Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Page 1 of 2 12 LastLast
Results 1 to 25 of 32

  1. #1

    Join Date
    May 2009
    Location
    Manassas VA
    Posts
    7
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    Engines for Hangar 9 Twin Otter

    I purchased a Hangar Twin Otter last year and I am finally at the stage of selecting power. I thought about getting the OS 35 AX's but the price is steep. I know that will probably be my best bet but they are a little steep in price for me. I have two 46 FX's that I was thinking about but I am not sure if they will be to heavy for the model. Does anyone have any suggestions? Any advice would be greatly appreciated.

  2. #2

    Join Date
    Mar 2002
    Location
    Madisonville, KY
    Posts
    287
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I have Saito .40's in mine. It flys very well and sounds great.

    Saito #254
    Life is too short to fly helicopters.

  3. #3

    Join Date
    May 2009
    Location
    Manassas VA
    Posts
    7
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I wonder if two Saito 56's would work well or if weight would be a big issue. I already have one 56 so this would be a good alternative to the O.S. 35's if I can make it work.

  4. #4
    Lifer's Avatar
    Join Date
    Aug 2008
    Location
    Kansas City, MO
    Posts
    2,769
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Thunder Tiger Pro .36's might be an affordable option. I have had good luck with these engines.
    AMA #77967/CD/LM

  5. #5

    Join Date
    May 2009
    Location
    Manassas VA
    Posts
    7
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I use two of the TT 40's for Pylon Racing and they both run really well. They seem very reliable and they are quite a bit chreaper than the O.S. 35's. Great suggestion.

  6. #6

    Join Date
    Sep 2002
    Location
    lemoore nas, CA
    Posts
    258
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I am putting os 70 4 strokes on mine.
    carl h stewart jr

  7. #7
    speedbrake's Avatar
    Join Date
    Jan 2006
    Location
    Fort Valley, GA
    Posts
    439
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Used two Saito 40 four strokes. Flies great.
    Keith
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Bz77411.jpg 
Views:	91 
Size:	92.9 KB 
ID:	1685191  
    Speedbrake

  8. #8

    Join Date
    Sep 2002
    Location
    lemoore nas, CA
    Posts
    258
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I ran into a snag with my twin otter. The os 70 four strokes wont fit without me cutting into the firewall to recess the engine back. I am trying to decide if i should do it or find some smaller 4 strokes.
    carl h stewart jr

  9. #9

    Join Date
    Mar 2006
    Location
    , GA
    Posts
    60
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I'm in the process of doing a makeover to the H9 Twotter. I am making a DHC6-100 instead of the -300. I did quite a bit of research on engines so hopefully you can benefit. Since I am recovering/glassing/painting, I was not confident the Saitos 40's would perform with the increased weight. The FA-40 appears to be the only 4 stroke engine that will fit without modification.

    Below is what I found. I elected to go with the Saito FA62A's since they are in the same case as the FA56, and I already own one of the required 2. I also extend the cowl instead of cutting into the firewall as I also increased tank size from the standard 8oz tank to 10oz. The line of the prop still appears to be in line with the fuse in a scale location. I'll post pics when I get some.

    Disclaimer.... the dims for the Magnum below is the best I could determine. Info for that engine is hard to find.



    Below is my target model









    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Eb86743.jpg 
Views:	22 
Size:	21.4 KB 
ID:	1698726  
    Keith Marks
    AMA 49064

  10. #10

    Join Date
    Dec 2008
    Location
    Pierre, SD
    Posts
    31
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Just installed 2 OS Max .46 AX's in mine.... have not flown it yet. Balance came out great (no weights needed). It's a tight fit.... but came out great. I kept the regular mufflers on it. Just tweaking out the controls right now. Used the mix function in my Futaba 8FG for the elevators (you will need to reverse one side & mix gear with elevator or buy a servo reversor). This will be my test bed for the Twin sync since the cowls are easy to get to. The reason I selected the OS 46's..... is I have had a history of solid performance with them.... a very stable and dependable engine.... with great power for this size bird. For a twin..... stable is good. The OS Max 55AX.... not so much. (great power for size.... but finicky).

  11. #11
    fledermaus's Avatar
    Join Date
    Oct 2003
    Location
    Winnipeg, MB, CANADA
    Posts
    322
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    The Evolution 36s that H9 "recommends" work just fine in my Twotter. They fit nicely, and the price is excellent. Plane flies in a very scale fashion using the 11x6 prop that H9 recommends (slightly "over propped" for the engine but it works much better than the 10x6 you might otherwise use).

