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Search: Posts Made By: esamart
Showing results 1 to 25 of 102
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Forum: Composites Fabrication And Repair
12-17-2008, 12:54 AM
Replies: 33
Views: 18,105
Posted By esamart

RE: epoxy or polyester resin

Hi fazeel

Your questions reveals you already know more than most of us will ever need to learn :)
Forum: RC Pattern Flying
07-17-2008, 09:33 AM
Replies: 260
Views: 45,535
Posted By esamart

RE: zdz40FAI

Really nice mount Magne and exellent idea how you managed to have nose ring. Notches for crank-case webs look narrow so I assume engine does not rotate too much when running.

About vibration....
Forum: RC Pattern Flying
07-17-2008, 09:09 AM
Replies: 260
Views: 45,535
Posted By esamart

RE: zdz40FAI

I wish Ýou luck but recommend you get ignition timing light. I have seen them sold less than $20. With it you can verify that advance ingreases with RPM and tune ignition as well. Soft mount might...
Forum: Glow Engines
06-26-2008, 01:01 PM
Replies: 15
Views: 1,554
Posted By esamart

RE: IRVINE ENGINES ?

Yes they did have England made batch which were about £15 more. I have one of those Special black 53s with true Irvine carb and remote needle kit which can be monted to the carb as well. It also...
Forum: Gas Engines
01-21-2008, 01:47 PM
Replies: 21
Views: 2,176
Posted By esamart

RE: Smaller prop for G62

Attachments
Click for fullsize

This Top Flite prop in the middle additional holes are drilled to wrong positions and makes it prone to break.

Edit: did not attach but the one on post...
Forum: RC Pattern Flying
01-10-2008, 05:43 AM
Replies: 28
Views: 7,791
Posted By esamart

RE: Pull pull setup for elevators

In theory no, it does not change much. If I recall right *t is pythacoras function (and up to cotangent trigonometric functions) which to use if you want to calculate how little it makes diffetence...
Forum: RC Pattern Flying
01-07-2008, 10:26 AM
Replies: 12
Views: 2,120
Posted By esamart

RE: What does the nose ring do?

With soft mount we soften the force impact which engine generates when fuel burns during work-cycle. This (torque) force is against propeller load so it twists engine and all which is attached to it....
Forum: Electric Pattern Aircraft
12-02-2007, 11:58 AM
Replies: 6
Views: 1,203
Posted By esamart

RE: What is Balancing?

For me balancing is a bit more. I measure voltages of every cell after flight to verify if any has depleted lower. Voltages rise fast but sometimes I can see difference and I charge that cell more...
Forum: RC Pattern Flying
11-22-2007, 12:30 PM
Replies: 26
Views: 5,883
Posted By esamart

RE: DA50 in a pattern plane?

Although ZDZ 40 F3A might have enough power for FAI F3A it wont easily pass sound limit. Magne, please run yours side to side test with YS Dingo etc. I believe hard mounted bench test would give...
Forum: RC Pattern Flying
11-01-2007, 03:06 PM
Replies: 6
Views: 1,280
Posted By esamart

RE: Re: Remote Mixture Control

Similar pushrod and servo system as is used with throttle operates just fine. Put short piece of fuel tube to the mixture needle. Drill hole (about 1/4'') to servo arm. Hole size should be slightly...
Forum: RC Pattern Flying
10-12-2007, 09:05 AM
Replies: 78
Views: 34,487
Posted By esamart

RE: ZDZ 40 RE F3A Soft Mount

Nose ring does not have to be a circle. 270 decrees might be enough. Perhaps it is possible to build smaller mount for a censor to fit missing 90 decree space.
Forum: Composites Fabrication And Repair
09-30-2007, 12:43 PM
Replies: 9
Views: 1,594
Posted By esamart

RE: Want to built airfoil tail insted of flat

You have to make a drilling jig next to foam cores. Two plywood pieces few inches apart which have holes for thin wall metal tube. You have to file the tube sharp so you remove material inside and...
Forum: RC Pattern Flying
09-23-2007, 12:23 PM
Replies: 9
Views: 1,614
Posted By esamart

RE: Anhedral stab setup

Surface mounted pointers should work fine and give more accuracy than sticks etc.

