Freewing A-4 Blue Angels Conversion

[RCjetdude]

Thanks for the kind words Ron.

I have been working on the gear doors for one of the mains all day and I think I finally got it sorted out. This is a major project milestone as far as I am concerned. Now I just need to duplicate it on the other side. My lights will be here Monday so once I get all the mechanical and electrical installations sorted out I can then move on to finishing. Here is another video of the main gear cycling with the gear doors.

https://youtu.be/ACDbt26gBNU

[Ron1950]

thanks your a artist my friend

[RCjetdude]

How did you get the tailhook to work? I have one on a t28 but never did figure how to get a servo in there

The A-4 has this nifty empty space in the fan cover where you can mount the servo just opposite the hinge for the hook.

[Ron1950]

How did you get the tailhook to work? I have one on a t28 but never did figure how to get a servo in there

[RCjetdude]

Looks awesome. I'm not sure how the real version works, but will the gear doors close when the gear is down, or do they stay flapped open? Heck of a project! :pop

They stay open. This is turning out to be quite the challenge but I am getting it. Challenges are a good thing. They extend our abilities. Theres a new word, extendabilities.

[purduephigam]

Looks awesome. I'm not sure how the real version works, but will the gear doors close when the gear is down, or do they stay flapped open? Heck of a project! :pop

[RCjetdude]

Back on the main gear doors. My 9g servos and GT Power Sequencing module arrived yesterday and I spent most of last night trying to figure out different ways I could make this work. In the end I think I am going to have to go with 4 servos. I hooked everything up to see how it would all operate together. I needed to determine servo travel and where the two reverse servos needed to go. Here is another quick video showing the operation of the gear and door servos as layed out. Pushrods will come off the bottom of the servos. That is the plan for now.

https://youtu.be/pggD8_3EeGo

[RCjetdude]

It looks great Steve, the arrester hook is a cool addition, is that going to give you a problem with the angle of attack while landing, or are you going to have it on a separate switch to deploy when you want, rather than with the L/G?

Grossman56

Thanks Dan. Separate switch. It's just for show on slow passes. I forgot to add a picture of it.

[Grossman56]

It looks great Steve, the arrester hook is a cool addition, is that going to give you a problem with the angle of attack while landing, or are you going to have it on a separate switch to deploy when you want, rather than with the L/G?

Grossman56

[RCjetdude]

Well, it looks like the lights might be on their way soon after all as I just got a back in stock notification. I should be getting a shipping notice soon. Woohoo!

[RCjetdude]

Thanks Pat. Right now I am waiting on servos and a sequencing module to hopefully get the main gear doors to work properly. If I can accomplish that then it will be down to lights which are still on backorder and have been for awhile now. If they don't arrive by the time I need them then I will shelve it until they do and work on other projects until then. I would really like to get a coat of paint on this bird.

[crxmanpat]

That looks awesome man!

[RCjetdude]

I am satisfied with the operation of the arresting hook. I did redo the hinge for it to look a little more realistic. Here is a quick vid showing it's operation.

https://youtu.be/84d0HavhqmA

[RCjetdude]

Hey Tom, I had some hinges like those and just couldn't get it to work right. Dan, I thought of the Bearcat doors as well and how they work, again the geometry was just not right. Given more time and a greater determination I could maybe work it out but I am ready to get on with painting. Servos won't add much weight or complexity but will get me going forward again. I really appreciate the ideas.

I have been checking out some threads on RCG about the Berkut but will look into the one you pointed out Tom. Thanks for the information. I hope it flies as good as it looks.

[Grossman56]

Guess there's no way that they would work using pins like on the Bearcat inner gear doors is there?

Grossman56

[Pogo]

Thanks Dan. Not amazing enough to keep monkeying around with trying to get the main doors to open without servos. I am wanting to move on to finishing and painting so I am throwing in the towel, waiving the white flag and will work the mains doors with servos. I will try to make them work with just one for each set of doors to start. I ordered some 9g servos and a gear door sequencer so I will have more to post soon. Not to get side-tracked but I traded with George and got this from him.



He has already installed better fans, ESC's, retracts and servos. I am going to quickly install a receiver and get it set up to hopefully fly at a Halloween Fun Fly this Saturday. Heck with the TV and the drag shute. Should be interesting.

Steve, I don't know if you're aware of these spring hinges, available here:

http://www.sonictronics.com/xcart/product.php?productid=16476&cat=321&page=1

Might save you the weight and complexity of servos. :Cool:
Also, speaking of LX SU47's, my friend Eric (4stripes on RCG) did an extensive build and flying thread of his on RCCanada you might want to check out:

http://www.rccanada.ca/rccforum/showthread.php?t=380866

Tom

[RCjetdude]

He likes the trade aspect of this hobby. Where'd he get that Stuka. ;)

Yeah I know! Probably why he has a hangar full of planes and I don't....yet.

[OV10]

Not to get side-tracked but I traded with George and got this from him.

He likes the trade aspect of this hobby. Where'd he get that Stuka. ;)

[Boots Whirlygig]

The SU-47?!?? Just in time for Halloween! That’s one scary looking machine! Better open a new thread, we’ll all want to know more!

[RCjetdude]

Thanks Dan. Not amazing enough to keep monkeying around with trying to get the main doors to open without servos. I am wanting to move on to finishing and painting so I am throwing in the towel, waiving the white flag and will work the mains doors with servos. I will try to make them work with just one for each set of doors to start. I ordered some 9g servos and a gear door sequencer so I will have more to post soon. Not to get side-tracked but I traded with George and got this from him.



He has already installed better fans, ESC's, retracts and servos. I am going to quickly install a receiver and get it set up to hopefully fly at a Halloween Fun Fly this Saturday. Heck with the TV and the drag shute. Should be interesting.