  12. #12

    Join Date
    Jul 2002
    Location
    Fort Worth, TX
    Posts
    1,254

    RE: Engines for Hangar 9 Twin Otter

    I went with E-Flite Power 32s, 4s4000 lipos and 60 amp Detrum ESCs for my Twotter.... Total power system cost including batteries was $270. (motors were $70, ESCs were $20 and the lipo was $45, per side.

    Hard to beat electric power for the H9 Twin Otter....no cylinder head or muffler cutouts, improved reliability and they give a very nice simulation of scale turbine power!

    I got mine together over the Christmas break and maidened it on 12/30/11. A really great flying model!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Vt56749.jpg 
Views:	53 
Size:	67.4 KB 
ID:	1708806   Click image for larger version. 

Name:	Up48416.jpg 
Views:	25 
Size:	84.3 KB 
ID:	1708807   Click image for larger version. 

Name:	Hm23134.jpg 
Views:	30 
Size:	235.5 KB 
ID:	1708808   Click image for larger version. 

Name:	Un33634.jpg 
Views:	30 
Size:	110.6 KB 
ID:	1708809  
    Electric Coolhunter

  13. #13
    SIMCO's Avatar
    Join Date
    May 2003
    Location
    N.Richland Hills, TX
    Posts
    398

    RE: Engines for Hangar 9 Twin Otter

    Love the last picture on final. Looks like Woody is dressed for the Artic!!!

  14. #14

    Join Date
    Apr 2005
    Location
    Nanaimo,B.C., BC, CANADA
    Posts
    7
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    About how many minutes you can fly with this setting ?

  15. #15

    Join Date
    Mar 2006
    Location
    , GA
    Posts
    60
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Hey guys......below is a link to my second outing with the Otter. GREAT flying plane. Could not be happier.


    http://youtu.be/kdffK5v5fJM
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Ay75156.jpg 
Views:	104 
Size:	156.3 KB 
ID:	1748072   Click image for larger version. 

Name:	Fd91687.jpg 
Views:	47 
Size:	95.3 KB 
ID:	1748073  
    Keith Marks
    AMA 49064

  16. #16

    Join Date
    Feb 2012
    Location
    Musselkanaal, NETHERLANDS
    Posts
    32
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Hey Keith,

    You have saito .62 engines on board....do the fit in?...and the exhaust ? Please, a few close up foto's. :-)
    Or did you have to rebuild the plane?


    Kor

  17. #17

    Join Date
    Mar 2006
    Location
    , GA
    Posts
    60
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Below are a few photos.

    I had to rework the nacelles to get the 62's to fit. I extended the cowls appx 1/2" by adding blocks to the existing firewall and then filled in recessed space that the nacelles originally mounted to with 1/32 ply and filler. In addition, I removed the tank floor of each nacelle and made a new one appx 3/4" lower to achieve the correct center-line relationship of the tank to the carb. I used a combination of maple, basswood and light 1/4" plywood to reinforce the construction after cutting out the floor.

    I bumped the tanks from 8oz to 10oz and I'm glad I did. My last flight was 8.5 minutes and I used appx 5oz of fuel. With regard to the exhaust, I used a 90 degree adapter (tapped for pressure) with a straight pipe out the bottom of the nacelle. Unfortunately it doesn't sound like a turbine.....more like a hot rod!

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Jh16639.jpg 
Views:	33 
Size:	244.3 KB 
ID:	1748350   Click image for larger version. 

Name:	Up47829.jpg 
Views:	40 
Size:	238.8 KB 
ID:	1748351   Click image for larger version. 

Name:	Mr42346.jpg 
Views:	28 
Size:	362.1 KB 
ID:	1748352   Click image for larger version. 

Name:	Rk24275.jpg 
Views:	38 
Size:	188.9 KB 
ID:	1748353   Click image for larger version. 

Name:	Oa31913.jpg 
Views:	39 
Size:	274.0 KB 
ID:	1748354  

    Keith Marks
    AMA 49064

  18. #18

    Join Date
    Feb 2012
    Location
    Musselkanaal, NETHERLANDS
    Posts
    32
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Hi Keith,

    Great looking plane...and those army colors are awsome....
    Mabay are a couple of turbo header mufflers the solution for your sound problem ? (http://www.rcspecialties.net/ )

    What do you think...are those muffles fit insite the cowls ?

