wife says I love being right, so I shall enjoy that part of my prize this evening as I work on finishing installing my AXI in the Supersporster. I hope to get to the UK someday. Good call on the buddy box , unless you want to measure the speed of your PC-9 with the help of gravity as I turn it into the lawn dart. I would guess 105 mph gear out speed, and 118 gear in.

Adam

Mike,
Yes I had been using flaps occasionnally, but we don't have a straight approach at our feild where I can set up a nice rate of decent You have to keep your altitude above the trees on base and then dive it in on short final. Or you can kind of make a gradual turn towards landing kind of like the old Hong Kong Int'l airport approach. I'm more of a 'dive, then flare' type though. I've gotten used to it and the grass runway now so I don't bother with flaps anymore. I did fly the PC9 in a stiff 10mph gusting 25mph cross wind today and was really happy the way it handled it. Thank goodness I had the engine finally running good.
John

da50ex

Have you tried the flaps going up not down, it dumps lift and increases the rate of decent, this looks like what you need.

Side slipping also increases the rate of decent, just need to ballance the ailerons against opposite rudder.

Have you tried either?

Mike

I would think that a major consideration would be weight transfer to the tail. Just putting a wheel back there isn't going to make the plane use it. You may find it nosing over on landing. With regards to servos, why retract the tail wheel?

Not at all surprising considering that drag increases as a square of speed, and parasitic or form drag of course being the major contributant to overall drag at higher speeds.

What did the finished project end up weighing Mike, dry AND wet? With the FS-70 and pneumatics on board plus the larger fuel tank she must be a heavyweight by now, particularly at take-off?

Where's the ZFW CofG now with all that weight up front? (ie: FS-70, retract mount and visible reinforcing) and what's the forward shift wet with that larger tank? Any tail-weight?

Curiosity begs the question, for as generous as the PC-9 wing is in aerofoil and area, the stock Seagull PC-9 fitted with a .typical silenced 46 two stroke sits at approximately the acceptable limit (2.7kg+/-½kg per unit) for a decent wing loading and power to weight ratio for solid aerobatic performance.