I wrote vertically but I saw in my mind nose down. For experiment perhaps a chair is sufficient mount for a...
Forum: RC Pattern Flying
09-20-2007, 04:43 AM
Replies: 9
Views: 1,614
Posted By esamart

RE: Anhedral stab setup

I have an idea using two laser pointers, beamers etc. and small mirrors mounted temporarily to the control surfaces. Mounting model vertically next to a wall few feets off so you can use tape...
Forum: RC Pattern Flying
09-03-2007, 11:47 AM
Replies: 9
Views: 1,693
Posted By esamart

RE: DIY CF pipe info

I don't remember the weight. Carbon sock was guite heavy tow filament and meant for mechanical structures I think. I used it because I had it. There were open spaces on many "corners" and thats where...
Forum: RC Pattern Flying
09-02-2007, 08:49 AM
Replies: 9
Views: 1,693
Posted By esamart

RE: DIY CF pipe info

I made carbon pipe with three aluminum baffles and small diameter tube which also kept them in shape during building. I used a cardboard tube as a mold which was then filled with candle wax. I carved...
Forum: Glow Engines
05-14-2007, 01:24 PM
Replies: 12
Views: 1,781
Posted By esamart

RE: YS 61R-- adjusting the carb

Most likely it passes the pipe resonance with that toothpick ;) Smallest propeller I had on my YS61 was 12x12. Perhaps I don't remember right but pipe lenght's from plug to the baffle were around 26...
Forum: Electric Pattern Aircraft
04-30-2007, 06:22 AM
Replies: 31
Views: 5,789
Posted By esamart

RE: Website Update - New F3A packs

Interesting that voltage fluctuation at min/max current at the start of flight is larger than at end of flight. Is it because of temperature rice of the LiPo cells which improves internal resistane?...
Forum: Glow Engines
04-29-2007, 05:52 AM
Replies: 11
Views: 3,602
Posted By esamart

RE: Current draw from glo plug?

I think glow plug wear is ingreased if you have battery connected all the time. Platinium coil resistance will ingrease when it heats up, either by current or catalystic reaction of methanol. So...
Forum: Composites Fabrication And Repair
04-25-2007, 06:52 AM
Replies: 32
Views: 14,457
Posted By esamart

RE: Boat mold and hull

Your plaster covered plug will absorb a lot of low viscosity epoxy and when cured you can sand it smoother. But perhaps for good result you should paint it with sandable primer until good for...
Forum: 3D Flying!
04-24-2007, 07:54 AM
Replies: 86
Views: 8,184
Posted By esamart

RE: Reactor landing gear setups

I have not started assembly yet so I am gonna build new LG mounting bit forward.
Forum: Glow Engines
04-24-2007, 07:49 AM
Replies: 15
Views: 1,909
Posted By esamart

RE: ys two stroke problems

Ken!

If it was okay after your repair you should check diaphram unit casket. Small holes used to be too small and had some offset also and in use the edges frayed and blocked fuel flow. Fraying...
Forum: Glow Engines
04-24-2007, 07:36 AM
Replies: 13
Views: 2,525
Posted By esamart

RE: OS Holds Wankel Patent?

British Norton motorcycle had short and clorious period with Wankel in racing. Their engine was also used in some UAV's in 80s.

http://en.wikipedia.org/wiki/Norton_(motorcycle)
Forum: RC Pattern Flying
04-14-2007, 03:26 PM
Replies: 14
Views: 3,171
Posted By esamart

RE: 09 FAI schedules?

CIAM meeting was three weeks ago but minutes are not available yet. I believe some subcommittee members were there but it seems like they attend here often. I assume this is where minutes will...
Forum: Glow Engines
04-13-2007, 05:17 AM
Replies: 4
Views: 1,395
Posted By esamart

RE: YS 61R

With 20% nitro you should decrease compression putting two head caskets or even three. I used APC 12x11 and 13x10 propellers which turned under 10000 RPM on ground with 10% nitro amd Hatpri 650 pipe....
Showing results 1 to 25 of 102
 
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