    Greatings,

    Kor


  19. #19

    Join Date
    Mar 2006
    Location
    , GA
    Posts
    60
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Those mufflers may be a good solution. I'll look into it. After so much building over the winter, I think I'm going to enjoy this bird a little before I make any changes.

    With regard to the finish, it is actually modeled after the Norwegian Special Forces aircraft used from 1967-2001! The plane later got around some and unfortunately met it's demise not far from where I live here in Georgia, US. I found that out after I was well into the project. Good thing I am not superstitious.
    http://www.719skvadron.no/dhc6/dhc6-news.htm


    If you're thinking about going with 4 stroke glow, I'd seriously look at the OS FS56 or better yet, the YS FZ70-S. Both have a smaller footprint than the Saitos and deliver more power. The YS has a crazy amount of HP. I went with the Saitos because I already had one of the required two and did not want to incur the added cost.

    Keith
    Keith Marks
    AMA 49064

  20. #20

    Join Date
    Feb 2012
    Location
    Musselkanaal, NETHERLANDS
    Posts
    32
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I have those saito's already in my possession :-)....one is in use already...the other one is new.
    The intention was that they come in the Marutaka Cessna 337 Skymaster.... but I have to finish this plane...and thats gonna take a while.
    Thats why I am looking for a RTF twin plane where I can use those engines...and this twin Otter looks great.

    I think I am gonna order one.....I see in your pics that the engine fits with some modifications....the mufflers....whell...perhaps the original saito's or also those turbo mufflers...if they are not too noisy.

    Kor

  21. #21

    Join Date
    Mar 2006
    Location
    , GA
    Posts
    60
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    See attached for the modifications I did to accommodate the Saito 62's. Your experience may vary.

    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Db84197.jpg 
Views:	63 
Size:	84.6 KB 
ID:	1748901  
    Keith Marks
    AMA 49064

  22. #22

    Join Date
    Jun 2008
    Location
    Barrie, ON, CANADA
    Posts
    10
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    Hello all, I took my otter to the feild yesterday and had trouble synching the engines. One was running faster than the otther, I dicsonneceted the throttel servo pushrod to get it to run in sequnce with the other engine, but I still couldnt get them close enough. When I taxied the runway, I had to keep constant rudder to track straight.

    I am considerign buying a servo synchronizer, I dont have anotehr channel on my radio to program.

    So, couple questions, how close in RPM's do you get, or do you do it by ear, and do you think the synchronizer is a solid solution?

    This is my first twin, so trying to learn as |I go along.

    have a great day, thanks,

    Joe

  23. #23

    Join Date
    Jan 2002
    Location
    Ivyland, PA
    Posts
    2,098

    RE: Engines for Hangar 9 Twin Otter

    My experience (with 2-stroke twins) is that you should adjust the linkages so that the throttles track mechanically as closely as possible. When you get to the field you run each engine independently and tune the high and low needles the normal way. And then fly.

    No attempt should be made to adjust the needles so that the engines run at the same rpm. That is a recipe for having an engine quit in flight, which can be ugly. And by the way, for someone new to twins, I recommend that if you lose an engine in flight you immediately throttle down the other engine and perform a dead stick landing like on a single engine model.

    You may need to run your newer Saito more before marrying it with the older Saito. Maybe for several gallons of fuel so that it is fully broken in.
    Glow Head #6, UltraSport #70

  24. #24

    Join Date
    Jan 2002
    Location
    Ivyland, PA
    Posts
    2,098

    RE: Engines for Hangar 9 Twin Otter

    I'll add another comment... I find that I do need to sometimes use a lot of rudder on takeoff. I think it is because one engine is not coming up to power as quickly as the other. But having to use a lot of rudder is also a clue that one engine may be having a problem.
    Glow Head #6, UltraSport #70

  25. #25

    Join Date
    Mar 2006
    Location
    , GA
    Posts
    60
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Engines for Hangar 9 Twin Otter

    I went with a Twin-sync setup on mine. LOVE IT and the installation was pretty straight forward. The biggest issue is getting the servo end points set up correctly so you get maximum sensitivity from the unit. I elected to put the sensor magnets in the spinner hubs. I am quite pleased with the operation and the engines are within 100-200 rpm of each other. One other HUGE advantage is that if you have an engine out, the active engine immediately goes to idle. Already saved my bacon on a touch and go.

    http://www.troybuiltmodels.com/items/WRCTWINSYNC.html
    Keith Marks
    AMA 49064


Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 10:32 PM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.