![]() ![]() The nose has the distinct look of an F-104 now. The scaling has been fudged a bit, as the original aircraft were still quite long and narrow. The engine pods now work to replace part of the wing, as they are flat, slab-sided, and quite wide. They also are larger than strictly scale. The bigger engine scoops will increase frontal area drag. To fit everything in, but there should be no substantial weight increase because of this. I have had to switch from a single engine interceptor layout to a twin engined fighter-bomber layout Then I worked around a 1500g battery, and the size of my Wagon.Īll these dimensions transferred across to the IC version. The size came from materials on hand for a 90mm standard EDF jet It is similar to the concept of "Throwing Good Money after Bad" 30% MORE weight, And that requires still more power So adding 30% more power means adding ca. More Power REQUIRES More Weight to GET that increased powerĪ larger ENGINE in the MODEL size range will have approx. ![]() The FACT being overlooked in sophomoric and extremely naive fashion here - due to a complete lack of successful experience in FLYING aircraft design - is that There is no room in a small locked steamer trunk Joel has spent several years and at least three "builds" to get to this point. Which would you rather have, Owen? If I was interested in VTOL models, I know which way I'd go!ġ) that sounded like quite a small engine.Ģ) the more modern computer controls and control venting will make it behave better. (Plus the song of a mad dentist's drill ) Or, you can have about six minutes of "mosquito fogging" the grass with engine oil, coupled with the occasional hop. So - you can have two and a half minutes of controllable hover time with an EDF. I think most here would agree the IC model was a lot more "marginal" than the EDF one! This is what an EDF powered Harrier model can do today: We have better computers today, but the engine technology hasn't changed much. This is the best an IC powered Harrier could do, back in 2008: It may have a different fuselage, but it's the same VTOL propulsion scheme. Owen: What you are building is essentially a Harrier. The wood is good for drilling the 4 drive bolt holes. I have a 22x8 prop on order.- only wooden props are available around here in those sizes, and they are expensive. Over-rich is not recommended due to carbon buildup. I can't just plug it into a long extension cord.Ī feasible IC solution turns into a marginal battery solution.ģ) I will carefully monitor rpm and time cycles for break-in, There don't seem to be any accessories offered for this engine. Maybe a supplementary draw-though electric exhaust fan?- just across the head? Maybe I need a multi-channel contact temperature monitor? The IR remote sensor is not much use with a shroud and a lid over the engine. I should probably put heat sensors all over the fins to make sure air is getting everywhere- it is not a straight shot, and needs some ducting The full scale vto stuff is marginal at bestĪs size decreases the power to size n weight can become worseġ) I have allowed 18% air flow for cooling. Once you find out what is really needed and you want to use ice, you have a baseline I would use an electric motor to drive the project and find what rpm is needed to get it to fly This heat issue is a big issue and you can easil wreck the engine on extended bench and setup testingįrankly I would not even consider an internal combustion type for your project You really need a cooling setup for the engineīoats are water jacketed cars use heat sink heads Power on two strokes is related to both a correct intake setup but also the exhaustĪ muffled pipe setup properly will increase t rpm range yet still throttle well These racing types can easily be ruined by running slowlyįor anything except for racing or high speed fans They need to run fast at first ,never slowly the typical fit requires 20% racing tw stroke synthetic or mfgs recommendation mix Racing glow engines designed for high rpm are tricker Glow fuel is expensive but no nitro mixes are are more critical Glow 20% synthetic and castor mixes with 15% nitro Use a a slightly smaller prop, drop the pitch or dia a size or two ![]()
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