tiger650

My Feedback: (22)

Thanks!

devens

Bob,

That is brilliant on the mounting of the axel! I bought a 3/6" wheel collar...duhh. I guess I should have looked at the directions!

RC-CAKES

My Feedback: (4)

No problem... Just more scale looking! I didn't like the shiny screw tips visible in the hub.

-J

RC-CAKES

My Feedback: (4)

Question for the SA-125 and FS-120 guys... I have been reading the previous posts about excessive engine vibrations- especially the Saitos. How bad is it? Have you used any dampening measures such as different mounts or rubber bushings? Any luck?
Guys using the OS engines - are you having vib issues as well?

I read where some guys servos are failing over short time or the cowling doesn't hold up. I wonder if it could be some prop balance issues as well. I know I was at the LHS recently looking at different 16" props. All but one were way off balance right out of the bag.

Thanks for your thoughts.

sdool

Great job on the retracts guy's. I just ordered the spring air and wheels so my job will me much easier.

Thanks
Steve

Upward

My Feedback: (1)

Good effort on getting these retracts to mount right. I dont think I put as much time as some of you guys, however they will work just fine.
I was wondering what kind of scale wheels that you guys are using, who is the manufacturer of them.
Here is a few pictures from last night, I just got around to starting that OS .91FX for the first time. Its really loud with that J'tec muffler, Kind of sounds like a snowmobine.
Its a good thing that my local club dosent have any noise restrictions. This engine is really a beast....

devens

The wheels are Robart Scale Wheels. 3.25" Nice looking bird there. If you are interested in an totaly in-cowl muffler , J-Tec is custom making one for me. $90 It is supposed to ship today. I will post pics when I get it and make sure that it is right. You can contact Al at J-Tec http://www.jtecrc.com/ and tell him you want a muffler like he built for Daren Evens.

Titan176

Hey all, just a couple of questions regarding engine selection. (I hope to use a 2-stroke)

-I currently own a SuperTigre .90...never used...I've heard they can be tempermental. Is it worth installing or should I upgrade to the OS .91?

-Also regarding the Supertiger .90.....Any muffler ideas? The stock one is rediculous in size, i purchassed a bisson pitts style but it wont clear the engine mount and doesn't fit flush with the mount installed...any suggestions?

-I fly from grass the majority of the time, will the Century Jet retracts stand up to the job, with regards to reliability/strength?

Thanks in advance...[8D]

joey_snaproll

My Feedback: (32)

HI Titan 176,
I have 2 ST 90 G ,both with side mounted bisson pitts mufflers , I just ground the part on the muffler till the dubro iso mounts sat flat. The one in my TF corsair is running great . and the other one was in a Su-29 68" that I plowed in ,and the engine still ran great .Just take the time to set it up. OS is OS, good engines just a little more pricey. I have no complaints about my ST 90's ,but they are the older Italian ones ,not the new china ones. the extra one is going in the back of my Al masters Do-335 when I build it.

good luck with the build and engine

Joe

Titan176

Thanks man, appreciate it.....Which mount did you use?

RC-CAKES

My Feedback: (4)

Hey all. Has anyone installed a larger fuel tank? I saw where Maui Bobby lowered the mounting... but I am curious if anyone as used a larger one? If so, which brand/size?

Those who fly the 120-125 engines - how long of a flight is typical?

Thanks !

Titan176

Just wanted to post for anyone in the same boat I was. I had a pair of older pneumatic robart retracts that i bought robostruts for....needless to say a pain to put together....I never test flew it, but for the price/effort involved i was disappointed. I took a chance and dished out for the CJM Retracts. Got them in the mail today and installed them...Well worth the money, they fit and work beautifully plus minimal assembly. Now waiting to test fly them on grass, once the iceberg that is Canada thaws out. If anyone has test flown the CJM's on grass let me know thanks.

Ompa

Hi Titan176.

I have earlier built the Top Flite P51D as a Gold Edition kit, for about 7years ago. For that model I used CJM Retracts and always flow from a grass field and did not experienced any problems.
When I got my Robart #605HD with struts for about a month ago, I almost regretted that I didn’t bought the CJM retracts instead [:@]

tiger650

My Feedback: (22)

devens,

What did you use to angle down the mounting rail. The only thing that I can think of using is a cutoff wheel, although maybe a router would work? I should have considered a doubler, but before I determined the need to grind down the rail I epoxied fiberglass cloth all over the inside...oh well.

Thanks,
bob

Upward

My Feedback: (1)

I used a dremel with small tip attachments. It worked pretty good. I realy dont know the anngle, I just kept trial fitting then untill I was happy with the results.
I have had no issues installing the robo struts, didn't even have to cut them.

devens

I used a cutoff wheel.

tiger650

My Feedback: (22)

Upward,
Did you use the 608HD retracts with your robostruts? I must have screwed up. I am using the 608HD retracts with robostruts and I had to cut my strut down almost to the point where I would have cut the adaptor bushing. Your input would be appreciated.

CorsairJock

My Feedback: (90)

I believe Upward is using 510RS 'RoboStrut Ready' retracts, which has the RoboStruts inserted into the trunions, thereby eliminating the need to shorten them.

Upward

My Feedback: (1)

^^^ You got it, Im using the Robart 510RS 90 Degree Mains that are robostrut ready....

One question though, should I install that bushing that the robostruts came with (fits into the top end of tube to adapt to wire struts) Just so it has a little more support when it attaches to the retracts.

tiger650

My Feedback: (22)

Thanks for the clarification CorsairJock!
Bob

Titan176

Thanks for the advice....I cant wait to test it out!

Sonicman

To those that have installed Robart mechanical retracts, how did you connect the retract wire to the operating pushrod on the retract housing? Did you use a nylon horn and z-bend similar to the stock retracts or something else? The Robart instructions appear to call for a 2-56 threaded coupler, but not much other detail. Sorry if this is a no brainer, but this is my first retract installation so just want to make sure I'm clear. Thanks!

jstanton

My Feedback: (14)

Sonicman,

I used a 2/56 thread rod at one enf the screwed in the Robart retract. I than ran the rod through the plastic tube up and into the servo area. I bent the rod so it a lined with the servo arm. I used EZ connectors on the servo arm and ran the 2/56 rod through them. I used the metal permenate support rings on the EZ connectors I hope this helps. I hope to give them their maiden trial this weekend.

Sonicman

Thanks Jim for the reply and good luck with the maiden. Sounds like just using a 2-56 threaded rod is the way to go.

Hope to maiden my stang soon after finishing the retracts, cutting the cowl, and breaking in the Saito. Thanks to everyone who's contributed to this forum. The info has been invaluable in helping with my build.

Cheers,
Mike

RC-CAKES

My Feedback: (4)

Any thoughts? :

Question for the SA-125 and FS-120 guys... I have been reading the previous posts about excessive engine vibrations- especially the Saitos. How bad is it? Have you used any dampening measures such as different mounts or rubber bushings? Any luck?
Guys using the OS engines - are you having vib issues as well?

I read where some guys servos are failing over short time or the cowling doesn't hold up. I wonder if it could be some prop balance issues as well. I know I was at the LHS recently looking at different 16" props. All but one were way off balance right out of the bag.

Thanks for your thoughts.