Jump to content
Please be aware of scammers when using the Sale/Wanted forum areas

David Ovenden

Members
 View Profile  See their activity

  • Posts

    1,073

  • Joined

  • Last visited

  • Days Won

    6

 Content Type 

Posts posted by David Ovenden

    Cleaning old 2 strokes - Where do I start?

    in IC Engines

    Posted · Edited by David Ovenden

    My experience with an ultrasonic cleaner using just water was disappointing. Nothing like Frank's engine experience.  Soaking engine in old/stale glow fuel and scrubbing with a toothbrush helps.  Cooking the parts in a slow cooker filled with anti-freeze liquid (outside in a well-ventilated garage with door open) got loads of baked on muck off. The engine was really very clean and almost like new afterwards.

    Black Horse FW190 retracts (70" version)

    in Scale Matters

    Posted

    The retracts supplied with this (somewhat long-in-the-tooth) kit are rather flimsy air units. Given the 75 degree retract angle what replacement electric retracts have people used? And/or what other (reasonably priced ) options are available? Has anyone successfully used the supplied BH pneumatic one for more than a few flights?

    For sure there are quite a few 90degree retracts  out there but there doesn't seem anything much at a reasonable price in 120 size with 75-80 retract angle. 

     

    BH FW190 pic.jpg

    Curtis Condor biplane twin

    in Building from Traditional Kits and Plans

    Posted

    It was last year's build and I'm running out of room ! There's a chipmunk, a Sea Fury and a 1/4 scale Tiger Moth waiting to be finished and a Bobcat Twin that I must finish drawing up ready to build over the winter. I need to find the space for them. The Condor was a project that was 3O years in the making. I am very happy I finished it, that all my design modifications worked, and that I successfully sorted the model out. Time to move on.

    • Like 2

    Spring is here again - who's been flying?

    in Flying Field Reports and Chat

    Posted

    2 hours ago, Eric Robson said:

    Second maiden flight this week, after a lot of right aileron it flew beautifully after 4 mins 60% left in batteries 4 4s 3600.  3rd flight at 50ft it went into a flat spin considerable damage but repairable. the only thing I changed was the throttle cut switch from D to A but when I went to fly it it was still on D, it checked out on the ground and took off as normal  till 50ft. on checking the TX it showed throttle cut on switch A. ?????

    IMG-20220324-WA0000[3069].jpg

    Really sorry to hear that Eric. What a shame after after 2 good flights. Glad to hear its repairable though. Good luck with the restoration project.

    • Like 1
    • Thanks 1

    Curtis Condor biplane twin

    in Building from Traditional Kits and Plans

    Posted · Edited by David Ovenden

    Well today was the day! I was able to test fly the Condor. It is definitely an improved model. After the flights the Tx trims were all still at "neutral".  Take-off was good and a landing was no problem either in spite of a fair breeze a bit off the axis of the runway.

    Looks like just one 3700mah Lipo will give 5 minutes of mixed flying which is not unreasonable. One could use a larger capacity lipo but it would need to be located further back in the fuselage to avoid the model being nose-heavy.

    It was definitely worth repairing the model and making the modifications which have very much improved the flying characteristics of the model. Losing the gyro and shedding 450g of weight together with tweaking the top wing incidence was a good move it seems!

    Thanks to Paul for getting some video of the flight.

     

     

    Condor test flight 1.jpg

    Condor test flight 2.jpg

    Condor test flight 6.jpg

    • Like 9

    Curtis Condor biplane twin

    in Building from Traditional Kits and Plans

    Posted · Edited by David Ovenden
    Spelling

    Rigging angles all checked and model weighed and balanced. Amazingly it now balances slightly nose down with only one lipo pack instead of two. So I managed to shed nearly 400g of weight and still have the model balance on the CG.

    I removed the servos from the tail and moved them to the nose;  removed some plywood mounts; changed the Robart wheels for foam ones; removed the gyro and got rid of some extension leads. And this has allowed me to use one 4s 3700 lipo pack I stead of two.

    The good news that most of the weight was lost from the extreme nose and tail of the model so hopefully that will also be beneficial. Will now have to see if the rebuild improves the flight characteristics  

    20220316_215703.jpg

    • Like 10

    Ordering from Aerobertics, Bruges

    in R/C Retailers / Distributors / Manufacturers

    Posted

    2 hours ago, Don Fry said:

    Adrian, you are right. Too much trouble.
    For me, other side of the Channel, I’ve had to learn how to make crumpets. Now I would point out, given the charge Mr Warburton makes for six of his, you have to be desperate to try. 

    Well, the small Carrefour supermarket near me (Gard) sells crumpets made in the UK but described on the packet as "crepes anglais". 

    • Haha 1
×
×
  • Create New...