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Search: Posts Made By: nexxa
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10-05-2010, 08:46 AM
Replies: 11
Views: 2,306
Posted By nexxa

RE: 137 MPH Scrath built Bi-Motor Racer

Some updates...

Finally got these engines synched together. I dismount both engines and changed seals and gaskets. Put everything back together. There was an air leak somewhere.
Max RPM on 15%...
09-20-2010, 10:22 AM
Replies: 11
Views: 2,306
Posted By nexxa

RE: 137 MPH Scrath built Bi-Motor Racer

Thanks for comment.

No, I never tried bubble-less tank. I will buy and install them this winter. Will definitively fix the problem

My foaming problem comes from my tank installation. With...
09-20-2010, 09:11 AM
Replies: 11
Views: 2,306
Posted By nexxa

RE: 137 MPH Scrath built Bi-Motor Racer

Thanks.

Need to work on the finishing this winter (if its survived until there!).

Need to work on these engines too. I suspect air leak form carb... Needle settings are too different from...
09-16-2010, 10:18 AM
Replies: 11
Views: 2,306
Posted By nexxa

137 MPH Scrath built Bi-Motor Racer

A long time ago (about a year) I pickup my old Great Planes Viper 500 who needs a new covering (5 years of hard life). The fuselage was good for garbage, too many repairs and reinforcement to do. So...
02-23-2010, 10:28 AM
Replies: 5
Views: 1,170
Posted By nexxa

9lbs thrust, is it enough?

Hi, from a newbie in duct fan.
With standard prop planes, i usually power/prop them to have more thrust visit weight.
Exemple: 5lbs racer plane, with ±7lbs thrust and prop pitch of 8 or 9 =...
02-22-2010, 03:32 PM
Replies: 19
Views: 2,182
Posted By nexxa

RE: Sundowner 50 with OS.91FX tune

the last one... take off in august...
As you can see, there is no prop clearance!
02-22-2010, 03:22 PM
Replies: 19
Views: 2,182
Posted By nexxa

02-22-2010, 03:20 PM
Replies: 19
Views: 2,182
Posted By nexxa

RE: Sundowner 50 with OS.91FX tune

Some pictures...

I seal all surface with ultracote and add these carbon rod to stiffed the elevator. Works great and fix my high speed flutter problem (only when i was pulling the elevator out...
02-22-2010, 03:11 PM
Replies: 19
Views: 2,182
Posted By nexxa

RE: Sundowner 50 with OS.91FX tune

Oupsss!!! I forgot to finish what I started!

Sorry guys. :(
(Sorry for my English too!)
I finally finish this project by April. I flew it many times this summer. It comes out at ± 7.5 lbs...
12-04-2009, 12:16 PM
Replies: 42
Views: 8,854
Posted By nexxa

RE: EDF reversing for air brakes

A simple version

Important, use a wood, fiberglass or plastic arm to transfer the power. Each side of the arm as different power from ESC.
12-04-2009, 11:51 AM
Replies: 42
Views: 8,854
Posted By nexxa

RE: EDF reversing for air brakes

Here a simple build to make a reverse with a standard ESC. Need a extra servos and channel. The drawing only shows the logic.
Instead of using plastic servos arm to redirect the power, cut an arm...
11-19-2009, 11:37 AM
Replies: 23
Views: 4,389
Posted By nexxa

RE: Need speed proppeller,Patriot,O.S.95AX

I don`t remember the exact RPM I was getting with my OS.91FX on a Ultratrust muffler, but it was between 13 000 and 13 500 on ground with a APC 12X8 and APC 11X10. It was unloading a lot in the air....
11-04-2009, 11:52 AM
Replies: 8
Views: 2,291
Posted By nexxa

RE: NEU Motor trouble

Why?
Because, I don’t want to lose more time to finish this project. Shipping cost, shipping delay… repair, explanation…etc… It’s less frustrating making my own repair than wait for 2 or...
11-02-2009, 02:50 PM
Replies: 8
Views: 2,291
Posted By nexxa

RE: NEU Motor trouble

Thanks for the info.

I will sent an email to Neu customer support today.
But, I put some Red Locktite on the front plate and I reassembled the motor. I let it dry for a night and it was...
10-27-2009, 09:57 AM
Replies: 6
Views: 1,825
Posted By nexxa

RE: Heat sink for 45mm inrunner

Mistake, it will fit but it will need modification.

Maybe you will need to cut it in half, because the KB45 is 3mm bigger in diameter.
10-27-2009, 09:14 AM
Replies: 6
Views: 1,825
Posted By nexxa

RE: Heat sink for 45mm inrunner

(my English is poor, excuse me)

Hi,
No matter what you do to keep this engine cool it will get hot, very hot and it will smell and smoke in less than 5 minutes at 1500 watts... I personally...
10-26-2009, 02:04 PM
Replies: 8
Views: 2,291
Posted By nexxa

NEU Motor trouble

I recently buy a Neu motor 1521/2Y.

I made some test this weekend and the rear part of the engine (the entire motor) unscrew while running (imagine all the mess). The front plate of the Neu...
09-10-2009, 09:24 AM
Replies: 5
Views: 877
Posted By nexxa

RE: Ducted Fan suggestion

Thanks for advices. Yes a lot of cooling is needed...
Cheap stuff need more attention before using it! ;)

I dont think I will do 150mph with this one, but 110 to 125 mph will be more...
09-10-2009, 07:54 AM
Replies: 5
Views: 877
Posted By nexxa

RE: Ducted Fan suggestion

Thanks for info.
After a lot of reading, that what I saw... Its cost alot for high performance like BVM Jet!

I think I will start cheaper and see if I like EDF....

This is what I ordered...
08-31-2009, 01:39 PM
Replies: 5
Views: 877
Posted By nexxa

Ducted Fan suggestion

Hi, I’m new to this sub-forum (habitually in Prop speed planes)!
I order a ARF ducted fan jet form nitro models. It needs a 90-100mm fan. Do you have suggestion for fan and motor? I like...
Forum: RC Jets
08-28-2009, 01:34 PM
Replies: 2
Views: 832
Posted By nexxa

Nitro Ducted Fan

Hi, I’m new on this forum (RC Jet), habitually I go to Extreme Speed Prop Planes sub-forum but I need more speed now! I don’t find a lot of info on ducted fan for nitro engine. I want to build a...
08-12-2009, 02:49 PM
Replies: 34
Views: 5,307
Posted By nexxa

RE: Twin engine speed planes

Im presently working on a GP Viper 500 twin.
2 x OS.55AX tune muffler, APC 9X10, 6 oz tank. It's already fast with one engine (alot faster on .55AX compare to a .46FX)

All mods, engine,...
04-22-2009, 08:21 AM
Replies: 3
Views: 531
Posted By nexxa

RE: Cutting a propeller

Thanks for the answer. Ok square at tip.

I will tach my original APC 10X9 firts and reduce the diameter by 1/4" at the time. I want something like 14 000 - 14 500 on ground. If finally the...
04-21-2009, 08:31 AM
Replies: 3
Views: 531
Posted By nexxa

Cutting a propeller

I carve my prop as needed from a long time.
But I still have this question. For example, I use an APC 10X9 on my OS.55AX with ultratrusth muffler (Viper 500). I want to try a 9.5X9. Do I simply...
03-18-2009, 11:03 AM
Replies: 1
Views: 461
Posted By nexxa

Webra engine?

Do somebody have tried or know this engine. It have a weird caburator.
Somebody at club wants to sell me that engine for 80$. It's used, but looks good. No loose part, no rust inside or corrosion....
Showing results 1 to 25 of 165
 


 
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